Rock Shox ZEB Ultimate A3 27. 5" Suspension Fork Built for the world's toughest enduros. The Rock Shox ZEB Ultimate is the top-tier enduro fork in the ZEB lineup, and the A3 brings it forward with a new Charger 3. 1 RC2 damper that raises the bar on adjustability, traction, and control. Broader compression damping range means more usable tuning between a plush open position and a firm, supportive closed position. Butter Cups filter 20% of high-frequency trail chatter before it reaches your hands, and the Debon Air+ air spring delivers a butter-like small bump feel with increased support through the travel and a higher overall ride height for confident handling on steep terrain. SKF wiper seals, Maxima Plush Dynamic Suspension Lube, and an updated bushing package round out a fork that rides fast from the first pedal stroke and stays that way. Features Charger 3. 1 RC2 damper with Butter Cups features High Speed Compression, Low Speed Compression, and Low Speed Rebound adjustments with a broader overall range - less compression in the open position for traction, more support in the closed position for control Butter Cups vibration isolation blocks 20% of high-frequency trail chatter before it reaches the handlebar, reducing hand and arm fatigue over long descents Debon Air+ air spring with Butter Cups delivers a supple small bump feel, increased support through the travel, and a higher ride height for confident handling on steep and technical terrain Updated bushing package further reduces friction with an improved factory-level process for a better feel right out of the box SKF ultra-low friction wiper seals keep dirt out and suspension feel consistent over the long term Maxima Plush Dynamic Suspension Lube reduces friction, lasts longer, and maintains consistent damper performance ride after ride Bolt-in torque cap adapters included for use with standard hub end caps, with Torque Cap compatibility for a stiffer, more responsive front end Lightweight machined and anodized crown available in Electric Red, Slab Grey, and High Gloss Black E-bike approved SPECIFICATIONSWheel Size27. 5"Travel Options150mm, 160mm, 170mm, 180mm, 190mm Damper Charger 3. 1 RC2 with Butter Cups Damper Adjust Crown-mounted HSC, LSC, LSRAir Spring Debon Air+ with Butter Cups Stanchion Diameter38mm aluminum Steerer1. 5" tapered Axle15x110mm Boost, Torque Cap compatible Fork Offset38mm, 44mm Maximum Rotor Size220mm Minimum Rotor Size200mm Maximum Tire Width81mm Volume Reducers0/4, 1/4, 1/5, 2/5 tokens Fender Compatibility Bolt-on short (AC-FEN-ZEB-A1)E-Bike Approved Yes Colors Electric Red, Slab Grey, High Gloss Black Intended Use Enduro, All-Mountain | Sram | Rockshox Zeb Ultimate A3 27. 5" Suspension Fork 27. 5" 180Mm 15X110Mm 44 Offset Grey