Supermoto Kits Now Shipping! Works with ERide Pro, just swap rotors Are you looking to convert your Surron bike into a Supermoto road racing bike? Our bolt-on kit makes this transformation easy and can be done in your own garage. The kit includes a 42 tooth sprocket and a properly sized chain, so you can maintain the same top speed as the stock MX bike. The tires and wheels are designed for the Surron and feature CST 3 ply nylon tread, 2 motorcycle level tires DOT, and alloy DOT rims. Front tires measure 70x90x17, rear tires measure 90x80x17, front rims measure 17 x 160, rear rims measure 17 x 2.15. The kit also has the same hubs as the stock Surron; 20mm thru axle front and 15mm rear. And quality built wheels with strong 12 gauge stainless spokes and nickel plated brass nipples. With our Surron Supermoto conversion kit, you can easily transform your bike into a road-worthy Supermoto, complete with lower ground clearance and DOT tires for a completely different look than the knobby tires.