Standard Conventional Rear Spring - 10" Length | 5" OD | 375lbs/inchSwift conventional springs are mainly utilized in motorsports ranging anywhere from dirt to pavement where we've engineered for corner specific with our HS5. TW proprietary material, providing the optimal spring design to maximize your vehicle potential amplifying every advantage. The 5" OD Rear Springs are designed for CARS Tour, Late Model & Pro Late Model that's quicker to load with 1. 5" coil spacing and excellent for spring rubbers!