Topeak MTX BeamRack II Seatpost Mount Rack - A-Type Small Frames MFPN=11A00801 5Lockout Switch Shock Mounted SwitchMetric

5Lockout Switch Shock Mounted SwitchMetric YesEyelet Diameter (mm) 12

Top-of-the-line rear derailleur with generous use of carbon fiber and titanium for maximum performance at minimal weight

Color Black Rise 30 Material Aluminum Upsweep 5 Defined Color Black Back Sweep (deg) 7 Weight 305 Bar Clamp Diameter (mm) 35

Brake Type Disc Color Blue Defined Color Blue Fork Type Suspension Frame Material Aluminum Frame Type Rigid Front Axle 15mm Thru x 110mm Mfg Size X-Large Rear Axle 12mm Thru x 148mm TT (Effective) 659

ISIS is a splined interface bottom bracket/crank design used by Truvativ FSA Raceface and other brands

Topeak MTX BeamRack II Seatpost Mount Rack - A-Type Small Frames MFPN=11A00801 5Lockout Switch Shock Mounted SwitchMetricTopeak MTXS BeamRack II Seatpost Mount Rack A Type Small Frames. The Topeak Beam Seatpost Mount Rack carries up to 20lbs and comes in three variations to cover different frame sizes. The quick release clamp allows for easy removal for weekend rides. Fits 25. 4 31. 8 mm seat posts Tough 6061 T6 aluminum construction Hinged seat post clamp with aluminum quick release lever Perfect for mountain and trekking bikes Carries 20 lbs and loads with ease