Pololu Wheel for Standard Servo Splines (25T, 5.8mm) - 90×10mm, Black, 2-Pack

These black plastic wheels have silicone tires and measure 90 mm (3.54?) in diameter. They mount onto standard servo splines with 25 teeth and a 5.8 mm diameter, such as the splines on FEETECH?s FS5106R, Power HD?s AR-3606HB, and SpringRC?s SM-S4303R continuous rotation servos. This product is a pair of wheels.