RockShox BoXXer Ultimate Charger 3 RC2 DebonAir+ Boost 29" Suspension Fork

The RockShox BoXXer Ultimate 29" suspension fork with Charger 3 RC2 damping and DebonAir+ air spring for Boost downhill bikes

In the Ultimate version, the BoXXer Boost suspension fork from RockShox - here in the 29-inch version - comes with Charger 3 RC2 damping, which can be modulated, and of course the DebonAir+ air spring. Thanks to the double crown design, 200 mm travel and the new 38 mm chassis, it is ready to step on the gas on downhill tracks. The shock allows you to adjust the rebound as well as high- and low-speed compression. The proven DebonAir+ air spring makes you think you have a steel spring under the cockpit and absorbs bumps with ease. You'll also benefit from the ButterCups, which soften those continuous, high-frequency trail vibrations that can otherwise give your arms and hands a hard time. The stanchion tubes, which are thicker than in the previous model, provide you with a balance of high stiffness, precise control and ride quality. With the BoXXer, you simply rush over smaller roots and rocks, land safely after jumps and ride at speed.

Guidelines for Replacing E-bike Components:

Before you replace components on your e-bike, please read through the guidelines for component replacement for CE-marked e-bikes/pedelecs with pedal assistance.

Specifications:

Application:

Downhill

Wheel Size:

29"

Suspension Type:

air

Travel:

200 mm

Steerer Tube:

1 1/8"

Axle Type:

thru-axle

Wheel Standard:

20 x 110 mm (Boost)

Brake Mount:

disc PM8 (direct mount 200 mm)

Technical Information:

Offset:

48 mm, 52 mm

Steerer Tube Length:

268 mm

Steerer Tube Diameter (Stem):

28.6 mm

Steerer Tube Diameter (Crown Race):

30 mm

Axle to Crown:

605 mm

Over Locknut Dimension:

110 mm

Stanchion Tube Diameter mm:

38 mm

Steerer Tube Material:

aluminium

Crown Material:

aluminium (6061-T6)

Stanchion Tube Material:

aluminium

Lower Tube Material:

magnesium

Adjustment Options:

Compression:

low-speed (15 clicks), high-speed (5 clicks)

Rebound:

yes (18 clicks)

Suspension Stiffness:

air pressure adjust

Remote:

no

Travel Adjustment:

no

Approved For:

Tyre Size (max.):

81 mm (tyre width)

Note:

For individual tyres, the tyre clearance must be checked with the fork fully compressed. It should be at least 6 mm measured from the fork crown.

Rotor Size (max.):

220 mm

Features:

• 29" double-crown suspension fork for downhill use with Boost dimensions
• with a stanchion tube diameter of 38 mm, thicker than predecessor for high stiffness
• DebonAir+ air spring with steel spring-like behaviour absorbs smaller bumps even better than DebonAir thanks to more volume and at the same time keeps the fork higher in travel
• ButterCups for smooth riding absorb 20% of lighter, high-frequency vibrations and thus prevent fatigue
• Charger 3 RC2 damping with fully independent adjustment of low and high speed compression through IFP design enables precise tuning
• Twin Tube air chamber in the stanchion tube for optimised positive air chamber and more linear spring characteristics
• higher volume than predecessor in the negative air chamber for smoother riding
• low-friction SKF wiper seals for high durability and good suspension behaviour
• with long-lasting Maxima Plush Dynamic Suspension Lube for low friction and good durability
• crown adjust
• also suitable for e-bikes
• lightweight, forged and anodised fork crown with 42 mm outer diameter and titanium bolts
• short and high fork crown for different head tube lengths
• with bolt mounts for short fenders
• optimised bottom-out bumper for soft landings after big drops
• 0 of maximum 6 volume spacers mounted
• developed with the help of top pro riders like Vali Höll and Loris Vergier

Models:

200 mm / 1 1/8 / 20 x 110 mm / 48 mm:

Travel:

200 mm

Steerer Tube:

1 1/8"

Offset:

48 mm

Model ID:

FS-BXR-ULT-D1

Manufacturer Number:

00.4020.955.001 (boxxer electric red-gloss), 00.4020.955.005 (gloss black)

200 mm / 1 1/8 / 20 x 110 mm / 52 mm:

Travel:

200 mm

Steerer Tube:

1 1/8"

Offset:

52 mm

Model ID:

FS-BXR-ULT-D1

Manufacturer Number:

00.4020.955.000 (boxxer electric red-gloss), 00.4020.955.004 (gloss black)

Contents:

• 1 x RockShox BoXXer Ultimate Charger 3 RC2 DebonAir+ Boost 29" suspension fork
• 1 x RockShox Maxle Stealth thru-axle
• 1 x RockShox fork crown
• 1 x RockShox fender
• 2 x RockShox bottomless tokens
• 1 x star nut
• 4 x bolts