XRAY presents yet another way to fine-tune your T2- or T3-based car with new 4.9mm Quick Roll Center™ holders. This matched pair of CNC-machined high-grade aluminum holders — marked H1 and H2 – are 1mm higher with the same length than L1 + L2 (lower) holders, allowing car to roll more. May be used at either front or rear.
 
 
Using the H roll-center holders in the front makes the car turn easier. Recommended for high-carpet traction tracks because it decreases in corner steering and helps to prevent traction rolling.

Using the H roll-center holders in the rear increases corner steering and speed