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

1 vote

Chainring and cassette configuration

The reality is that this is impossible for anyone to answer for a specific rider, without knowing the rider. When I read “70 year old recreational rider”, my inclination is to assume relatively shor …
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3 votes

Replacing a Force Chainring with a Red

It is possible, as long as you use the SRAM Red Black Edition 2011 or earlier. The new 2012 Exogram SRAM Red requires a different front derailleur design, and while it will physically bolt up, it won …
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6 votes

How do I calculate the diameter of a chainring from the number of teeth?

EDIT: I posted this question on math.se, and got an interesting answer, which basically confirms Lantius' answer as the more accurate mathematical model, and mine as a practical approximation for the …
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1 vote

Are chainring bolts interchangeable?

No, you will need a set that is Campag compatible. Some Campagnolo cranksets use special chain ring bolt that bolt through the ring and into the crank, at least behind the arm. The Athena 11 speed ap …
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2 votes

Shimano 105 - double chainring on triple chainset?

This is not the case with all triple cranks, but with yours, that should be the correct chainring. …
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6 votes

Changing from Shimano Road Double Chainset to Triple Chainset?

If, by "a straight swap" you mean "Can I change only the crank set, and no other parts, then the answer is in short, no, it will not be a straight swap. If I read the question correctly, you are cur …
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8 votes
Accepted

What is the impact of changing to a smaller chainring?

I would consider changing your crankset to a true compact, 50t/34t, and running an 11/25 rear cassette. Campy actually made a specific derailleur for running a compact front, because they said that …
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21 votes

Do cassettes and chains need to be replaced at the same time?

You may need to change your cassette with your chain due to damage, but only if your bike has missed out on some previous maintenance. If you ride one chain beyond the point of wear, it will damage bo …
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4 votes
Accepted

Shimano Chainring Compatability

The current Ultegra chain rings are in fact physically compatible with the 105. They do not look good on the 105 crank, however, because when Shimano redesigned the Ultegra and DuraAce level cranks to …
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5 votes
Accepted

Bottom bracket with built-in internal hub - does this exist?

Technically, no, there is no current commercially available gearbox bottom bracket. Most likely, the Truvativ Hammerschmidt is the crankset you are thinking of. There were also gearboxes designed by H …
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