The Garmin Tacx Trainer Axles QR (Quick Release) are designed to make your bike compatible with Tacx trainers. These axles are essential for securely mounting bikes with different axle standards onto Tacx trainers, ensuring a stable and efficient indoor training experience.Use these quick releases to put a racing bike with disc brakes or a mountain bike with axle skewer in a Tacx direct drive trainer. Both axles are supplied with an adapter set so you can select the right combination for your bike. These axles are only suitable for the Tacx direct drives Garmin Trainer Axles and QR Trainer Part EAN: 8714895058931