GPM Racing 20CRMNTI Steel Spur Gear 29T (M1.5) for Arrma 1/5 Kraton 8S (MAKX029TS)

MAKX029TS Hardened Spur Gear Details

This aftermarket spur gear set is offered as a direct-fit replacement for ARRMA Kraton 8S platforms, model MAKX029TS. The 29T and 30T gears are manufactured from 20CrMnTi steel and cut to a 1.5Mod pitch to match factory items ARA310920 and ARA311051.

Designed role: built for high-output 8S Kraton variants where a hardened steel spur helps resist wear under heavy load. The gears are intended as the main driven gear in RC drivetrains.

Installation guidance: confirm 1.5Mod pinion compatibility, set correct axial alignment and backlash before use, and re-tighten mounting hardware after the first run to maintain proper mesh without gearbox modification.

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)

The MAKX029TS 29T/30T spur set provides a hardened 1.5Mod steel option for Kraton 8S drivetrains where increased durability and correct sizing are needed for reliable performance.

How do I confirm the correct 1.5Mod pinion match?

Measure your existing pinion module or consult its specification; the MAKX029TS spurs require a 1.5Mod pinion for accurate engagement.

What inspections should be done after the first installation run?

After the initial run, re-check backlash, confirm even tooth contact across the spur, and ensure mounting screws remain tight to preserve gear life.

Can these spurs be used with stock gearbox components?

Yes. They are designed as direct replacements and should work with the stock gearbox when the pinion module and alignment are correct.

Which factory parts do these replace?

The MAKX029TS spurs are sized to replace factory part numbers ARA310920 and ARA311051 when installed on compatible Kraton 8S models. 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.