`- Zwift users rejoice, the perfect solution for modern thru-axle bikes and modern bike trainers\n- Axle trainer attachments are removable so the trainer axle can be used on or off the trainer. Excellent for warm-up applications\n- No special tools required for installation and removal, a simple 5mm hex key \n- Machined to the high standards in the industry \n- Use The Robert Axle Finder (below) to find the right axle \n- When multiple axle lengths are listed, the axle includes one or two spacers. The different lengths are with and without the spacers\n- Designed, tested and made in Bend Oregon