Hiboy Rear Wheel S2 Pro/KS4 Pro

Hiboy Mechanical Brake Lever for S2 Max KS4 and KS4 Pro

Hiboy S2 / S2 Pro / S2 Lite/ S2 Max / KS4 / KS4 Pro Folding Mechanism

Hiboy S2 MAX motor nut cover (left and right set)

Hiboy S2 Rear Fender

Hiboy Battery for S2 Pro/ KS4 Pro

Hiboy Dashboard for S2 MAX

Hiboy rear tire with motor for S2 MAX (including outer tube and inner tube)

Hiboy Controller for S2（New version）

Hiboy Battery for S2/KS4

Hiboy S2 Motor