The 55 lb spring (green) will come installed from the factory. The 55 lb spring is ideal for a 160 - 200 lb rider.

35-45-55-65 lbs/in springs are available on our Parts and Accessories Page

35 lb spring - 90 to 120 lb rider

45 lb spring - 120 to 160 lb rider

65 lb spring - 200 to 240 lb rider