Diameter: 31.2Mm. Width: 11.2Mm. Required Motor: 1/8 Inch Axle. Weight: 12.2 Grams. Sold Individually. The Solarbotics Rw2 - Large Rubber Wheel Features A Beautifully Machined Aluminum Hub With A Generously Thick Rubber Tire For Maximum Traction. A Nice, Fat, Beefy Wheel Ideal For Small Robots! Secure It To Your Motor Shaft With The Included 4-40 Hex Set Screw. As This Wheel Is Drilled For A 1/8 Inch Axle, Mounting It On Our Gm6/7 Gear Motor (A 2.1Mm Shaft) Will Not Quite Give You A True-Running Wheel. You Will Need To Create A Spacer Sleeve To Make Up The Difference To Make It Spin True. Splitting An 1/8 Inch Brass Tubing As A Spacer Does A Great Job Of Shimming It Up While Allowing The Set-Screw To Still Seat Into The Gear Motor Steel Shaft.
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