RockShox | 2027 SID Ultimate 3P | 120mm Crown Adjust

Climb harder. Descend without hesitation.

The 2027 RockShox SID Ultimate 3P Crown Adjust is a 120mm cross-country suspension fork designed for riders who want race-level efficiency with the stiffness and control required for more aggressive XC terrain.

Its lightweight 35mm chassis holds a precise line through technical sections, while the higher-volume DebonAir+ spring improves small-bump sensitivity and provides tunable mid-stroke support. The Charger Race Day 2 damper offers Open, Pedal, and Lock compression positions, all controlled directly from the fork crown.

Important Compatibility Note

This is the Crown Adjust version of the 2027 SID Ultimate 3P. The Open, Pedal, and Lock settings are selected directly from the fork crown. It does not use or require a handlebar remote.

Designed exclusively for 29-inch wheels, 15 x 110mm Boost front hubs, compatible tapered head tubes and headsets, and disc brakes. This fork is not approved for use on electric bikes.

Key Features

• Crown-Operated 3P Control
Open, Pedal, and Lock settings are selected directly from the fork crown without requiring a handlebar remote.

• Charger Race Day 2 Damper
RockShox’s lightweight race damper provides a plush Open position, an efficient Pedal setting, and a firm Lock position.

• Lightweight 35mm Chassis
Tapered-wall aluminum upper tubes balance low weight with the stiffness required for modern XC racing and technical terrain.

• Higher-Volume DebonAir+ Spring
Improves small-bump sensitivity while providing greater mid-stroke support and a more tunable ride.

• Refined Bushing Package
Increased bushing overlap reduces friction and creates a smoother, more stable feel throughout the fork’s travel.

• Race-Ready Construction
A machined forged-aluminum crown, magnesium lower legs, and Maxima Plush Dynamic Suspension Lube reduce weight and maintain consistent performance.

Technical Specifications

• Category
Cross-Country Suspension Fork

• Discipline
Mountain Bike

• Model Year
2027

• Wheel Size
29 inches

• Travel
120mm

• Damper
Charger Race Day 2

• Damper Control
Crown Adjust

• Compression Positions
Open, Pedal, and Lock

• Rebound Adjustment
External

• Air Spring
DebonAir+

• Volume Reducers
0 installed, maximum of 3 Bottomless Tokens

• Chassis Diameter
35mm

• Upper Tubes
Tapered-wall aluminum

• Upper-Tube Finish
Fast Black

• Crown Material
Forged hollow aluminum

• Lower-Leg Material
Magnesium

• Steerer
1.5-inch tapered

• Axle Standard
15 x 110mm Boost, Torque Cap compatible

• Included Axle
Maxle Stealth

• Fork Offset
44mm

• Axle-to-Crown Length
531mm

• Brake Compatibility
Disc brake

• Minimum Rotor Size
180mm

• Maximum Rotor Size
220mm

• Maximum Tire Diameter
758mm

• Maximum Tire Width
66mm

• Maximum Air Pressure
150 PSI

• Maximum Recommended System Weight
150kg

• E-Bike Approval
Not approved

• Fender Compatibility
RockShox bolt-on short fender

• Weight
1,480g with 120mm travel, Crown Adjust, and Maxle Stealth

• Finish
Electric Red Gloss

• Included Components
SID Ultimate 3P fork, Maxle Stealth axle, bolt-on short fender, star nut, and bolt-in Torque Cap adapters for standard hub end caps

Model Codes

• Manufacturer Part Number
00.4020.957.004

• Model ID
FS-SID-ULT3-D1

Choose this Crown Adjust version if you want direct access to Open, Pedal, and Lock settings without installing or purchasing a handlebar remote.