►For size 3.00-4, 4.00-4, 2.80/2.50-4, 4.10/3.50-4 tires
►Material: iron & aluminum
►R-300-4.1(F) Hub Size: Ф15*38mm (front wheel)
►R-300-4.1(R) Hub Size: Ф17*38*5(6)mm (real wheel)
►Key Sizes: 5 mm & 6 mm available
