24 piece wheel kit for any of the e-moto style bikes, like the Surron, Talaria, 79 Bike, Segway, etc. Fitment:-20mm bolts are seen on most 203mm rotors that come OEM on most e-moto bikes.-20mm bolts are used for 220mm upgrade rotors with adapter brackets. In this case, there would be 4 bolts per wheel, (2 from caliper to adapter bracket, 2 from adapter bracket to wheel bracket) -20mm bolts are used on the E-Ride Pro with 220mm rotors. -30mm bolts are seen on the MX4 OEM. Uses a 10mm spacer. -30mm bolts are used with a spacer.  -30mm bolts may be seen on other style brakes.  Kit includes: Axle nut (1) Sprocket bolts (5) Front rotor bolts (6) Rear rotor (203mm) bolts (6) Caliper bolts (4) Brake pad screw/ pin (2) (Fits most OEM calipers, only one size offered) Anodized/ PVD coated to perfection Increased corrosion resistance Made from certified Titanium Grade 5 6AL-4V Rolled threads for greater fatigue strength Greater strength to weight ratio than steel 40% lighter in weight compared to OEM Exclusively sold at Titanium Surron and authorized retailers only