The ShockStop Endurance Suspension Seatpost (our original seatpost) provides 35mm of tunable, ultra-responsive suspension travel for the ultimate bump-eating comfort. Ride farther, faster, and more comfortably on the bike you already own, while the ShockStop Endurance Suspension Seatpost lets you float over rough terrain. 

Benefits:

• Ride farther & more often - the ShockStop Endurance Seatpost reduces fatigue from bumps and vibrations with superior shock absorption. 
  
• Ride faster & reduce fatigue - energy that is normally wasted suspending your body is converted into forward motion. 
  
• Better performance & complete control - customize your suspension seatpost feel to float over obstacles and maintain traction and control. 
• For the ultimate suspension system, pair with the ShockStop PRO Stem or ShockStop Stem  

Features:

• 35mm of active suspension travel
• Optimized linkage geometry provides ultra-responsive suspension feel
  
• Infinitely adjustable stiffness via pre-load adjustment and swappable springs
  
• Adjusting stiffness / pre-load does not reduce travel
  
• Swappable springs included to accommodate heavier riders and/or ride preference
  
• Di2 battery compatible with 27.2mm diameter x 350mm long size (see specs for details)
  
• Check technical specifications for sizes & compatibility

What's in the Box:

• 1 x ShockStop Endurance Suspension Seatpost
  
• 2 x springs (1 pre-installed, 1 included in box for increased stiffness)
  
• All required hardware

Specifications:

Diameter: 27.2mm, 30.4mm, 30.9mm, 31.6mm
Length: 280 mm (11 in), 350 mm (14 in), 400mm (15.7in), 450mm (17.7in)
Suspension Travel: 35 mm (1.4 in)
Rearward Offset: 7 mm (0.27 in)
Rearward Offset (@ 25% travel): 12 mm (0.47 in)
Spring Pre-load: User Adjustable
Weight: 280 mm – 497 g - w/main spring, 350mm – 547 - 634g - w/main spring, 400mm – 636 - 683g - w/main spring, 450mm – 704 - 732g - w/main spring
Rider Weight Limit: 110kg (242lb) for 27.2mm and 30.4mm diameters, 120kg (264lb) for 30.9mm and 31.6mm diameters
Material: 6061 T6 Aluminum Alloy
Saddle Rail Compatibility: 7mm round & 7x9mm oval
Di2 Battery Compatibility: Only compatible with the 27.2mm diameter x 350mm length (requires mount kit sold separately)
Intended Use: ASTM F2043 Class 2 - For on and off-road riding and drops less than 15cm (6")