Bicycles Stack Exchange
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1500 questions
12
votes
5 answers

Air that escapes from tire smells really bad

I’m trying to get an old bike I had in storage up to riding condition. I’ve washed it and there is no foul odor from the bike normally, however when I pump the back tire, the air leak smells really pungent. This is not a problem for the front…
guest12445
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4 answers

Is there an established system (intervals, total intake) for fueling over longer rides to avoid a drop in performance?

I have a supply of 100-calorie food (gels). I go on 2400-calorie rides with a group. (The number is merely my cyclometer's estimate.) In previous similar rides, I found that I remained among the third strongest riders during the first third of the…
Sam7919
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8 answers

Why are mountain bike tires rated for so much lower pressure than road bikes?

Road bikes with their sleek, thin and flimsy looking tires are designed to take extremely high pressures, going up to 130 PSI (900 kPa). Mountain bikes have much more solid looking, broader tires. And their recommended tire pressure is much lower…
Rohit Pandey
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12
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2 answers

What kind of tool do I need to change my bottom bracket?

I want to replace my bottom bracket, but I have no idea what kind of tool to use. What kind of bottom bracket is this? What tool do I need to change it?
Simon Hüning
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12
votes
4 answers

How am I supposed to get into this screw-on singlespeed freewheel?

This is off a neighbour's kid's bike. The pawls weren't springing so I offered to take a look. I've had a couple of similar failures myself and thought I'd open it, clean it, and regrease it. Even with the chain on it felt/sounded dry, more so…
Chris H
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12
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3 answers

Is there a way to wrap bullhorn handlebars to avoid unwinding both in the center and on the sides?

My handlebar tape keeps looking messy because of an incorrect direction, and I can't find an obvious solution to it. Maybe someone can advise? The direction of the wrap for handlbar tape should be oriented so that the tension of the hands of the bar…
goose_lake
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12
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5 answers

Are wider tires better on ice?

Assuming there are no studs, would a wider tire be safer on tarmac with pockets of ice? How does also the profile or other features of the tire impact this?
nightrider
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12
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2 answers

Different configurations for lenticular wheels

I have a question about lenticular wheels for track bikes, originated by watching the last World Championships in 2022. In many situations, bikes have a pair of lenticular wheels, like this case: (from GettyImages: British team riders Neah Evans,…
Andrea
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12
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3 answers

What are the "monument" races?

I heard recently that Simon Gerrans of the new Green Edge cycling team had won one of the monuments. What are these races?
Anthony K
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12
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4 answers

Quality check for donated tubes

I receive a lot of donated inner tubes, which may be perfectly good. How can I check them with confidence and be assured of no slow leak, without damaging the tube or taking an extremely long time?
SamA
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12
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3 answers

Can I update a decade-old mountain bike to modern standards?

About ten years ago, I built myself a new bike, for general utility riding and some light trips through the countryside (tens of miles on towpaths etc). I was most familiar with the classic (hardtail) mountain bike technical ecosystem, so that's…
Tom Anderson
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12
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6 answers

Is it safe to drill a cable exit hole in a seatpost?

I want to route a dynamo light wire internally from the front of the frame to the rear light. The wire enters the frame at the top of the down tube, runs around the bottom bracket, and up the seat tube. Now it just needs a way out of the…
Will Vousden
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12
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6 answers

Why do fixies (fixed-gear bicycles) have one brake on the front?

I've recently started riding a fixed-gear bicycle and I love it. It's simple, light and fast. However, being new to "fixies" I have two brakes with a drop-down bar, like a road-bike. It just feels safer. Many fixies I've seen have one front brake,…
Fandango68
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12
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6 answers

Ultegra RD-R8000 derailleur chewing up shifter cable - WTH?

I have an Ultegra RD-R8000 (GS cage) that has chewed up multiple shifter cables (Dura Ace and Jagwire) at the cable bolt. Seems that when in a high gear (11t chainring) the cable bends over the clamp edge and starts to fray there. Have any of you…
bryan h
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12
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3 answers

Can I govern an ebike down to a lower speed?

I commute on my bike for fun and exercise, but my commute has two steep hills that kill my legs and add a significant amount of time to my route. I've looked at ebikes for their electric-assist ability as a way to smooth out the steep uphill…
David
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