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Nov
5
comment My front deraileur needs adjustment after every ride
What I mean is that there are "barrel adjusters‌​" -- little threaded devices in the middle of the cable or just coming out of the shift levers (or sometimes where the cable enters the derailer). To adjust the cables you twist these, and when you twist them there should be definite "clicks" felt as they're adjusted. If the clicks aren't there (and there isn't a lock nut or some such) then there's nothing preventing them from un-twisting themselves as you ride.
Nov
4
comment What could have caused this flat?
Doesn't look anything like a pinch flat. The holes are too large and are not positioned right for a pinch flat (assuming the OP is telling us correctly where they are located). And pinch flat holes will have fairly obvious abrasions around the actual hole.
Nov
4
comment When going up hills, my gears drop 2 to 3 slots. Is this my cable tension?
If you have the old friction-type shifters, there is always a friction adjustment screw on the shifter. You need to tighten it (in increments of about 1/8 turn) until the lever reliably stays put.
Nov
4
comment Disc brakes vibrating, “singing” under the rain
Pretty normal for auto disk brakes.
Nov
4
comment Should I fear cows?
The main problem is that the cows may not readily get out of your way. Shouting at them from a respectable distance may cause them to move, or they may just look at you and stand there.
Nov
3
comment Does the top tube typically open into the head tube?
In general, there are small holes in the head and bottom bracket tubes to allow airflow through the frame. I wouldn't expect you can get anything large through these holes, but you might, eg, be able to get a small inspection camera through. In your case it sounds like part of the plastic grommet that feeds the brake cable through may have cracked off, or perhaps the cable itself is rattling.
Nov
3
comment Rear wheel odd shape (goes up and down) fixit or buy new?
Yep, the wheel probably needs to be trued. You may have some broken spokes, or just spokes that got stretched out by a bad bump. However, it's also possible that the tire simply isn't seated uniformly on the wheel -- inspect the side of the tire and see that the mold marks maintain a constant distance from the rim edge all the way around. In any event, probably not terribly expensive to fix at your local bike shop.
Nov
3
comment what will happen if I change gears on a mountain bike at a standstill? Will it break?
Changing at a standstill may cause the chain to jam, but should not cause serious damage. (Not sure what "plastic part" you could be talking about -- all the derailer parts near the chain should be metal.)
Nov
3
comment My front deraileur needs adjustment after every ride
Are you adjusting with the barrel adjuster? If so, is it possible that it is slipping? (Normally they should click -- if not then the mechanism may be toast.) The other possibility is that you have a cable that is failing. Or (bike shop should have checked this) the cable clamp is simply loose.
Nov
3
comment Can I measure my bottom bracket size without removing the cranks?
Actually, it's pretty hard to measure BB length even with the cranks removed, since the "length" (at least on a square shaft) is relative to some fictitious location on the shaft (which, at least on some Shimano units, are not symmetrical). Your best bet is to remove the cartridge and hope that the markings on it are still legible.
Nov
2
comment Daily Adjusted Seatpost for Trainer Bike
And you might want to get a quick-release style seatpost clamp.
Nov
2
comment Daily Adjusted Seatpost for Trainer Bike
Just put some silicone spray on the seatpost.
Nov
2
comment What could have caused this flat?
And you checked carefully for holes in the inside diameter of the tube, matching the slits? You could be seeing the "exit wound", so to speak.
Nov
2
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Nov
2
comment Identify my bike
Yeah, that's a bike. Seems to be absent the rear brakes?
Nov
2
comment What could have caused this flat?
Check the tire over much more carefully. And where precisely are the cuts -- on the inner or outer diameter, or on the side?
Nov
2
comment What could have caused this flat?
(What did you find on closer inspection of the first tube?)
Nov
2
comment What could have caused this flat?
Perhaps someone used a utility knife to open the carton containing the tube.
Nov
1
answered Caliper position effect on braking or suspension?
Oct
31
comment Repeat Punctures
Yeah, I rarely remove the tire completely, but if I do I somehow mark the valve position.