- Black springs - Black body - S: Single tube body - Piston diameter: 36mm - P: Monotube high pressure gas type shock absorber with external "piggy back" reservoir - R1: Adjustable rebound damping. Adjuster wheel above the end eye - C1: Adjustable compression damping. Adjuster wheel or slot on the reservoir - L: Adjustable length - Length: 296 +10/-0 mm - Stroke: 59 mm - Rate N/mm: 19 N/mm - Position: rear - Mounted spring: 00281-72 - Packaging unit: pair - ABE approved. The STX36 is a shock that's been around the block and it paid it's dues when it comes to performance and durability. Especially for the cruiser market when taking riding a step up, the STX36 is an excellent investment when suspension characteristics are important to you.