adjustable bottom bracket


adjustable bottom bracket
[1] A component of a bicycle through which the crank fits. It has two bearing cups on either side. One cup is fixed in place while the other is removable or adjustable.
[2] This is the older type of bottom bracket before sealed cartridge bottom brackets became prevalent. The adjustable bottom bracket requires fixed and adjustable cup tools to properly tension the bearings. The bearings are not sealed, but they're easily accessible for cleaning and lubrication.

Dictionary of automotive terms. 2015.

Look at other dictionaries:

  • bottom bracket — Bicycle component that is inserted into the bottom bracket shell. The bottom bracket consists of the crank axle (bottom bracket spindle), ball bearings, and (in older style bottom brackets) a fixed cup and an adjustable cup. Crankarms are bolted… …   Dictionary of automotive terms

  • bottom bracket, adjustable — See adjustable bottom bracket …   Dictionary of automotive terms

  • Bottom bracket — A square taper cartridge bottom bracket. The bottom bracket on a bicycle connects the crankset to the bicycle and allows the crankset to rotate freely. It contains a spindle that the crankset attaches to, and the bearings that allow the spindle… …   Wikipedia

  • adjustable cup — The left hand cup in a bottom bracket of a bicycle, used in adjusting the bottom bracket bearings and removed during bottom bracket overhaul. The other cup is the fixed cup …   Dictionary of automotive terms

  • List of bicycle parts — This is a list of bicycle parts.*Axle *Ball bearing *Bar ends extensions at the end of straight handlebars to allow for multiple hand possitions. *Basket cargo carrier *Bottle cage a holder for a water bottle *Bottom bracket The bearing system… …   Wikipedia

  • Lockring — For the Bronze Age jewellery, see lock ring. A lock ring is a threaded washer used to prevent components from becoming loose during rotation. They are found on an adjustable bottom bracket and a track hub of a bicycle. Lokring is another form of… …   Wikipedia

  • Cortina Cycles — is a bicycle frame manufacturer in Santa Barbara, California. It has made frames for Italian companies such as Bennotto, and Gios. Cortina Cycles. Type Private Industry Bicycles Founded 1955 Headquarters 2024 Mountain Ave, Santa Barbara,… …   Wikipedia

  • Bicycle frame — Steel frame of 2000 LeMond Zurich road racing bicycle mounted in a work stand …   Wikipedia

  • Bicycle tools — Various bicycle tools have evolved over the years into specialized tools for working on a bicycle. Modern bicycle shops will stock a large number of tools for working on different bicycle parts. This work can be performed by a trained bicycle… …   Wikipedia

  • Bicycle suspension — refers to the system or systems used to suspend the rider and all or part of the bicycle in order to protect them from the roughness of the terrain over which they travel. Bicycle suspension are used primarily on mountain bicycles, but are also… …   Wikipedia