Jitsie ISIS Bottom Bracket

• sealed cartridge bearings for longevity and smooth rotation
• alloy cups and body to reduce weight without sacrificing stiffness
• standard 1.37″ × 24 TPI threading (Euro / BSA style) — fits most trials frames
• 118mm bottom bracket uses a chromoly steel M15 spindle suitable for 68mm wide bottom bracket shells and comes with steel M15 bolts for secure installation
• 128mm bottom bracket uses a chromoly steel M12 spindle, fits both 68mm and 73mm wide bottom bracket shells and is supplied with steel M12 bolts for secure installation plus a 2.5mm spacer to use with a 68mm wide bottom bracket shell

The Jitsie ISIS bottom bracket is built for trials riders who demand durability, smooth rotation, and strength under abuse. Featuring a chromoly steel spindle and sealed cartridge bearings, it delivers reliable performance in all conditions. The alloy cups and body reduce weight while retaining rigidity, and the 1.37″×24 TPI thread makes it compatible with most trials frames. Supplied with steel bolts, this bottom bracket is a go-to upgrade or replacement for competitive riders.

Available in two axle lengths (118mm and 128mm), it adapts to different crank and frame setups.

• 118mm – 276g
• 128mm – 360g

• 118mm – Varial 20″ 920/970/1010mm
• 128mm – Varial 24/26″