11-28T/11-34T Screw On Drift Maniac 7 Speed Freewheel For E-Bike. Product Details 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. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.