Cobra Minisumo Wheels are top-quality competition wheels. - The fiberglass-infused nylon hubs are designed with a ring of captive holes for locking the tire tread in place. - Tire tread composed of Shore A20 polyurethane makes these the highest traction wheels you can buy. - The wheel is designed to envelop a 16mm gearbox. Perfect where length is a concern. ( Forceup motors with these wheels will fit into the 10cm width limit of minisumo events.) - An extra-long setscrew allows you to easily tighten the wheels onto a 3mm motor shaft. - Setscrew is accessed through tire.
Specifications: Hub material: Fiberglass-reinforced nylon - "lock channels" ensure the tread can't peel off the hub Tire material: Shore A20 polyurethane, professionally vacuum-degassed Coefficient of Friction (against smooth unpainted MDF wood): μ=1.75 (Silicone μ=1.30, Rubber μ=1.05) Diameter: 3.00cm (1.18") Width: 2.16cm (0.85") Inner diameter: 1.76cm (0.688") Shaft bore: 3mm (0.118") - you can easily drill the bore for larger motor shafts Weight: 12.6grams each (0.44oz) - light wheels mean you can add more weight to the bottom of your chassis; below the bot's center of gravity where it should be!
Tip: Clean the tires with isopropyl alcohol wipes before each match for optimal traction.