Machined from heat-treated, gear-quality steel in the USA by Andrews. Available in stock size 32 tooth, the smaller 31 tooth pulley increases acceleration, while the 34 tooth gear gives a higher top speed at less RPM. Installation of non-stock size pulleys usually requires the use of a longer or shorter final drive belt. Fits 2017 to present Milwaukee Eight Touring & Trike and 2018 to present Milwaukee Eight Softail.