Internal Assembled Semi Cartridge (I.A.S.C) Bottom bracket system allows for 22mm axles in Euro (BSA) type threaded BB shells.
Compatible with BMX type most other similar sliding 22mm axle crank systems.
The patent pending Gusset I.A.S.C bottom bracket system installs easily with a UN type tool to give optimised bearing adjustment and additionally forms an effective dirt and water internal shield.
The I.A.S.C system is also fully serviceable and also allows easy replacement of the individual Industrial cartridge bearings as required.
- Forged Cr-Mo UN style steel BB cups.
- Variable, sliding chainline.
- 4 replaceable industrial cartridge bearings.
- A.S.C System optimised bearing adjustment.
- Weight: 246g (inc. spacers)
Note: smaller bearings are used compared to IASC 19mm BB, and thus bearing durability is reduced