This listing is for the RR2 spring part number BILE4-MCS-0038A00 I do have both the RR2 and RR3 in the description so you look at the difference between them both
• Kevin Rumley purpose built variable body springs specifically for dirt Late Models
• Designed to provide optimized performance and consistency that has been tested and proven by some of the most successful teams in the industry
• Manufactured with best possible materials for strength, durability, and lightness
Bilstein RR-2 Spring
• 10” tall, 250 lb/in rate spring designed to replicate a 10” 250 lb/in spring with two spring rubbers installed
• Maintains a 250 lb/in rate until it reaches 420 lbs of load (spring height: 8.32”), ensuring no progression before the install (static) height
• Optimized for RR travel in a Dirt Late Model, focusing on 1.5” to 2” of travel load to enhance side bite at corner center
The spring’s progressive characteristics:
At 6.82” height (1.5” of travel), the load reaches 940 lbs (34% progressive increase)
At 6.32” height (2” of travel), the load increases to 1120 lbs (29% further progression)
Bilstein RR-3 Spring
• Designed with the same concept as the RR-2 but replicating a 10” 250 lb/in spring with three spring rubbers installed instead of two
The spring’s progressive characteristics:
At 6.82” height (1.5” of travel), the load reaches 1120 lbs (45% progressive increase)
At 6.32” height (2” of travel), the load increases to 1380 lbs (42% further progression)
