The Re-Cycle Shop

Click here to edit subtitle

Glossary of Terms

Glossary of Terms

Wheel Axle - The threaded rod that goes through 


the wheel hub on which the bearings sit and 


allows the wheel to spin freely.



Bottom Bracket Axle - The metal rod that goes 


between the two pedals through the bottom of the 


frame. There are three different kinds of bottom 


bracket axles, a tappered axle, a straight notched  


axle and a sealed cartridge axle. The pedals attach 


to this axle.

Bottom Bracket - The bottom bracket is the 


lower part of the frame that houses the axle to 


which the pedals are attached.

 Bottom Bracket Bearing Cup - Round metal 


threaded cup that threads into the bottom of the 


frame and holds the bearings on which the 


bottom bracket axle rotates.

Ring Bearings - These are ball bearings that are 


held in with a metal ring. They are used in the 


wheels, bottom bracket and head sets of the 


less expensve bikes. The more high end bikes 


have a loose bearing system.

Loose Ball Bearings -Ball bearing for a bicycle 


are steel balls that  are used with a axle cone 


and bearing cup to spin the axle freely. 

 

As with the ring bearings they are used in 


the wheels, bottom brackets and head sets. 


Loose bearings require one or two more 


bearings than the ring bearing for the same 


application, but the loose bearing system runs 


much smoother. It is the bearings


that must be well lubricated.



Axle Cones - Are tappered threaded steel. They 


thread on to the axle and are used to hold ball 


bearings against the cups. They are also used


to adjust  the free spinning of the wheel,


 bottom bracket or head set.


Wheel Cup -The wheel cup is a cup shaped part 


of the hub and axle assembley. 


The hub assembly also holds the spokes, 


 The ball bearing sit in the cup and the 


 axle cone keeps them in place. 


These two components allow the wheel to 


spin freely. 



Headset - The headset is the front portion of the frame that 


holds and attaches the handle bars and the front forks. 


 There are two types of headsets, threaded and non threaded 


 Both are very good and contain bearing seats, bearings


 and cups.

Brake Bosses - Brake bosses are attached to the front forks 


and rear frame that hold on the brake 


assembly. These are used with what is known as the V-Brake 

style, as pictured. There are also cantilever brakes and side pull 

brakes. There are also disc brakes. Some disc brakes use a 

brake fluid and other a cable.

Rear Gear Cluster  - The rear gear cluster is 


mounted on a freewheel or the gear cluster itself 


 free wheels. It is mounted on the right side of 


the rear wheel and will have a various number of 


gear rings. The chain moves through the rear 


derailleur and that is what moves the chain up 


and down the gears.

Rear Deraillleur - This is the mechanism that move the 


chain up and down the rear gear cluster. It must be 


adjusted properly for smooth shifting.

Front Derailleur - This is the mechanism that move the 


chain up and down the gear rings that are attached to the 


pedals.