【 9/16\" Spindle Bike Pedal 】 The pedals are 9/16\" spindle, please measure your bike before purchase. If your bike has a single piece crank, the pedal size is 1/2\". If its a 3 piece crank (most bikes) then it\'s 9/16\". The best way is to take pedals and go to a local hardware store and ask a salesperson to help you find out what size it is. 【 16 ANTI-SKID NAILS 】 Double-sided 16 anti-skid nails on the surface of road bike pedals, provide enough friction and adhesion force to prevent from skidding. 16 anti-skid nails to grip your shoes securely. 【 STURDY & DURABLE 】 The mountain bike pedals use high-strength aluminum alloy material to make the pedals feature lighter weight and durability at the meantime. Stable X-shaped Structure design to make pedal more sturdy. 【 SEALED DESIGN 】 The platform pedals spindle was completed sealed to prevents water and dust from entering. Offering best protection for the interior and effectively prolonging the lifespan of the bicycle pedal. 【 WIDEN PLATFORM PEDALS & LIGHTWEIGHT 】 3.35\" widen platform pedal and 0.44 LB ultralight ergonomic design pedals for long cycling comfort and improve pedaling efficiency. These universal pedals use standard 9/16 inch screw thread. Perfect fit for most bikes like BMX Bike, MTB Bike, Cruisers Bicycle, Diamondback Bicycles, Folding Bike, Road Bike, Track Bike Unicycle, Urban Bike etc.