Gates GT4 Primary Belt Ultra Bee 640-8MR-25

The PowerGrip™ GT4™ features a robust high-torque synchronous design and optimized tooth shape to maintain proper clearance to the flanged pulleys found on Sur Ron and Segway e-bikes. No other belt on the market is engineered so precisely for our specific e-bikes. Replacing your stock belt with a Gates® PowerGrip™ GT4™ after it breaks – or better yet, before it breaks – is one of the best investments you can make in your bike, bar none. This is a direct replacement for your Ultra Bee to get you back on the Trails shredding for days. These belts are long-lasting upgrades capable of high-power builds. Features OEM replacement upgrade for Sur Ron Ultra Bee Make belt changes a rarity with the Gates® PowerGrip™ GT4™ belt High-torque synchronous belt for less friction, longer lifespan Ethylene elastomer construction for enhanced durability Manufactured in the USA Designed jointly by GritShift R&D and the experts at Gates® Part Number 640-8mr-25 Fitment Sur Ron Ultra Bee