Built for the best riders, ridden on the hardest tracks, ZEB Ultimate rules the world’s toughest enduros. Charger 3.1 with increased damping range and High Speed Compression, Low Speed Compression, and Low Speed Rebound adjustments ButterCups block 20% of high-frequency “trail chatter”. Limiting these vibrations massively reduces hand and arm fatigue leaving you feeling fresh with more control. DebonAir+ air spring is built to strike the perfect balance of what riders really want: a butterlike small bump feel, increased air volume to add support throughout the travel, and higher overall ride height for more confidence when things get steep. Ultra-low friction SKF wiper seals provide long lasting fork performance and improve overall suspension feel. Short fender compatibility. (RockShox fender included) SRAM Model ID: FS-ZEB ULTIMATE-A3 TECH SPECS Spring Type DebonAir+ W/ButterCups Steerer Tube Material Aluminum Travel 160mm Wheel Diameter 29 Crown Material Aluminum Rake 44mm Stanchions Material Aluminum Lower Tubes Material Magnesium Brake Type Disc Damping Adjustments External begin stroke rebound low speed compression high speed compression e-Bike approved Yes Maximum Tire Width 81mm Axle/Hub spacing 15x110mm TA Primary Color Red Spring Adjustments Air pressure Bottomless tokens Stanchions Diameter 38mm Steerer Tube 1-1/8-1.5 Damping Charger 3.1 RC2 W/ButterCups Maximum Rotor Size 220mm