TE-249-Mi9 Spring Steel Light Weight Rear BB Diff. Joint ( For Schumacher Mi9 & FT9) 2pcs. CNC Machined Delrin Rear Hub Insert ( Type B ) Precise fit: Designed for 21

Precise fit: Designed for 21 engine cylinders

Spring Steel Front Spool Cups has high strength and stability

*Tire/Foam hole puncher: Comes with a default 4mm hole diameter

*Precisely matches the shock system

TE-249-Mi9 Spring Steel Light Weight Rear BB Diff. Joint ( For Schumacher Mi9 & FT9) 2pcs. CNC Machined Delrin Rear Hub Insert ( Type B ) Precise fit: Designed for 21*Made of spring steel, it can repeatedly resist torque and impact during bumpy rides, reducing friction induced wear and tear; *Equipped with an O ring fixed locking pin, it prevents the differential cup from loosening at high speed and is easy to maintain; *Compatible with the original U8749, no grinding or adjustment required, and can be directly replaced.