The cogs (gears) at the front of your drive chain, connected to the cranks.

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445 views

upgrading gears to Shimano XT

My bike is a ClaudeButler CapeWrath D24, with Shamino Alivio gears front and back. I was thinking it would be good to upgrade these to something like Shamino XT, at least on the front to start with. ...
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2answers
363 views

mountain bike chainsuck, replacing parts while thinking of future upgrades

I have been having what I believe is called chainsuck for a while now. Chain will get stuck between first and second ring and have to stop and pull like "%&$* to get it out. It is always the ...
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2answers
325 views

How can you tell how far apart your chainrings are?

I just replaced my cassette and my crank with one from the LBS that the guy said would work. I've had no problems with the cassette, but the crank is too wide so that my front derailleur does not ...
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3answers
2k views

Bent Chainring causing chain to attempt changing gears

I was riding my road bike last night when something strange happened. I stopped at a stop sign. (I didn't have time to slow down so I was in my highest (fastest) gear. When I started I had to press ...
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1answer
1k views

Truvativ Firex chainset replacement middle 32 tooth chainring & bolts

I have a Truvativ FireX chainset from 2008ish, I'm looking for a replacement middle chainring however, no shops seem to stock replacements for Truvativ chainsets. Just wondering if anyone has any ...
3
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1answer
455 views

Chainring and cassette compatible?

I've got a 20 year old Cannondale mountainbike (model # scratched off long ago). It's been used as a daily commuter for a few years and for a couple long trips. I've been told that the original ...
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2answers
2k views

Is there a practical gain from elliptical/oval chainrings?

I have seen competitive (amateur) cyclists with oval chainrings (front). What is the deal? Are they just for showing off, or is there a practical gain from it (different force transfer).
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6answers
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Why would a manufacturer change chainring sizes drastically between years?

A friend was just showing me the 2010 Cervélo S2 specs, as well as the 2011 S2 specs, and the Ultegra line, at least, changes from a 53/39 chainring set in 2010 to a 50/34 set in 2011. This seems like ...
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4answers
5k views

Differences between Biopace and Rotor cranks

On mountain bikes of a certain age, "Biopace" chainrings are ubiquitous. These chainrings are (purposely) not circular. It seems that most people today agree that Biopace rings didn't live up to the ...
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4answers
4k views

How much distance can I put on drivetrain components?

I figure the jockey wheels on my derailer will last nearly forever, but what about the rest: cassette, chainrings, and chain? How many miles, kilometers, or furlongs do they normally last? I know ...
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4answers
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How to fix front gear taking 2 shifts just to move onto next cog

I was out on a ride yesterday and several times when I was changing up and down between big chain ring and little chain ring (I only have the 2 rings up front) it required 2 gear changes. The gears ...
6
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2answers
3k views

How can I keep my chain from falling off the inner chainring? (specifically, from getting stuck in the bottom bracket)

I've got a mountain bike which occasionally drops the chain off the lowest gear, and then the chain gets stuck in the bottom bracket. This happens while pedalling. Once the chain is there, it takes ...
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6answers
14k views

Does this chainring need to be replaced?

Here is a closeup of my triple: All three rings are Shimano Ultegra and have never been changed. They probably have at least 12000+ km on them. I've been pretty good about changing the chain ...