Showing posts with label components. Show all posts
Showing posts with label components. Show all posts

Wednesday, August 15, 2012

And so the Legacy begins

In the absence of any project bikes, and despite my recent experience with bits falling off the P3 frame (must buy torque wrench). I decided to start work on my hybrid bike. Over the past couple of months I have been assembling a series of spares to overhaul the quite frankly knackered shifters and the aging drivechain parts. The experience of changing gears has reached the top end of tempermental. Which is to say the occasional inconvenience of forgetting your house keys as opposed to the Alzheimer memory loss.

This bike is a Ridgeback Adventure SX120 - bought back in the early 90's and still going strong. When it was relatively new there was an inadvertant upgrade of wheels and hubs which looks to have been a very positive move as they run as smooth as the day they were fitted. It will also allow me to fit a 9 speed to them taking the range for the cassette from its lowly to 7 and adding a bit of low climbing gears for my tired old legs.

In my previous round of parts purchasing I had picked up some Shimano LX mechs and although I had planned to put these on an MTB build, I have decided that these should be the basis of the equipment change. Should these second hand parts fail then I have the option of buying a new part that will slot into the system. As this is to be a workhorse bike I wanted all the parts to be of a decent level of mechanical soundness. Most LX parts are relatively cheap and the shifters were easily located at a low price due to discontinuation of the items. A 9 speed chain and an HG50 cassette make up the drivechain parts.

The brake levers were also a little tatty and quite frankly as the levers themselves are plastic, I decided that replacement with some Avid Juicy 7's was a nice touch. Finally to complete the comfort rating I am going to add some Ergo grips and a new saddle (the old ones have been on from new, and I'm sure I deserve it).

My first task will be to strip down the bike and clean, I will leave the cantilevers on the bike. I'm not sure I want to go as far as a bare frame rebuild, but when I look at the bike I may change my mind.

Tuesday, August 14, 2012

G-Usain Bolt

In the last year there really has been no time for riding or for working on bikes. So apologies that everything has been very quiet. Having said that being back on the bike has shaken a few things loose. The first bolt to er.... bolt was a crank bolt on "I should Coco". I finished the section holding the crank on by force of will and foot. Now call me stupid, but I would have thought that with a simple machine like a bicycle the range of methods for attaching the crank arms to the bottom bracket were pretty standard. So stopping in Peaslake, I popped into the bike shop for a replacement bolt. Howard he say "No" - apparently no high tech enough for the bikes he sells. Fair enough.

At home I start a search on the internet for a replacement. There on the page is a veritable smorgasborg of crank bolts, all with about information on size, fitting and suitablilty missing or phrased in some sophisiticated arcane manner that makes selection impossible.

One of the beauties of the internet is its accessibility and the range of information available - this time it fails miserably. My nearest bike shop is miles away (to the extent where I think opening one up would be a good business move, if I was incilined that way). Eventually, I make a trip in the right direction and pop in with the other bolt. It takes 10 mins of rooting in the spares draw, but eventually they find one that matches (visually) to what I need. I still have no idea what size, configuation the bolt is.

The process of fitting a new crank bolt is simple - especially when you have put everything together from scratch. Everything is fantastic and I make the next ride some months later it has to be said with no bike failures. However, I don't follow the simple advice that I should clean down and check the bolts etc at the end of each ride. I forget that I have not tightened to precise torque settings and that a few things may have shaken loose from the last failure. So I am out riding solo across some trails and feeling goof about how the bike is handling in the summer sun when clank, clank, clank. Pulling up I discover the bashguard is hanging off to one side. A closer inspection reveals that 3 of 4 bolts that hold the chainring and the bashguard together have gone AWOL. Perhaps that should be LWOT (lost without tightening).

A familiar story on the internet - but here just a bewildering array of choices. A trip to a bike shop that deals in high end gear is unproductive in walking out with desired product, but helpful in learning about variations in chainring bolts and lengths. I am able to order parts and replace.


Friday, September 17, 2010

Not so worn anymore

Yipee - I have ordered some new tyres for the bike (Panaracer FR), you will remember that I said that the ones that came on the wheels were pretty worn. Well the more I looked at the them, the more I felt that the only place they would grip was if I was running at a forty five degree angle. So in the interests of being able to ride the bike straight out of the traps I decided to bite the bullet.

Of course the useful thing about this was that I was able to order an ISIS splined bottom bracket tool for £6 with free P&P. Just need to get my lockring wrench back from uncle Riotous and that little job can be completed as well. See already I am forced down an evolutionary path by the simple design choices that are available. It gives the manufacturers a niche in which to operate for a minimum cost, and now keeps me locked into an evolutionary pathway that will probably see me riding a sportive or triathalon bike in my old age.

Wednesday, September 8, 2010

Bottoms!

Today I decided that I would tackle the bottom bracket fitting on the bike. Now I have to confess this is not entirely new territory for me as I have removed and replaced one before. Essentially, so long as you are careful and don't lose bits it is a slide out slide in job. However, you do need some specialist tools for the job one of which is a lockring spanner.

Bottom bracket shell, TT Gigapipe and TT chainset with chain retention device
The first job is to clean the gunk and paint from the inside of the bottom bracket shell. This is a simple job of toothbrush, white spirit and a cloth to clean up. I don't need to worry about losing some of the paint at the exit as a) its a cosmetic cover up and b) no one is going to see it behind the lockring tool.

Now the real reason for choosing a spare hour and a half to do this is to check out the fitting of the Gigapipe bottom bracket (BB). This is new to me as all my experience is with old square taper brackets. The first thing I notice is that the usual method of locking into place is probably not going to work here. I think I need another tool for the toolbox. I have a bottom bracket tool, but it doesn't look as if it is designed for this type of BB. Curse the world of non standard international design. Shimano are the market leaders, but they do what they like, at least everyone else tries to work from a standard. Although I suspect they wouldn't if they could get away with it. Anyway, it is a Shimano BB tool not an ISIS one. Plus I discover as I look in the tool box there is no lockring tool either. Now where did I put that? Ah Uncle Riotous has it in his garage!  Looks like this will have to wait until the tools are assembled in the same location.

So lesson, learnt I pack it all away again (Bottoms!). Time to drop a message to uncle about said tools. Not all wasted though as having looked at the set up I can see that it is really much easier than a cup and cone or square taper style BB. As an all in one there are no ball bearings or cartridges to chase around and apart from ensuring it is all greased and done up tight the job itself is as simple as pie.

Thursday, August 12, 2010

Parts buying

Right we are almost upto date - the previous sections cover the last month, and in that time I have not been quiet on the sourcing some second hand or cheap parts. A pair of SRAM X.7 shifters of which I now only need one now from ebay. Along with some sale front and rear mechs SRAM X.7 and sale XT Brake arms from Chainreactioncycles.com. Then there are the front and rear Deore SL mechs I bought off ebay and then decided to divert these to a new project (my hybrid). So far no luck on bidding for new wheel/s for a 9+ speed and I realise that the current hub may take a 9 speed cassette as a result of its relative youth. It was clearly a bike put together with the cheapest parts to retail at the highest sales value before the buyer realised they were ripped off (sorry G but you said it). So I need to get it to Professor Riotous for an assessment as I have never seen a hub that accepts 9 compared with one that accepts 7 speed cassettes. Oh and I have double stocked on cables as well.

Current ebay pursuit is a Truvativ Hussefelt Cranks with Chain Guide, handily in Whyteleaf, various potential front forks (including a Z5) and an XT rear mech. I have as a result of being forced into a single chainset decided to try and return the bike to its original setup as much as possible.