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 Damping Adjustments External begin stroke rebound low speed compression high speed compression Damping Charger 3.1 RC2 W/ButterCups Axle/Hub spacing 15x110mm TA Crown Material Aluminum Brake Type Disc e-Bike approved Yes Maximum Tire Width 81mm Steerer Tube Material Aluminum Stanchions Material Aluminum Primary Color Red Maximum Rotor Size 220mm Steerer Tube 1-1/8-1.5 Rake 44mm Spring Adjustments Air pressure Bottomless tokens Stanchions Diameter 38mm Wheel Diameter 27.5 Travel 190mm Lower Tubes Material Magnesium Spring Type DebonAir+ W/ButterCups