Never mind. I just had the genius idea to go onto ksports website and check it out myself. They're 291f/280r. I think it's a little on the soft side for the front. I've used 275lb 8 inch springs up front before. There was too much dive in transitional breaking for any type of racing rubber. Only on squishy sidewall street tires was this an appropriate spring rate. It made for too much throttle lift oversteer since the inside rear wheel was always way up in the air. 450-550 lbs is a really good choice for up front.