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Rock Shox SID Ultimate Race Day Twistlock 2021

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Rock Shox SID Ultimate Race Day Twistlock

The world’s most winningest XC fork is charging back to the podium with new capabilities and two superfast new siblings. SID got swoll; we beefed it up to tackle more super-fun terrain. The new SID SL is light, slanky, and fast AF, crushing quick courses and fast tracks. Last but not least, the new SIDLuxe is a thoroughbred rear shock engineered to win races and compliment our SID forks. The SID family has something for every XC rider. Whatever the course, there’s a SID to get you there.



Riding SID Ultimate means every detail is considered. Packed in a stiff, lightweight 35mm chassis, and equipped with the lightest performance damper we've ever made - Charger™ Race Day. Perfectly balanced to satiate your need for XC speed.

  • New 35mm chassis is the perfect blend of light weight and stiffness for the modern XC bike
  • New Charger Race Day Damper - our lightest production damper with rock-solid lockout
  • New DebonAir air spring is tuned specifically to meet the demands of XC and maintains a higher ride height for increased confidence and control
  • New 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
  • Machined/anodized crown
  • New short fender compatibility. Includes RockShox branded 2-bolt short fender
  • Signature SID Blue colorway and Ultimate High Gloss Black
  • Ultimate foil graphics package
  • Remote options include TwistLoc remote


Wheel size 29"
Travel (mm) 110mm, 120mm
Spring DebonAir
Fork offset 44mm (29")
Maximum Rotor Size 220mm
Upper tube type 35mm tapered wall aluminum
Max Tire Width (mm) 66
Minimum Rotor Size 180mm
Damper Type Charger Race Day
Color (FS) Gloss Black, Gloss Black W/Copper Decal, Gloss Black W/Rainbow Decal, Gloss Blue
Fender Compatibility Short, 2 point mount
Weight (g) 1537
Weight Based On 120mm travel W/Maxle Stealth


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