The replacement part can be perfectly fixed on the fixture of the fixed rear wheels, the turbocharged trainer Suitable for most indoor trainers bicycle rear wheels Standard rear fork size, general accessories, suitable for all the rear wheels with empty heart shafts Bicycle accessories of highway mountain cars or bicycle trainers is fixed in the column shape of the trainer Replacement to secure perfectly into the clamps holding the cycle rear wheel to the turbo trainer,Bike Accessories for Road Mountain Bike or Bike Trainer Specially profiled to secure into trainer-cylindrical shape Color: Silver Material: Steel Package Contents: 4 x Quick Release Rear Wheel Skewers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.