SUBSCRIBE The evolution of road bikes may have provided cyclists with frames that are lighter, stiffer and more aerodynamic, but there has also been a substantial increase in the number of bottom bracket and crank axle designs. The once ubiquitous threaded bottom bracket shell has given way to larger threadless designs while the diameter of crank axles has also grown. Both may have helped elevate the performance of contemporary road bikes but consumers have been left to contend with myriad options and some frustrating incompatibilities. In this post, Matt Wikstrom updates his original article from with a look at the range of bottom bracket and crank axle designs that are found on the market today and discusses the details that are important for matching one to the other. When I started working as a mechanic in the mids, there were essentially two types of bottom brackets for road bikes, English- or Italian-threaded.
SRAM Ceramic GXP Bottom Bracket Review
Davy Sprocket specialise in custom bike builds where the finest custom details are all part of the pleasure of the build. Designed around a While many dismissed this as a major player trying to impose yet another standard, it was only a matter of time before third party manufacturers started releasing their own DUB compatible bottom brackets. C-BEAR pride themselves on providing bottom brackets to suit a wide array of standards, so it made sense that a DUB bottom bracket would soon be part of their offering. For MarathonMTB.
REVIEWED: C Bear DUB Ceramic Bottom Bracket
Wheels Manufacturing Inc. Wheels Mfg uses only Enduro bearings and silicone seals for the most durable and smoothest bottom brackets available. Fully serviceable. Low-friction dual seals protect the bearings from harmful contaminants, while sealed premium bearings are both serviceable and replaceable. Machined cups thread together for stability, increased bearing life, and simple installation and maintenance.
Overview Tech Specs Weight Reviews Description Part of the allure of SRAM's Red component group is that it's designed and made with a pull-out-all-the-stops attitude, and that insistence on lighter, faster, better goes all the way to the bottom bracket. It's structurally identical to the Team GXP bottom bracket used in the Force group, except the Blackbox Ceramic GXP uses silicon nitride ceramic balls in the sealed cartridge bearings instead of the less expensive and significantly less round steel balls. This greater roundness and superior hardness substantially reduces the mechanical drag of the bottom bracket as the crankarm spindle rotates through it.