Race Tech Fork Springs Honda Crf250R / RX / Crf450R / RX The first step to great handling is selecting proper spring rates front and rear. With over 900 Hi-Performance Spring designs, Race Tech is almost guaranteed to have what you need. Through years of testing and manufacturing experience, Race Tech has developed a full line of Hi-Performance Springs using the finest materials and processes. RT Springs have the highest stiffness-to-mass ratio in the industry making them extremely light weight for their particular rate. Features: Accurate rates to within 2 Accuracy and performance 100 tested Straight rate Chrome silicone High stiffness to mass ratio Shot-peened Heat treated Pre-set