Robert Axle Project Resistance Trainer 12mm Thru Axle Length 154 167mm Thread 1.0mmRobert Axle Project Resistance Trainer 12mm Thru Axle Length: 154 or 167mm Thread: 1. 0mm. Robert Axle Project thru axles allow modern frames to be used with axle mount trainers. For use with bike trainers such as 1up Blackburn Cyclops Kinetic Tacx and more IMPORTANT: Before ordering make sure your specific trainer will accommodate the width of the thru axle equipped bike that you are using Measure trainer at the widest setting and measure the bike