Evolve Wheel Drive Gears Replacement wheel pulley for Evolve Skateboards all terrain and street kits. Wheel pulley bearing not included. Price is for one pulley With the option of 32T and 38T for street boards and 47T and 66T for all terrain boards. Supercarve 2 gears are compatible with Evolve Supergrip 97mm wheels. All Terrain Gears With the option of 47T and 66T for all terrain boards, you can get just the right set up to suit you and your board. Standard Set Ups 66T Drive Gear for GT-001 Belt (7" Tyres) 47T Drive Gear for GT-006 Belt (6" Tyres) Compatibility Surge / 66T (Hadean and GTR2) Relay / 66T (GTR1 and GT) Relay / 47T (GTR1 and GT) SuperCarve 2 / Renegade / 66T (Renegade and Diablo) Please note the price is for one gear. 47t not suitable for 7" tyres. Street Gears With the option of 32t and 38t for street boards, you can get just the right set up to suit you and your board. Drive Gear Difference: A smaller wheel or bigger gear will offer more torque. A bigger wheel or smaller gear will increase top speed. A smaller gear paired with a bigger wheel will offer low torque and a higher top speed. A larger gear paired with a smaller wheel will offer high torque and a lower top speed. Belt Compatibility: 32T is for the GT-003 Belts (standard setup for all skateboards) 38T is for the GT-004 Belts *Please note the price is for one gear.