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5 Stack Height 11 Upper Cup 56mm Material 7075-T6 Aluminum Crown Race Diameter 40mm SHIS Lower ZS56/40 SHIS Upper ZS56/28
Hand Friendly Soft Ends - Reinforced for Added Durability
Forged hollow SCM4130 chromoly spindle
Each bottom bracket is hand assembled with a chromoly spindle sealed bearings forged and CNC-machined alloy cups and a composite center spacer/seal
model Scramjet spindle interface 24mm shell BSA shell ID 33
Aima Big Sur Sport 20" Color:Black 5 Stack Height 11 UpperEverything you love about the original Big Sur is back! Now sporting 20" x 4" fat tires, Big Sur Sport is smaller and lighter, but it's just as fun and performant as Big Sur 26", if not more so! This bike retains the original's class 2 3 rating (20mph and 28mph top speed using the throttle and PAS respectively), as well as its safety features, including big 203mm brake rotors, LG 21700 battery cells, and a full UL2849 certification. Equipped standard
