GMC Cycling - Popular Questions, Answers, Tips & Manuals
Why does the expander on my handle bars always come loose
Remove the bolt and put a lock washer between the bolt and head. That or put some blue loctite on the threads. Just remember to have the head removed from the fork tube before the bolt comes out or the expander will come off in the forks.
Install spear pump
Sounds like the braze ons, that's what they're called, are broken in the frame. Only thing left is to drill them out and replace them with Rivnuts. Your local bike shop should be able to handle that.
3/12/2014 7:09:02 PM •
GMC Cycling
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64 views • 0 helpful votes
Replace brakes for denali 700c
just go to a higher end brake pad that should work.First make sure the cable is adjusted properly, that could be the whole problem. Maybe you're just used to the bike now and are going a lot faster than you used to.
Where do you to install frame pump?
Thats were they go ,is and unscrew / screw back up .take water bottle cage out ,put the bracket for the pump,in top put your water cage ,put bolts back in , secure it and u should be good.the only reason you shouldn't be able to fit it ,is because is not for a bicycle .
The front gears are not shifting. How can I fix it? And also how can I adjust the brakes?
When was the last time you replaced your cables?If you have checked that every other part of the drive train is free from obstruction (eg. move the front deralieur with your fingers) then I would strongly suggest looking at your cabling. Once new cable are fitted then you can adjust the limit screws on you deraileurs to get your gear shifting nice and smooth. YouTube is full of useful videos. Good luck!
My rear tire is not
Take the rear wheel off the ground (you could flip the bike upside-down to do this) and try to spin the pedals with your hand. Try spinning it backwards and forwards while you adjust the gears. ...If you adjust the gears while the chain is not spinning, the chain could get jammed. This could be your problem.If that's not it, then try grabbing the wheel itself to see if you can spin it with your hand. If you cannot, then it might just be hitting the bicycle frame or the brake pads. See if you can find the spot where that is happening. If you can, then try to adjust the wheel in the frame by loosening the nuts or the quick-release lever (just push it away from the frame) that holds the wheel on to the bicycle frame... then wiggle the wheel around just a little to see if you can align it so that it is no longer hitting anything. Be sure to either tighten the nuts or push the quick-release lever back towards the frame when you are done. (Don't wiggle it too much unless you want the wheel to come out of the frame!)If neither of these things work, you probably need to take it in to a bike shop. Most shops will give you a free estimate- they should tell you what is wrong, as well as how much it would cost to fix it.
When installing the front wheel,
It sounds like either a bent fork or a damaged wheel. To check the fork, rest the bike on a flat floor with no front wheel in, the handlebars should be in the normal position for going straight (right angles to frame), if the bike sits level, then the fork is ok.
To check the wheel, hold the hub and spin it a bit, you should see a big whobble if it is that damaged.
If it is just the wheel, you can take that back to the shop, otherwise you will have to bring the bike back, sadly.
Hope that helps.
I need to replace the
I'd advise you to consult a bike shop as there may some interactions between a given BB and a given crank that may result in chainline problems. If you work with them and they can't get the recommended parts to work they will have to make it right.
Why is your crank "very worm [sic] after little use"? Do you mean the chainrings (which are replaceable)?
There may be other things at work here that a shop might spot and resolve.
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