Screw On 11-28T/11-34T Drift Maniac 7 Speed Freewheel For E-Bike. Product Features 7cogs dnp freewheel, teeth numbers:11-13-15-18-21-24-28.Compatible with e-bike conversion, fat bike, cargo bike, city bike, commuting bike. Electric bike specific 7 Speed freewheel,Made of high strength and durable chromoly Steel. Nickel plated surface treatment. Total height: 37.1mm+/-0.1mm, Weight:485g+/-1g,hot roller steel cogs(sprockets) + 3 layer nickel plated, chrome-molybdenum steel clutch mechanism Designed for E-bike, ratchet mechanism is high strength and durable, able to withstand the torque generated from the electric motor. Fits standard motorized rear hub with threaded freewheel mount, compatible also with standard threaded bicycle freewheel hub.Remove with DNP freewheel removal tool, 12 splines, 22.6mm outer diameter.Hub thread type B1.37??24tpi, hub offset should not less than 37mm. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!