XRAY 368277 55mm Rear Progressive Springs 2 Dots Race Tune  [XR-368277]

Rear Spring Upgrade for NT1 Using XRAY 368277

The XRAY 368277 progressive rear springs are tuned to balance traction and stability on NT1 chassis. Their progressive profile softens initial travel for grip and increases resistance as the car loads, helping keep the rear stable at speed.

Variable Rate Design for Better Cornering

At 55mm with an open end these springs start more compliant and increase rate as displacement grows. That change in rate helps the car rotate into the corner and resist excessive roll when leaned over.

Carefully Matched for Even Performance

Each spring is manually measured and paired to match length and response, giving repeatable behavior lap after lap. Laser stripes make it straightforward to identify spring rate when setting up or swapping parts trackside.