Ride Eng.'s new longer billet pull rods are a key ingredient to balancing out the new 2017-18 suspension, increasing traction on acceleration utilizing all the travel and improving handling. There is added confidence to ride aggressively. Works equally well on the 2018-21 CRF250R. Recommended sag with the Rideng Pull Rods is 102-105mm. NOTE: These pull rods can also be used on the CRF450L for taller riders looking primarily for performance improvements in handling and balance. These only lower the bike 6mm (1/4"). Recommended sag is 100-102mm with the forks lowered 2-3mm (5mm from flush).