DirtyBike Ultra Bee Large Sprocket and Chain Kit

Acceleration + Efficiency Upgrade with 520 X-Ring Chain and Steel Sprockets

Upgrade your Sur-Ron Ultra Bee drivetrain with a stronger, more efficient sprocket and chain setup built for real off-road riding. The DirtyBike Large Sprocket and Chain Kit combines our proven 520 X-Ring chain with durable steel sprockets to improve low-end torque, throttle response, and acceleration while maintaining balanced performance for trail, woods, and race conditions.

Increasing rear sprocket size gives the Ultra Bee more pull off the bottom, making it easier to climb, launch out of corners, and maintain control in technical terrain. It is a simple, effective upgrade for riders who want more usable power where it matters most.

Larger rear sprockets do slightly reduce top speed, and the larger the sprocket size, the greater the reduction. For most off-road riders, the tradeoff is worth it: better acceleration, stronger low-speed control, and improved performance in technical terrain.

The sprockets are manufactured from long-lasting, zinc-coated steel for excellent durability in aggressive riding conditions. Precision-cut, beveled teeth promote smooth chain engagement, helping reduce friction, drivetrain wear, and power loss.

Features

• Designed for the Sur-Ron Ultra Bee
• Improves low-end torque and acceleration
• Helps deliver stronger, more responsive off-road performance
• Slightly reduces top speed depending on rear sprocket size
• Larger rear sprockets provide more acceleration with greater top speed reduction
• Includes heavy-duty 520 X-Ring chain
• Durable zinc-coated steel sprockets
• Precision-cut teeth with beveled edges for smooth chain engagement
• Built for trail, woods, hard enduro, and race use
• Simple drivetrain upgrade with noticeable performance gains

Pick up a DirtyBike Laser Chain Alignment Tool to ensure your chain is properly aligned for maximum performance.