Both ends have 16 notches

Lens interchangeability: Yup

Standout Features: Gel padding plus a pressure-relief cutout can make a very comfortable saddle

3-level battery indicator

The steps between gears are optimized to give an even spread in gear ratios

Enduro BKSM-8142 Bottom Bracket Bearing Kit - MAXhit 440C Stainless Steel Bearing - BSA30 Ignore Wholesale Tier 2 Brand Rule Both ends have 16 notchesBKSM 8142 Maxhit, 440C stainless steel, BSA30 Bottom Bracket kit MAXhit is Enduros latest patent pending innovation; where the bearing is actually the component. MAXhit bottom bracket bearings are designed to thread directly into your bicycles bottom bracket shell, eliminating the need for the aluminum cups that are traditionally used to carry the bearings. This unique design frees up space for much larger balls that more than double the load capacity