Ultimate Racing Compak 4 Pro Clutch Springs B11 (4pcs)

Ultimate Racing Steel Compak 4 Clutch Springs UR0642-B11

Fine-tune your clutch engagement with the Ultimate Racing Steel Compak 4 Clutch Springs. Designed for RC racers who demand consistent clutch performance, these replacement springs help optimize clutch engagement to suit track conditions and driving style.

The B11 spring configuration features a stiff 1.1 mm spring rate, designed for high-traction track conditions and muddy surfaces. Stiffer clutch springs engage at higher engine RPM, giving racers greater control over how power is delivered to the drivetrain.

Ideal for competitive nitro RC racing, these springs are a useful replacement or tuning option for maintaining consistent clutch performance throughout practice and race day.

Product Features:

• Genuine Ultimate Racing replacement clutch springs

• B11 spring specification

• 1.1 mm spring diameter

• Designed for high-traction or muddy track conditions

• Helps tune clutch engagement RPM

• Steel construction for dependable racing use

• Part Number: UR0642-B11

Choose Ultimate Racing clutch components from BeachRC to keep your RC race program performing at its best.

Fitment Note: Verify compatibility with your specific Ultimate Racing Compak 4 clutch assembly before ordering.