Hot Racing progressive 33x160mm tuning springs for the TRA 6S and 8S. Progressive springs are soft at the top of the stroke to provide small bump and chatter sensitivity and ramp up in stiffness as the suspension compresses to resist bottoming out over large hits.

- Cold-coiled springs are designed to use with these progressive rates spring
- High quality spring steel construction
- Three progressive spring rates provide additional tuning options for the to optimize the suspension for any environment
- Two (2) red medium springs
- Two (2) blue stiff springs
- Two (2) black extra stiff springs - length: ~6.3in (160mm)
- Inner diameter: ~1.1 inch (29mm)
- Outer diameter: ~1.3 inch (33mm)
- Red spring: 2.5x33x160mm progressive
- Blue spring: 2.6x33x160mm progressive
- Black spring: 2.8x33x160mm progressive- Not compatible with dual spring shock setups

description revised by: SN May 21, 2018