●Allows you to connect bikes with 12mm thru axles to the Coho XC trailer ●Quick and easy to install ●Durable construction ●The Coho Thru axle is required for any bike with a 12mm rear axle to connect to the Coho XC. Stock axles are not compatible with the Coho XC clutch system. ●If you are not sure about the correct skewer length, please contact the manufacturer of your bike or your local bike shop before purchasing a Burley Coho Thru axle.