Surpass V4S/V5R Stock Option Rotor 12.3mm
SPV4S808ROT-OPAn option Rotor for the popular Surpass V4S/V5R Motor, 12.3mm means increased RPM which would be especially useful at some tracks. This is the BRCA and EFRA Approved optional rotor for the 10.5, 13.5, 17.5 and 21.5 V4S/V5R Stock motors.