GPM Racing 20CRMNTI Steel Spur Gear 47T (M1.0) for Arrma 1/5 Kraton 8S (MAKX047TS)

Precision 47T spur for ARRMA 1/5 vehicles

This replacement spur matches the factory 47T, module 1.0 geometry for ARRMA 1/5 Kraton and Outcast platforms while using 20CrMnTi steel to improve wear resistance under heavy loads. It serves as a direct-fit spare or a tougher upgrade for users running powerful brushless systems in RTR or roller formats.

Fitment checklist: clean the gearbox and inspect the original spur for debris, confirm the motor pinion matches the 1.0 module pitch and tooth count, and verify backlash after fitting. Preserve factory shims where appropriate and avoid overtightening screws to prevent bearing preload.

Operational note: upgrading to a high-strength steel spur reduces tooth wear risks in sustained high-load use but does not change gear ratio when the same 47T is retained; focus tuning on pinion size and slipper or ESC adjustments.

Packing includes

• Spur Gear 47T Mod 1.0 – 1pcs

Original Name / Part No:

ARA310920?ARA311051

Compatible Models

• ARRMA 1/5 Kraton 4X4 8S BLX Brushless Speed Monster Truck RTR-ARA110002 (Original Spur Gear 47T/M1.0)
• ARRMA 1/5 Outcast 4WD 8S BLX Stunt Truck RTR-ARA5810 (Original Spur Gear 47T/M1.0)
• ARRMA 1/5 Kraton 8S EXB 4X4 Roller Brushless Speed Truck-ARA5208 (Original Spur Gear 39T/M1.0 & 47T/M1.0)
• ARRMA 1/5 Kraton 4X4 8S BLX EXB Brushless Monster Truck RTR-ARA5808V2 (Original Spur Gear 47T/M1.0)
• ARRMA 1/5 Outcast 8S EXB 4X4 Roller Brushless Stunt Truck-ARA5210 (Original Spur Gear 39T/M1.0 & 47T/M1.0)
• ARRMA 1/5 Outcast 4X4 8S BLX EXB Brushless Stunt Truck RTR-ARA5810V2 (Original Spur Gear 47T/M1.0)

A straightforward replacement for those seeking an upgraded steel spur that retains factory dimensions while offering improved resistance to wear during heavy brushless operation.

Is this compatible with stock ARRMA pinions?

Yes, provided the pinion matches the 1.0 module pitch and the correct tooth count; verify fitment before extended use.

What are the main benefits of the steel material?

The 20CrMnTi material offers superior wear and fatigue resistance compared with standard stock materials, making it better suited to heavy-duty brushless applications.

How should I verify gear mesh after fitting?

After installation, rotate the drivetrain by hand to confirm smooth engagement across the teeth, then run a short low-speed test and recheck shim spacing to eliminate binding.

Will this change handling or noise levels?

A direct geometry replacement should keep handling consistent; noise may vary slightly due to material properties but should remain within normal drivetrain characteristics.

What routine checks extend spur life?

Regularly clean the gearbox, inspect gear teeth after gritty sessions, confirm mesh, and replace the spur when abnormal wear or damage appears. Write Product Review Please sign in your account before you can write any review. Sign In Close

Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.