The �hlins Demo Springs set the new benchmark for spring rate accuracy. Developed in tandem with the moto legends at �hlins, these springs complement the proprietary TTX shock absorber system in order to provide gold standard in grip, control, and bump absorbance. Please note that this product only fits the �hlins TTX shock absorber.Precise spring rates are broken down to 4 N/mm (23 lbs./in), with max tolerance of 1.5%.Ultra-fine spring rates ensure the perfect spring rate across all weights. This guarantees optimal performance for any setup. *Please note that springs are sold separate of the shock absorbers.