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RockShox
SID Ultimate 2-Position 29inch Boost Fork - 2022

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Why We Like The RockShox SID Ultimate 2-Position 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 crown (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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