Rockshox BoXXer B1-B2 (RC & WC) 2015-19

The B1/B2 Boxxer used the 35 mm chassis of the previous A1-A2 versions but was the first with the Charger damper. The base model RC still came with a basic Motion Control damper. This version did not fit 29" wheels and race teams with 29" wheels ran hybrid forks with Lyrik lower legs.
BoXXer

Fork Details & Identification:

Brand	Rockshox	Stanchions	35 mm aluminum, Black anodised
Model	RC with Moco & coil spring World Cup with Charger RC damper & air spring	Crown & Uppers	Aluminium
Release Year/s	2015-2018	Decals	Various
Damper	RC - Motion Control compression with one way rebound piston. Adjustable LSR & compression. WC - Charger damper with shim stacks. Adjustable LSR & LSC	Wheel Size	26" & 27"
Spring	RC - Coil spring. Red = medium, 40lb/in Yellow = soft, 35lb/in Blue = firm, 47lb/in WC - Air with negative set by internal valve at top-out	Configurations & Travel	26 & 27" 200 mm
Fitment Options		Stem	Conventional or Direct Mount Stem 4x M6 bolts on 30 x 50 mm square pattern
Updates Since 2015	Mostly cosmetic	Upgrade Compatibility	Charger damper can be fitted to Motion Control forks. Charger Damper can be tuned and modified for better performance. Air forks can be converted to coil, but not vice versa due to coils scratching the insides.

Upgrades:

Make your BoXXer even better with these upgrades. Purchase either with a Shockcraft service or for DIY installation. Pricing is provided at links below.

Charger Damper	Replace the low performance and untunable Motion Control damper with a Charger Damper which can be tuned for good performance at almost any rider weight and aggression level
Damper Tune (Unharsh Modification & Matrix Tune)	Tuning the BoXXer Charger Damper to your weight, terrain and aggression level. Learn More
Negative Air Upgrade	Higher volume negative air upgrades for World Cup forks with solo-air system. Gives better small bump compliance and better mid-stroke support without the weight of coil.

Fluids:

Stock	RC- Rockshox/Maxima 5 wt fork oil in damper - 290cc volume WC - Rockshox/Maxima 3 wt fork oil in damper - bleed full. WC - Grease in air-spring. Rockshox/Maxima 0W30 Semibath Spring side bath - 20 cc Rockshox/Maxima 0W30 Semibath Damper side bath - 10 cc
Shockcraft Recommended	RC - Motorex 2.5 wt fork oil in MoCo damper. 290cc volume WC - Hot Oil Green in Charger Damper for quiet operation. WC - Hot Oil Pink in Charger Damper for highest performance. Motorex Supergliss 10 cc damper side bath oil & 20cc spring side. Slickoleum - air piston & seals