Pololu 1090 wheels 42 x 19mm pair pololu 1090 a set of white plastic wheels with rubber tyres the wheels will press fit onto the 3mm d shafts on motors teeth on the hub optionally allow a reflectance sensor to be used for encoder feedback br br these brackets are just one of the many b pololu b accessories carried by b rapid b br br for further resources please see a href http www pololu com product 1090 here a pololu 1090 wheels 42x19mm pair