First ISIS Bottom Bracket

First ISIS Bottom Bracket 

The First ISIS bottom bracket is the perfect choice for bike trials frames threaded bottom bracket (such as the Jitsie Varial, Comas Entry, Play KN, and many others), offering maximum compatibility, durability, and smooth rotation under the most demanding conditions.

Features

• New First ISIS-type bottom bracket, designed to deliver optimal performance for trials and mountain bikes.
• Body and cups made from precision-machined aluminium, combining light weight and corrosion resistance.
• Standard 1.37” x 25T thread, compatible with most trials and mountain bike frames on the market.
• Hollow steel axle with ISIS system and M15 thread, reducing weight to a minimum without sacrificing durability or stiffness.
• High-quality, replaceable sealed bearings ensure smooth rotation and prolong the bottom bracket’s service life.
• Suitable for 68 mm standard bottom bracket shells.
• Available in two axle lengths: 122 mm or 128 mm, to suit different chainline setups depending on use.

Measurements

• Shell width: 68 mm.
• Axle length: 122 mm or 128 mm.
• Includes M15 steel bolts for a secure and reliable installation.

Finishes

• Black with silver cups.

Weight:

• 279 g (122 mm) and 289 g (128 mm) +46 g for the included bolts.