Cane Creek 40-Series Steel 52/30 Conversion Crown Race 1.5˝ to 1-1/8˝ Default:Default the Trek Round Alloy Seatmast

the Trek Round Alloy Seatmast Cap is an essential upgrade for enhancing your bike's performance and comfort

robust fit

Weight: 865 g

smooth braking feel

Original equipment replacement fit pads for your Bontrager Circuit Mips helmet

Cane Creek 40-Series Steel 52/30 Conversion Crown Race 1.5˝ to 1-1/8˝ Default:Default the Trek Round Alloy SeatmastCrown races for Cane Creek headsets fit a variety of lowers and crown race seat diameters. Key Features Compatible with 10 , 40 and 110 Series headsets and backwards compatible with S and XX Series Integral mold seals keep out the elements Compatible with 52mm lower headset bearings Compatible with 30mm (1 1 8") straight steerer tubes Durable steel construction Allows the installation of a straight steerer fork without changing out the headset lower