Choose from 34.9mm, 31.8mm, 29.8mm or 28.6mm seat tube frame diameter
- Adds rack mounts to bikes without upper strut brazons
- Forged aluminum.
- Replaces stock seatpost collar found on most bikes.
- Clamp design minimizes stress on frames and seatposts.
- Creates two 5mm upper rack eyelets on almost any frame