Clutch spring made from a thicker 2.0mm wire which is additionally grinded inside for perfect fit on the Centax Clutch Nut. The spring is stiffer, to minimize any additional deformation during use. To further minimize this effect, the spring was pre-compressed as a part of the production process. The length and characteristics of the spring will remain consistent even after extended periods of use. Designed especially for 1/8 on-road Centax Clutch and 1/8 GT.