Showing posts with label mechanics. Show all posts
Showing posts with label mechanics. Show all posts

20 Apr 2016

Bike Fit

Cycling isn't inherently comfortable. There are so many things that can hurt when riding, and as one accumulates years, so one accumulates... 'aches and pains'.

But there is pain, and then there is pain. (There is also the other pain - the feeling of parts of your body that have had their structural integrity compromised... but I think our imaginations have this one covered, and I'm going to leave this one out so I don't tempt fate.)

There is what I would consider to be fairly normal pain. The post-training-week bruised feeling of thighs that feel like they've been used as punching bags. That general overall feeling of dehydration and gnawing hunger that is only sated by the pizza and beer that your Top Secret Trainer has 'recommended' you avoid. The two-days-later ache of giving it everything you've got (and then forgetting to stretch), and the infamous burn of just going as hard as you possibly can.

I'm led to believe these things are character building, and have something to do with the general concept of getting fitter. For these, I'm told, the cure is a good stretch, some rest now and then, and a heaped teaspoon of cement powder stirred thoroughly into a hot cup of coffee, once per day (or as required), to improve intestinal fortitude.

Then there are the niggly pains. The ones that creep in over time, or don't even seem to be related to cycling at all. The ones that can't simply be attended to by meditating on Rule 5. Toes and fingers that go slightly numb, shoulders that seem to retain some form of tension that indicates they've forgotten to relax in the last week or so and make it hard to get comfortable on the bike. The hips hurt, the lower back burns, stabbing pains in the knees and a constant aches in the triceps, and it can get bad enough to suck the life out of you. Over time a couple of things seem to happen - either you get used to it, which isn't always a good thing - or it simply never stops hurting, and possibly gets worse as time goes on.

All this makes it painful to ride a bike for any amount of time. We spend hours on road bikes in one of a few pretty silly positions, physically, and when it isn't comfortable... well it can literally be a pain in the arse.

And that is why we, apparently, invented bike fits... and I've had one on my List Of Many Things as something to get done well in advance of Taupo.

I've never felt that my bike was quite right. The general size and shape of it fulfils a bunch of basic requirements - two wheels where you'd generally expect them to be and a couple of other handy components that, for the most part, make it go forward and around corners. It was also infinitely more comfortable than the last bike I'd ridden - the one The Engineer had lent me for approx 2500km. The thing that bugged me was the little things - the exact positioning of the components - it never quite felt quite right to me, and while I could probably tweak it myself, I'm not exactly sure where to start, so I've been intending to get someone with a vast amount of experience to, basically, do it for me.

When I purchased my bike I was given a bike fit. This was after I'd agreed to purchase the bike - a decision that I'd made based on a bit of research that, in itself, might be topic of another blog post altogether. Save to say that the basic requirements at that time were price and the frame has to be the 'right' size.

This original fit went rather smoothly. Nothing needed swapping out, all the parts were exactly the right size for me, and the bike seemed, magically, to be exactly what I needed. A couple of washers were added to the pedals to space them a bit wider, but that was about it. I rode away from that with a bike that seemed to fit exceptionally well and rode it for months, quite happily. But I also rode away with this idea ticking at the back of my mind - a feeling that it was all too easy. Like going to a tailor to get a tailor-made suit and being handed one off the rack that is, according to the tailor, exactly the right fit.

Purchasing a bike before getting fit for it wasn't necessarily the cleverest of ideas, but you need a bike to get fit to, and if you get the wrong bike you'll end up having to get another one. At least the second time around you'll know what you need to get. I'm now realising that I don't know how you'd step into this cycle without buying a bike fairly blindly in the first place... perhaps some clever person has come up with an answer for that?

Because I've been getting uncomfortable on the bike, and because of the lingering feeling that it might have not been set up in the first place, I asked around about bike fitters and The Colleague, as full of awesome advice as ever, recommended Anthony from Bikefitter. I looked the guy up, and found that Anthony is a cyclist, a physiotherapist, and a bike fit expert. He's also a bloody nice guy to work with. Friendly, knowledgeable, and refreshingly straightforward.

And he wasn't invested in selling me any parts.

Anthony works out of Christchurch and does a few fits a week as a part of his practice as a sports physioherapist. Luckily for the rest of us he also does a world-tour of New Zealand once every three months or so, and I managed to catch him while he was up in Wellington last week. While travelling he bases his fits out of a friends' garage, which sounds sparse - but to me is the quintessential bike experience - setting up your bike in the garage with a mate seems the exactly the right way to do it.

I was slightly nervous going in - the fear that I'd be told that I had to replace my whole bike because it wasn't going to be suitable for me, or what I wanted to use it for - the concern that I'd have another "na mate, looks like it's all set up pretty sweet aye" bike fit and waste my cash. My nervousness probably didn't show though - even though the first time I went up to meet Ant I actually forgot to take my bike with me. Thankfully I only left it on the car so didn't have that far to go and get it!

We got down to it, and the rest of the evening was a blur of video cameras, dots, allen keys, callipers and the fan-blades of a stationary trainer. We talked a lot, lots of things were moved around, and I came out the other side with a lot of information - some of which I'm still percolating as I go about my training.

We started with a pretty thorough run-down of my collective injuries and how I feel they affect my cycling, then he watched me cycle for a bit. We then talked about my posture, he took some video, measured some angles, watched my technique and made some more very accurate measurements - and along the way he made a observations about my... everything.

It went something like this: My cleats were too far back so my foot wasn't sitting in my shoe properly, and my ankle was too high to pull through on the stroke properly - though this was also partly because of my technique which 'could use some working on'. My saddle was a bit too low, and with my cranks a bit too long, my belly getting in the way and my tendency to sit forward on the saddle because it isn't the right width; meaning that my hips had to lift out of the way to allow my thigh to come up high enough to clear the top of the stroke. This caused me to want to lengthen my back and lift my belly and hips out of the way, so I was lifting up my shoulders to make my back longer. This rotated my shoulders, moved my arms, caused my elbows and wrists to get in strange angles, made it harder to breathe, and put my neck in a funny position. My handlebars were, thankfully, the right width, but the angle on them - rotated forward/back - was a bit off, and they were a bit too high, which had further impact on the way I was using my hips and holding my shoulders.

It turns out that the way the bodys' bits interact is pretty darn complicated.

A lot of the outcome was fine adjustments to my existing setup - cleat position, saddle height, bar height and angles. Just having those things tweaked a tiny bit moved the pedals away and brought the whole front-end of the bike closer to me so it didn't feel as if it was as much of a stretch to get there. He even adjusted the reach on my brake handles so I don't have to go grabbing for them when I am in the drops. Awesome!

There are a few things that have to change though, and it's a good indication of the type of thing that can come out of a bike fit. In theory I'd rather change small things than get a whole new bike, but this could be a fairly expensive set of changes.

So I'm in the market for a new crankset with 170mm cranks to replace the 172.5mm cranks I'm currently using. On the up-side though I'll be dropping my gearing down too, which is more of a recommendation than a requirement, and something that I've been thinking about on and off. As I live in Wellington hills are pretty much unavoidable and with my current weight and level of fitness I can't currently spin up some of the gradients around here with my 36/25 gearing, so when I replace the crank I'll be dropping to a full compact. I might also be dropping the cassette for a 12/27 - currently 11-25 - for the same hilly reasons - not to mention that I've managed to wear out the first two gears in my current cassette because I simply can't go up the hills in anything higher. It seems like this will all work out nicely.

There is also the possibility that I'll need to change the stem from 100mm to 90mm or so. At this stage we're not sure if it will be required though, as first I need to change the saddle.

The saddle needs to go because, basically, it isn't wide enough, and therefore I sit on it funny. I'm not devastated as I've actually not felt comfortable on it for a while anyway, but now I have a clear idea of why it isn't comfortable. Great news is I'll get to try out some of the saddles that The Mechanic at Kiwivelo has been raving about. I'm not going to miss this old saddle - it was a pain in the arse. Ha!

Discussing saddles revealed another thing that amazed me about Anthony. I asked him a lot of questions about replacing the saddle because the darn things are bloody expensive to make too many mistakes on. Replacing gears and cranks is pretty straight-forward - you get a very limited range of options so there is very little thinking to be done. On the other hand - saddles - there are probably 1000's of the damn things out there all with their different advertised forms and features... yet here he was; standing in a garage in Wellington, rattling off which brands were likely to have which sizes, what width-increments some of the major brands had, which brands didn't do different sizes, who had good saddle-try-out systems. I admire a mind that stores that kind of information for immediate regurgitation.

Anthony was so impressed with my physique he requested to see me again in 3-or-so months when he is next in Wellington. I'm pretty sure it's because he needed to remind myself of my prowess as a cyclist, and has nothing at all to do with the fact that I need to change a lot of things about my set-up, lose up to 15kg, get better at riding up hills, have improved core stability, and learn to pedal properly.

The feedback was awesome and I have a slightly better idea now of how I should be holding myself when I ride the bike - how I should be pedalling - and I can do all of this knowing that the bike is set up for me by the same person who is doing the recommendations. It all fits together.

But how does it ride?

So after getting the bike fit done we'd actually planned to take a week off so B could attend and present at a conference in Hamilton. This had originally been a week that my Top Secret Trainer and I had discussed as a no-riding week, but in light of the bike fit, and with my beautiful wife's seemingly endless tolerance for my cycling; we decided to take the bike away so I could do some sweet riding around other parts of the country.

So I got to take my new set-up on holiday, and took a spin through the back-country of the Manawatu, checking out the awesome countryside between Kimbolton, Rangiwahia, and Mangaweka. This is the type of cycling I love - beautiful scenery, being chased by enthusiastic sheepdogs, long winding descents down sheer sandstone cliffs, and rickety one-way bridges that cross crystal clear rivers.

And the whole thing hurt, and the bits that don't hurt feel... strange, and when it all seemed to be working well everything felt... smoother.

It seems the tweaks in my posture have moved the niggles around, or set right imperfections in my pose, so it seems that a lot of the ongoing pain of imperfect posture have been magically turned into the other type of pain - the one that can be handled by mulling over The Rules while sipping a nice warm cup of Harden Up.

I am struggling with changing my technique and I can see that I'll be working on this for a while to come. I have to keep reminding myself to roll my hips forward, or to lower my heels during the bottom of the stroke. It is a flow-on effect that starts when I realise that my shoulders are up around my ears - lower the shoulders, the hips, lower the heels - or when I realise my feet are doing the wrong thing; the reverse happens; lower the heels, reposition the hips, feel the shoulders lower themselves.

I'm not breaking any records, though it is also fair to say that I am probably not breaking myself any more.

Or, at least, not as much as I was.

I'll follow this up with Part 2 when I get my second fit done in three-ish months - then I can do some of that long-term reflection and see what differences I think it has made. Overall, though, I would recommend that you check out getting this done by a professional, and I highly recommend Anthony for the job.

21 Mar 2016

Keeping it ticking over

It seems to be the month for it! 3000km have come and gone since I purchased my bike and it's time for some scheduled maintenance.

I'm relatively happy about this. It's not going to be overly cheap, but apparently this isn't a cheap hobby (although a quick Google for 'expensive hobbies' returns plenty of lists which 'cycling' is not mentioned in. Perhaps I should take up Aviation?)

Throughout the rigmarole with the strange noises coming from my bike I've become more conscious about the wear and tear on the bike. The idea of losing brakes, traction, gears... any number of things could be devastating at any given moment, and even the best-case scenario means time off the bike or training rides cut short.

With this in mind I've been keeping an eye on my chain wear using the old 'measure it with a set of callipers' method, and at the time that the chain showed noticeable amount of stretch. I also noticed that the chain started to get louder, and the shifting started to get a little rougher - kind of louder and less crisp feeling.

So off to my Favourite Mechanic I went, bike in hand, and today the bike is in for a few little tweaks and upgrades:
  • new shifter and brake cables
  • new chain
  • new bar tape
  • headset tighten and check

I'm led to believe the shifter cables that came on the bike were pretty inexpensive. They were coated with some form of plastic that has worn off and gotten everywhere and all jammed up in the cable housings. The brake cables didn't seem to be that fancy either and have effectively corroded, and the rear brake is feeling sticky. It's not terrible, but there is a definite lack of modulation. Actually it's pretty terrible. The plan is to replace the cables with either Jagwire, or stock Shimano cables. It's going to be a bit of a surprise to see which one the mechanic goes for - either way it will be better than what I've got now.

I'm a bit sad about the bar tape. I was running bright orange Lizard Skins, which were tacky (as in 'sticky', thanks!) as heck and BRIGHT ORANGE! Unfortunately they have worn through and are rather dirty from all the use. The plan is to stick some orange fi'zi:k tape on there. It's more 'Orange' than 'ORANGE', but slightly more padded, and hopefully should stay a bit cleaner for longer. I've used the black version before and been pretty happy with it. The extra padding will be nice too; I broke my thumb a few years ago and it gets a little annoyed over longer rides. Of all the things, the bar tape is the one that I'm most attached to.

The headset is an interesting one that I've learnt an interesting lesson from, I think. A few months back as I was breaking in the bike the forks got a little play in them. I didn't think anything of it and got some tools out to tighten it all up - and accidentally pulled apart the compression plug that holds the top tube cap on. I managed to get it all back together, but in the process noticed that the top headset bearing had no grease around it. I had a look at the bottom bearing and it was all greased up, and after talking to a mechanic confirmed that I did make the correct decision by greasing it before putting everything back together.

The thing that I learnt from this, along with the bottom bracket going, was that it isn't to be assumed that a bike is put together correctly to begin with. The mechanics who were looking into the BB mentioned that they don't always get put together properly in the factory and it does happen that they miss things. If (or more likely when) I purchase another bike I'll be ordering a complete strip-down and re-build of the bike before I take it out of the shop. I might even have some idea of parts I want to replace before I ride it, like the cables, brake pads, and a stronger BB for example. I can't imagine this will be free, or even cheap, but knowing that these things happen out of the box I can see the advantage of fixing these problems before they even happen. Something about prevention and cure?

But for now, it's time to part with my money. I could do this myself. I know I could do it myself, but the idea of dropping the bike off in the morning and getting an overhauled machine back at the end of the day tickles my fancy.

Plus, I'm shit at wrapping bar tape.

Epilogue:

The results are in and they are pretty awesome - the new tape looks mint and matches the colour that I have in my head when I think about the colour of my bike.
The brakes are smooth and responsive - just how I remember them from the first time we rode (awww...)
When I first picked up the bike I noticed that the chain didn't mesh quite right with the rear cassette - the occasional 'click'. Apparently this is because the chain needs time to wear in to the cassette (unless I want to replace the cassette as well) and it should wear in within a few hundred kms - so by mid-next week basically!

Shifting on the way home, however, was another thing altogether. Silky smooth, highly responsive - she shifts so quickly, and next-to-no chain noise whatsoever.

I could get used to this. What a way to start the weekend!


14 Mar 2016

Squeaky Noises

In the middle of the country there is very little noise. The wind in the trees, a babbling brook, the occasional farm-related animal sound far in the distance, and the peace only being broken by farming equipment trundling along. Cars occasionally whoosh by, but for the most part it's just the sound of heavy breathing, and rubber on tarmac.

I love this landscape of sounds. It's peaceful. It's one of the reasons I am here.

The sounds I am not expecting are from something on the bike going 'plink', 'plink'. Creaking noises. rattles. The resulting thoughts start to flow... What is it? Where is it? Then it goes away - whew. Possibly a stone?  5 minutes later; 'plink plink, tinkle'.

It could be a creaking stem that you only find out about on that hard climb, or it could be a slightly under-oiled chain. A misaligned dérailleur in the wrong gear perhaps, or a cable rattling against the frame.

Some noises are to be expected, the general sounds of a bike working aren't exactly silent - there are a lot of moving parts and other parts bolted to those parts.
But there are some noises that scream 'broken', and to an inexperienced and slightly paranoid bike mechanic such as myself these noises can bring all sorts of concerns to mind.
Is a spoke about to break? Is the frame cracked? Is this something normal and to be expected, or is something about to go hideously wrong?

Over the past couple of months I've had a few noises on the bike that have turned out to be pretty simple things - the cable for my front light banging against the stem and a slightly misaligned dérailleur were two that were simple to fix and made riding a pleasure again. But there were two things that went rather wrong and were pretty horrible to deal with.

First the bottom bracket decided to go. It started with a tinkling noise that pretty quickly evolved into a noise that sounded like a couple of metal walnuts being ground against each other in a bag of sand. Whenever I took to a hill or applied any pressure to the pedals I was met with this crunching noise. Turns out this type of thing is pretty simple to fix - you just replace the bottom bracket! I have a lot of respect for the mechanics at Capital Cycles who spent a good deal of time trying to figure out where the noise was actually coming from, then fitting my ride in to lovingly replace the BB before something terrible happened. The final theory is that it wasn't put in properly by the factory - slightly off-centre and eventually ground itself out.

I rode home from that really happy and took to a big hill to try it out, and it was silky and smooth, and best of all quiet... except for that bloody tinkling noise!

The rear wheel.

I'm led to believe that the wheel-sets that come on bikes are pretty low-end, but I've never really thought that hard about it until now. Perhaps it saves cost, perhaps they are simply provided as fillers as you are expected to bring your own... I'm not sure. This was a set of Shimano RS-11 wheels, which for all the reviews had as solid, heavy and 'bulletproof'; a common technical term for wheels it would seem, and the rear wheel was actually responsible for the tinkling noise. (This wheelset is so awesome , in fact, that I had to link to Wiggle; because Shimano don't actually list RS11s on their own website).

The problem was small. Annoying, just sitting on the edge of hearing. It was as if there was a small piece of swarf stuck in the rim that moved around occasionally, or a spoke moving around; a light tinkling sound similar to someone dropping wet grains of sand into a metal can in a quiet room, and totally unnoticeable until I was riding in a quiet place. The problems' sheer lack of volume made it all the more challenging to diagnose - bike shops tend to play music, have other general noises, and are often positioned near roads - all of which were loud enough to drown out the tiny little tinkle.

Not that I wasn't taken seriously, but without a firm diagnosis it isn't really possible to target a solution to a problem so we went through a few attempts at fixing it - a wheel service to straighten out a slight kink in the rim, a general tension check, and a disassemble of the hub and associated magic to check for problems; but no luck. I had a bright idea one evening and put some oil on the hub-ends of the straight-pull spokes and thought I had solved the problem. About a week later the noise starts again. To be honest the noise was so quiet it could have been there the whole time.

We have a rather skilled Velominatus at work who was happy to take a look at the problem and gave the wheel another truing and a good going over, which was magic in itself as the tension made the wheels feel a whole lot better, but again within a week... tinkle tinkle.

It was at this point that the noise became something else. It wasn't a tinkle, it was a threat. It was a warning of impending doom, a sign that something was wrong. It was chasing me down the road during the day and starting to haunt my dreams. I couldn't ride them any more. What if they collapse when I'm going down a hill? What if a spoke breaks? What if the weld in the rim is imperfect, snaps, and I get the sharp end through my chest right before my face hits the ground at 40km/h?

I started to fear my bike, and something had to be done.

It became academic. It was a simple problem with a simple solution. The old wheels were going in the bin, the only obstacles bring my insatiable need to ride, and my No-Budget. How much money do I have, and how much wheel can I get for that price?

What do wheels even cost?

Living in Wellington I have the luck of having Wheelworks right on my doorstep; so I had a talk to the wonderful Tristan Thomas and got a very reasonable quote for something that would be perfect. I've watched these guys build wheels before and I am very pleased that someone regularly takes the care and attention to building wheels that I would take should I attempt to build my own. They are simply amazing.

Unfortunately though, with my No-Budget the Wheelworks wheels will have to be saved up for, so an interim solution was required, and came quite by surprise at Kiwivelo.

My Favourite Mechanic works at Kiwivelo, and I was in there one lunchtime with mate looking at some options to fix up a his bike, and being in a bike shop is always an excuse to have a look at the things I don't have that I probably don't actually need.

I was having a lustful look at a set of rims on the shelf - mentally checking them out so I had something to compare details later. The wheels were a set of Fulcrum Quattros. I had the Fulcrum 5s, Quattros, and 3s on my list of sets that were kind of within my price range, and kind of not, depending on whether I would have to pay import duty on them - then there of course is the ultimate question of whether to buy local or online, especially for something that might need servicing.

I was half-way through all these thoughts when my Favourite Mechanic waltzed up to me with a price that I quite simply could not ignore. It was marginally higher than the online cost, but it came with the sublime knowledge that I'd be able to complain if they made noise, and that someone I actually trust with my kit was there to be hassled; knowledge which is well worth paying for. So I pulled the trigger on them.

Boom. New wheelset, 25c tyres, tubes, installed on the spot and I rode home that night.

First, and by far the most important: Silence! No noise. No weird tinkling noise (thankfully it wasn't something else!). The sweet sound of wheels doing exactly what you'd expect, and nothing more.

The wheels are also smoother, stronger feeling, seemed to put the power into the road more, probably due to less flex? The road noise is muted - most likely due to the 25c tyres and lower pressures I would assume. I'm sure all the other things that are said about new wheels, wider rims, and 25c tyres are all applicable, but that isn't the point.

The difference I feel it has made to my ride is similar to the difference I noted going from a 2007 alloy bike to a 2014 carbon bike, again.

Now the hill-climbs sound like rubber being slowly torn from its bed on the tyres, the strain of the chain on the cogs, and the whirring of bearings. One can even imagine the sounds of heavy breathing, and sweat dripping on the top-tube. The reassuring sounds that everything is functioning perfectly, and nothing is out of place.

Exactly the sounds you'd want to hear.

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