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    • RockShox SID Ultimate Race Day Forks - Boost 2021

  • RockShox SID Ultimate Race Day Forks - Boost

    Ready for intense MTB rides, these forks feature a lightweight design with exceptional comfort and control to meet the speed needs of XC racing. They feature a reliable DebonAir air spring and a Charger Race Day damper, which gives you the freedom to adjust the compression to match your riding style and the terrain conditions. One final highlight is their 35mm tapered wall aluminium upper tubes and magnesium lower legs, which deliver superior durability without any unnecessary weight being added to your ride.

    35mm chassis is the perfect blend of light weight and stiffness for the modern XC bike.

    Charger Race Day Damper - our lightest production damper with rock-solid lockout.

    DebonAir™ air spring is tuned specific to meet the demands of XC and maintains a higher ride height for increased confidence and control.

    Ultra-low friction SKF wiper seals provide long lasting fork performance and improve overall suspension feel.

    Maxima Plush damping fluid reduces friction and silences damper noise.

    29" wheel only.

    120mm max travel.

    Machined/anodised crown.

    2-bolt mounts to fit a short fender (RockShox fender sold separately).

    Ultimate foil graphics package.


    • Upper Tube Type: 35mm tapered wall Aluminium
    • Lower Leg Material: Magnesium
    • Crown Material: Forged, hollow Aluminium
    • Brake Type: Disc
    • Maxle Included: Maxle Stealth
    • Damping Adjustments: Extl rebound, 2 position compression (open/lock)
    • Damper Adjustment: Crown
    • Axle: 15x110mm BOOST™
    • Spring: DebonAir
    • Fork Offset: 44mm (29")
    • Damper: Charger Race Day
    • Steerer: 1.5" Tapered
    • Crown OD (mm): 58mm

    Buy RockShox Components from Chain Reaction Cycles, the World's Largest Online Bike Store.


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    Forks Buying Guide

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