Questions about a bicycle's drivetrain system, including the chain, gears, chainring, derailers, etcetera.

learn more… | top users | synonyms

0
votes
1answer
482 views

Is SRAM Apex crankset compatible with 6 speed chain and rear cassette

My bike's parts are in need of change and I wanted to do this in stages. Currently it has shimano parts based on a triple mountian bike front crank and derailleur and six speed rear cassette and ...
10
votes
10answers
29k views

While pedaling standing up, bike crank gives in as if shifting, what is causing this?

While standing up and pedaling, the cranks give in as if shifting. It seams like I am shifting down, but my hands are off the shifter, almost like the chain is skipping a link. I took it to a bike ...
3
votes
2answers
1k views

campagnolo wheel on shimano or sram drivetrain?

I have a road wheel that has Campagnolo splined hub and 10 speed cassette. I'd like to know if anyone has any experience running a Campy wheel on Shimano/Sram drive train? I know the measurements of ...
32
votes
4answers
10k views

Why do bikes have their drivetrains on the right?

Every bicycle I have seen in my life has its gears and chain on the right side? Why is this? The only thing I could find regarding this question is this forum topic, which speculates about things such ...
10
votes
6answers
14k views

Mysterious case: chain falling off large chainring, how to fix?

On my commuter bike I decided to rid myself of the small inner chain ring (which is almost never used) and front dérailleur (now redundant). However, I have come across an unusual problem. Whilst ...
26
votes
2answers
8k views

Why does pedalling backwards not move my bike backwards?

On the BMX bike I have, pedaling backwards moves the chain but doesn't drive the wheels of the bike backwards like you would expect it to. Why is this?
10
votes
7answers
4k views

Does gear ratio affect Power?

Let me preface by saying that this may not be the right SE. I considered asking on the Physics SE, but I thought I might try here first. If it is wrong, I am not against it being migrated. From basic ...
7
votes
4answers
17k views

Bike is shifting on its own

Ever since I got my bike (Surly Long Haul Trucker), it has been prone to shifting on its own. This is almost guaranteed to happen when I stand up on the pedals, and happens regularly when sitting as ...
34
votes
5answers
60k views

What are the pros and cons of internal gears?

I've had my hybrid 24-speed for a bit over 3 years now, and just last weekend, when looking for a bike for my wife, discovered internal gears. Suffice to say it blew my mind when I saw 7-speed ...
11
votes
3answers
3k views

How to avoid wearing out gears?

I have a Specialized Tricross which I bought new last year. In that time (approximately 1K miles), I wore out my chain and gears. At least two of my gears are still slipping, even with a new chain. ...
17
votes
2answers
3k 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).
0
votes
0answers
121 views

How do I clean my drive train? [duplicate]

Possible Duplicate: What to use to clean your chain (and cogs)? My mountain bike drive train has accumulated a dirt /oil layer from oiling the chain and then ridding in dirt and muck. How do ...
9
votes
1answer
3k views

Is there a downside to spoke protectors?

A few weeks ago, the derailer on my touring bike caught on the chain and ripped itself off the frame. (See the link below for more info on the incident.) The spoke protector was cracked in half by ...
6
votes
4answers
9k 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 ...
14
votes
2answers
16k views

I'm changing from 8-speed to 10-speed will I need to replace my rear Hub?

I've dug an old road bike out of the garage for the winter and need to upgrade the drive-train, I'm happy about most of what I need but but I'm not sure about the rear hub (an old Shimano Ultegra).. ....
8
votes
4answers
624 views

What can I do to keep my rear derailler in good condition when commuting in the snow?

In the winter, it seems that whatever I do, my rear derailleur stops functioning after few weeks of commuting in light snow. Ice always gets in there somehow, and the chain refuses to move the wheel, ...
5
votes
2answers
327 views

What parts do I need to upgrade my drivetrain?

I have a Cannondale M300 with a 7-speed drivetrain. The parts are fairly worn and I am considering converting to a 9-speed as 7-speed components are getting harder to find. What parts do I need to ...
30
votes
5answers
9k views

Perfectly setting up gears - how?

Every time I have my bike serviced, the bike shop sets up the gears on a stand in their workshop. The gears change perfectly on the stand, but when the bike is on the road, the rear derailleur doesn't ...