Bike Bottom Brackets Review

Poor misunderstood bottom bracket. The bike bottom bracket takes all of the pressure a cyclist needs to pedal and gets none of the credit such as a  Shimano bottom bracket. 

The cylinder-shaped bike bottom bracket is part of the bike drivetrain components that also includes a crank, or chain, set where the flat round crank with jagged edges accommodates the bike’s chain and an arm extending from it attaches to the bike pedals. Bike bottom brackets like the Campagnola bracket and  FSA bottom bracket are nestled inside of a bottom bracket “shell” within the bike’s frame. And, connected to the bike cranks and parts from inside that shell, bottom brackets reportedly allow the crank arms to rotate.

Bike bottom brackets are sold individually and as part of crank sets. So if you were to buy a Chris King bracket, it would be an individaul purchase . Because bike bottom brackets and the shells in which they mount vary in size, it’s important to find the right fit. Cyclists might also consider different bike bottom bracket components that can affect quality, maintenance and adjustability. FSA brackets offer reliability for peace of mind during your ride.

Inside of a bike bottom bracket is a spindle, a grooved, or threaded, cylindrical shaped part that some refer to as an axle. The spindle, or axle, is often titanium, and it can reportedly be made either by forging, polishing after forging or machining from billet, with generally considered the least costly method. The spindle of a bike bottom brackets may also be swathed in plastic, reportedly as a means of protecting the bottom bracket from moisture keeping your SRAM bottom bracket dry. 

Because of the friction that bike bottom brackets endure, bottom brackets can reportedly wear out quickly, and ball bearing assemblies are found inside these and other critical bike points. With bike bottom brackets, these steel balls are generally situated within cup or cone-shaped nuts screwed on near each of the spindle’s ends. The smoother the steel surface of steel bearings, the smoother the feel is said to be. Enduro bottom bracket bike bearings are said to be more easily adjusted than others.

There are reportedly three types of bike bottom brackets, including cartridge brackets, adjustable brackets and “Ashtabula” brackets. Cartridge bottom brackets are said to be a more contemporary design, while Ashtabula brackets are said to often be found on department store bikes and older models. Check out a Phil Wood bottom bracket  or Truvativ bracket to find adjustable models. 

In terms of maintenance, cartridge brackets are considered better protected in that the steel bearings, or balls, sit inside containers. At the same time, accessing this type of bike bottom bracket reportedly requires removing the entire crank set. Cartridge bottom brackets are said to more often be removed and replaced, rather than serviced, when they were out.

Adjustable bike bottom brackets, on the other hand, are equipped with cups that, like the spindle, can reportedly be removed and replaced, and the bottom bracket cleaned, greased and adjusted as needed. With Ashtabula bottom brackets, a single piece of steel said to form the bike’s crank arm reportedly extends from one pedal to another, entering the bike bottom bracket in between.

Models

Sinz bottom bracket and Truvativ bottom bracket are reliable models. Sugino bottom bracket is also reliable.

Average Pricing

The prices for individual bottom brackets can start at about $10.99 US, while bottom brackets purchased with crank sets can cost upward of $600 US.