Hi mate mind came with a 18073-10 I'm 95kg kitted out would you swap springsIt comes default with the 18073-14 (for heavier riders) which should be close to good. Not sure on the exact calculations . I still ride the 14 since the 11 and 12 were out of stock long time. I'm 86kg, but it feels quite good on drops and jumps tbh. Have fun!