Use a front/rear set or match the front with Sturmey 3sp fixed rear or 2sp kickback rear \n 6061 aluminum shell with sealed cartridge bearing and solid nutted axle (145mm front/175mm rear overall axle length) \n Rear is flipflop threaded for freewheel one side, track cog/lockring opposite side\n Stock rear spacing is 130mm OL, convert to 120mm by removing 5mm spacer behind locknuts on each side