Currie Technologies 15 tooth pinion gear & roller clutch assembly. The most common gear one Currie scooters is a 15 tooth freewheel sprocket. This is stock for most GT, Schwinn, Izip, Mongoose & all Currie Electric Scooters. Currently the stock gearing on Schwinn, GT, Mongoose & Izip scooters range from an 11t, 12t, or 15-tooth gear. The item pictured INCLUDES the 12mm SHAFT ADAPTER with PIN. You need to select from the drop down if you do not want it. 15 Tooth Freewheeling Sprocket For #25 Chain Roller clutch with one-way bearing. Rotates freely in one direction; fixed in other direction. This 15 tooth freewheel sprocket fits 8mm shaft with 10mm collar and has a 3mm hole for retention pin. Freewheel rotates freely in one direction and is fixed in the other direction. Includes retention pin. Dimensions Outer Diameter: 1-5/16'' / 33mm Inner Collar Diameter: 3/8'' / 10mm Inner Diameter: 5/16'' / 8mm Upgrading your scooter.....Change your stock 15-tooth gear for a 19-tooth pinion to increase your top end by 3-4 MPH, or change your 11tooth to a 15tooth Free Wheeling Speed machine! sk-15tpStatus: Unavailable Home | New Arrivals | Hover Boards | Quadcopters | Electric Scooters | Electric Bikes| Razor Scooter Parts | Scooter Parts | PS4 | Xbox ONE | iWatches / Gadgets | Shipping | FAQ | About Us | Scooter Laws | Returns | Shopping Cart