When the bottom bracket cracks annoyingly...

When it comes to bottom brackets, there are a variety of mounting standards and unbolted bearings that are simply inserted into the frame are on the rise. This system offers advantages, but annoying cracking often occurs. Now "Praxis Works" presents a nerve saver and problem solver for the bottom bracket.

Gone are the days when the bottom bracket was firmly bolted into the frame. Press-fit standards are the order of the day for carbon and then aluminum frames: these allow the industrial bearings to be simply placed in the frame (and reduce production costs), but occasionally have to contend with manufacturing tolerances and therefore cracking.

In order to deal with these difficulties and the various standards such as BB30, PF30 or Specialized OSBB, the provider "Praxis Works" is sending practical adapters into the race. The supplier is not talking about an adapter, but rather a fully-fledged bearing shell that is permanently installed in the frame - and can be easily removed again. This allows cranks from Shimano, Sram GXP or Campagnolo Ultra Torque to fit into frames for the BB30, PF30 or Specialized OSBB systems.

During assembly, the longer shell on the non-drive side is pressed into the frame and the shell on the drive side is screwed onto it. Thanks to the patented Praxis Collet system, the conversion bottom bracket expands to a precisely defined limit and presses itself into the frame with even pressure. In contrast to the previous system, there is no possibility of the bearings working their way out of the frame or sitting crookedly in it. There is also a compressible O-ring under the collar on the non-drive side to compensate for width tolerances in the frame.

This significantly reduces the chance of cracking or other annoying noises in the bottom bracket area when pedaling. Also interesting: high-quality Enduro Bearings are used for the bearings.

The bottom bracket problem solver from "Praxis Works" is now available from the Swiss distributor and parts manufacturer Indian Summer. Numerous other parts from "Praxis Works" are also available from its warehouse in Au, Zurich. Everything revolves around the drivetrain, including an 11-40 10-speed cassette, a BSA bottom bracket for Shimano Hollowtech II cranks, a 1x MTB crank and a 2x road bike crank, as well as other assembly tools and accessories.

Behind "Praxis Works" is bike industry veteran Dave Earle, who has already gained a lot of experience in the development departments of Bontrager Cycles, Specialized and Santa Cruz, among others. Founded in 2007, the company is headquartered in Santa Cruz, California, and has offices in Taiwan, with Dragon Manufacturing in Taiwan responsible for parts production.

www.praxiscycles.com