Hot Racing Losi Promoto-MX Linear Rate Rear Spring Set (3) (Soft/Medium/Firm)

The Hot Racing Losi Promoto-MX Linear Rate Rear Spring Set includes three rear springs for suspension tuning: soft green, medium blue, and firm red. Designed for the Losi Promoto-MX 1/4 Dirt Bike, the linear-rate design maintains the same force rate throughout compression for predictable handling and setup adjustments.

These steel springs provide soft, medium, and firm options to help fine-tune the Promoto-MX suspension to suit your driving style.

Spring Details

• Soft green: 9.5T
• Medium blue: 9T
• Firm red: 8T

Specifications

• Length: 0.98in (25mm)
• Inner Diameter: 0.78in (19.8mm)
• Wire Diameter: 0.09in (2.3mm)
• Application: Promoto-MX

Suspension Tuning Effects

• Softer spring: Increased chassis roll, increased traction, better in bumpy conditions, and more likely to bottom out
• Stiffer spring: Decreased chassis roll, decreased traction, and increased responsiveness