Reinforced Hyper Idler Shaft axle - GRK5-R

TheR31S128 Hyper Idler Shaft fromR31 House is a reinforced idler shaft designed specifically for the transmissions of theGRK5-R / GRK-R motor unit.

Developed to withstand the high stresses of modern drift, this shaft features aspecial surface treatment (reinforced coating) that significantly increaseswear resistance anddurability.

In a transmission, the idler shaft plays a key role indrivetrain smoothness and torque transfer. A reinforced version helps reduce play, improve mechanical consistency, and prevent efficiency losses under load.

This model has already proven itself in competition, notably in theSDC (Super Drift Championship), where it contributed to winning performances.

• Brand:R31 House

• Reference:R31S128

• Type: idler shaft (reinforced idler shaft)

• Compatible with:GRK5-R / GRK-R motor unit

• Treatment:special anti-wear coating

• High mechanical strength

• Improved drivetrain durability

• Used in competition (SDC)

• 1 × reinforced idler shaft

👉 An often underestimated but essential part:

• reducesplay in the drivetrain

• improvestorque consistency

• limits wear during intensive runs