Why We Like The SID Ultimate 29inch Boost Fork
Coming from RockShox's SID family, the SID Ultimate 29inch Boost Fork is the top-level option for aggressive XC riding. It perfectly balances our go-fast tendencies with our desire to chase after trails with bigger hits and features. Stiffness is boosted over the featherweight SID SL thanks to a larger 35mm chassis, supported internally by RockShox's Charger Race Day Damper. Ultra-low friction SKF wiper seals offer lasting performance and an overall suspension feel, and its DebonAir spring employs a higher ride height for improved handling and confidence.
Details
- RockShox's stiff, speedy fork for XC riding and racing
- 35mm chassis is lightweight, but more rigid than SD SL
- Charger Race Day Damper boosts traction and bump-absorption
- DebonAir air spring maintains rider height for confidence and control
- Ultra-low friction SKF wiper seals improve lifespan and suspension feel
- Item #RSXB04Y
- Travel
- 120mm
- Stanchion Material
- Fast Black-coated tapered aluminum
- Lower Material
- magnesium
- Crown Material
- forged, hollow 7050 aluminum
- Wheel Size
- 29in
- Steer Tube Diameter
- 1-1/8 - 1-1/2in tapered
- Stanchion Diameter
- 35mm
- Axle To Crown
- 531mm
- Rake
- 44mm
- Spring Type
- DebonAir
- Damper
- Charger Race Day
- Adjustability
- external rebound, 2-position compression (Open/Lock)
- Lockout
- yes
- Axle
- 15 x 110mm Boost
- Brake Compatibility
- post-mount disc
- Rotor Compatibility
- 180 - 220mm
- Includes
- 2 volume spacers
- Claimed Weight
- [120mm, 44mm offset] 3lb 6oz
- Manufacturer Warranty
- 2 years
- Activity
- cross-country, trail
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