Ohlins factory replacement shock spring for the Ohlins TTX (and TTX GP) Panigale rear shocks. This is the OEM rear shock on the Paniagle 1199/1299 S / R models, or aftermarket Ohlins shocks for all Panigale (pre-V4) Models. Having a properly sprung shock is essential to unlocking the top performance potential of your shock! ** These springs are NOT compatible with the base model 1199 / 1299, 899, 959 Panigale Sachs rear shocks, choose Ohlins Shock Spring - Panigale Sachs for those applications ** Ducati Omaha Suggested Baseline Spring Rates: (+/- one rate based upon rider preference and riding conditions) (recommended Flat-rate linkage setting, if Progressive then go one rate lower) Spring Rate = Rider Weight (including riding gear)75 N/mm = < 165 lbs.80 N/mm = 165-185 lbs.85 N/mm = 185-205 lbs.90 N/mm = 205-225 lbs. (Stock spring rate on Panigale S / R TTX Shock)95 N/mm = 225-245 lbs.100 N/mm = >245 lbs.THESE ARE BASELINE RATES BASED UPON OUR EXPERIENCE WITH PANIGALE SETUP, PRIMARLY FOR TRACK BIKES. THIS IS NOT DESIGNED TO BE A DEFINITIVE GUIDE OR NUMBERS SET IN STONE, SUSPENSION SETUP IS AS MUCH ART AS IT IS SCIENCE SO IF YOU DISAGREE WITH THE RECOMMENDATIONS AND WANT TO CHOOSE A DIFFERENT RATE, GO FOR IT! IF YOU ARE RACING, PLEASE CONSULT WITH YOUR SUSPENSION TUNER OR CONTACT US FOR SPECIFIC RECOMMENDATIONS.