- Black springs - Black body - Piston diameter: 36mm - S: Single tube body - D: Mono type high pressure gas type shock with internal reservoir in the main body - R1: Adjustable rebound damping - L: Adjustable length - Piston diameter 36mm - Length: 305 +10/-0 mm - Stroke: 66 mm - Rate N/mm: 25 N/mm - Position: rear - Mounted spring: 00280-21 - Packaging unit: pair - ABE approved. These STX36's are designed to replace the dual shock absorbers on Touring models for comfort and improved rideability of your bagger.