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Dura-Ace® BB9000
It works with 4-bolt
Seat Post Clamp Alloy
The ATAC DH 4 is a downhiller's dream featuring an aluminum body and oversized hollow steel axle
This straight seat post has a 5/8" top and will fit many old school Schwinn bikes and some odd BMX bikes
20" (451mm) Alienation TCS Mite G69 Rim - 28H - Black 3 Dura-Ace® BB9000Constructed from 6069 T6 aluminum, the Mite provides superior strength compared to traditional rims made of 6061 alloy (with a 30% increase in tensile strength compared to 6061 T6). It also features a double wall design with a sleeved joint for added durability. A nylon rim strip is included. Use: BMX Race Mini Junior Size: 20" (ISO 451mm: 20 x 1 1 8" or 1 3 8") Wall: Double Drilling: 28H Valve: PV Internal Rim Width: 17mmExternal Rim Width: 21mmRim