Crankset Spindle Types: BB30, PressFit, and Beyond

Overview of Crankset Spindle Types
Cranksets are defined as the pedals of the bicycle which is a large component used to drive the bicycle forward. Thus, the crankset spindle which connects the crank and the frame is also an important element. Whenever butt will lean on the bike and turns the pedal which butt pushes, crank hand will switch to the spindle which drives the transverse bar. The type of crankset spindle bears a lot of potential in changing with the frame design and the rider’s needs. Presently, commonly available crankset spindle types include BB30, PressFit, and retainer.

BB30 Spindle Type
BB30 is one of the older types spindles; this BB30 crankset belongs to the British Cycle Company which was first instance manufactured. It has a simple construction make up with a tubular center shaft with 30 mm diameter spindle thus it is larger than the previous BB standard of 24 which allows it to transmit more power. Usually trimmed BB30 spindles are mated to the appropriate bases to reach forces.

PressFit Spindle Type
This new design, PressFit, incorporates the most recent technical innovation: threadless bearing seat. The PressFit spindle has no threads and is installed directly into the bearing seat of the frame. Such design helps to cut out unnecessary material and make bigger bearings, which enhances stiffness and durability of the structure. Still, SMEs use 30-mm spindles as well, but the ways they install them and what the spindle goes with are different from BB30 ones.

Jiankun Product 
Over the years, our company has been dedicated to the developing and producing bicycle cranks and crankset, bike flywheel bases, chains, and so on. Thanks for a full range of technology, professional and engineering talent in the development and production of machinery our company guarantees stable product quality as we have complete testing and inspection facilities in place.

In Jiankun, different models of cranksets can be seen for example, X6M-713L-4C/X6M-714L-4C which is noted for its great compatibility and is suitable for different models. The U3-413L-4C model crankset is characterized by a number of advanced materials in its production and chainring designs to cater for different riders. The U3-513L-4C/U3-514L-4C model cranksets’ features are popularly reported to be easy to use and quite strong. The U3-715L-4C deserves notice for its excellent smooth steel parts, and the U4-413L-4C for its great gear shifting and sprocket qualities.