HPI Heavy Duty Spur Gear 45Tx5mm

The HPI Heavy Duty Spur Gear 45T x 5mm (HPI-114589) is a durable metal gear designed to help fine-tune drivetrain gearing. Suggested compatibility includes the HPI Savage XL Octane. Use this 45T spur (45Tx5mm) to balance acceleration and top speed to suit your surface and driving style.

Tuning Guidance

• More teeth on the clutch bell (or fewer on the spur) increase top speed with slightly reduced acceleration – ideal for smooth surfaces or longer straights.
• Fewer teeth on the clutch bell (or more on the spur) improve acceleration and torque with slightly less top speed – ideal for rough terrain and steep hills.

Available Sizes

• #108960 – Clutch Bell 14T x 33 x 20mm (Standard)
• #108962 – Clutch Bell 15T x 33 x 20mm
• #114587 – Heavy Duty Spur Gear 43T x 5mm
• #114589 – Heavy Duty Spur Gear 45T x 5mm
• #111800 – Heavy Duty Spur Gear 47T x 5mm (Standard)