Blackburn Trainer Axle Adaptor Kit M12 X 1.0MM & M12 X 1.75MM drumbeat21-616 The Imperials Synchwire upper features

The Imperials Synchwire upper features dual boa ip1 buckles and soft lace guides

gloves or extra calories to get you through long base miles

fit system with pinch-guard buckle provides an easy way to fit your kid's helmet quickly and securely

Polycarbonate shell

It's made with our handy Acu Dial system for a comfortable

Blackburn Trainer Axle Adaptor Kit M12 X 1.0MM & M12 X 1.75MM drumbeat21-616 The Imperials Synchwire upper featuresTRAINER AND TRAILER ADAPTER KIT 1. 75MM Our thru axle conversion kit can replace the original thru axle on most mountain bikes, to allow for trainer usage. This kit will also allow the installation of a Copilot trainer hitch for most thru axle bikes as well. Works on bikes with 1. 0 OR 1. 75 thread pitches, and hub widths from 135 148mm. HOW TO CHOOSE Choosing the correct axle is simple. First, research which axle spacing your bike utilizes (135, 142