This article will assist in identifying the crank system found on your bike, and direct you to the article that outlines the full process of removal and installation. Cranks are levers that connect the pedals to the bottom bracket spindle. The cranks are fitted with toothed sprockets called chainrings that drive the chain.
Bicycle bottom bracket crank hanger shells fall, in general, into two groups, threaded and threadless. One-piece cranks fit only the unthreaded shells One-piece cranks are the easiest type to service, and require no special tools.
The BB assembly may also consist of spacers and lockrings, etc. A good-quality BB, correctly installed, should serve you with years of trouble-free riding, but bearings can wear out or the BB can become loose. Find out more about the differences between BB standards and to help you choose which one is right for you.
Your bottom bracket is housed in the bottom bracket shell of your bike frameit connects your chainset to the frame and allows the cranks to turn smoothly. When selecting a replacement bike bottom bracket you need to make sure that you get the correct model. This guide will help you get the right one to fit your bike and also your pocket.
Chapters: Introduction What Style of Riding is for Me
In more than 10 years of wrenching for pros and even more years as a bike shop mechanic, I've learned a few things about bottom bracket repair. Most of the time, the true cause is a loose chainring bolt. Tighten 'em up and that'll quiet most creaks.
The bottom bracket is what allows your cranks to turn. If your cranks are wobbly, or there's a noise coming from between your cranks when you pedal, then you may need to overhaul your bottom bracket. This instructable a remix of FriendofHumanity's 'ble will show how to remove, clean, lube and adjust most adjustable bottom brackets using only common hand tools and one "special" tool.
Nowadays, bottom brackets have disposable sealed cartridge bearings and, as frames have got beefier, bearings have increased in diameter to allow for lighter, stiffer chainsets using larger axles. And so goes the irresistible march of technological progress. However, while a traditional bottom bracket sits inside the frame and includes the axle in a single unit, Hollowtech bearings sit outside the frame and the axle is integrated into the crank.