C-XB4'25-RL Steel Rear CVD Left Thread Set ( For Xray XB4'26/25/24/23/22 &Xray XB2'25/24/23/22 )

Made of high-quality steel and hardened by heat treatment.

Dual-direction thread design. Left-side reverse-thread drive shaft prevents nut loosening.

Enhanced power transfer, snappier startup response, better efficiency and top speed.