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.This adapter kit is required to mount bikes with a 12 mm thru axle to Tacx Neo or Flux trainers with a type 1 axle. It includes threaded inserts for thru axles with a 1.0 mm, 1.5 mm or 1.75 mm thread pitch. Consult your bicycle manufacturer for thru axle specifications. Garmin Trainer Axles and QR Trainer Part EAN: 8714895070001