SR SERIES PRO castors from DR. PULLEY - special castor shape for more range in acceleration and top speed.

Thanks to their special shape, the SR castors in the SERIES PRO range from DR. PULLEY extend the range of the "shifting process" upwards and downwards. With the right set of SR wheels, both better acceleration values and higher top speeds can be achieved without having to switch between a setup for acceleration and a setup for top speed, as is often the case with conventional round vario wheels.

These wheels are particularly popular in scooter scenes in the USA and parts of Asia, such as Hong Kong, Taiwan and Japan.

Caution: The weight of the standard castors used to date cannot be transferred 1:1 to SR castors. A precise adjustment in the range of ± 1.0 g is required. It is also advisable to adjust the Variomatic Spring. If the rollers are selected too heavy, this can improve top speed, but the Belt can then rub against the Crankcase. Therefore, tune precisely.