Fitment lbg-fitment-00042

Honda CR85 RB-3,4 Expert >>> 428 Chain Conversion

03-04 / 428 chain

Fitment guidance

Make: Honda
CC: 85
Model: CR85 RB-3,4 Expert >>> 428 Chain Conversion
Year: 03-04
Front teeth: 15
Rear teeth: 56
Chain pitch: 428
Chain length: 124
Model type: Core

Langbiang Gravity Candidate Products

RS is a premium endurance racing steel sprocket. RA is a lightweight 7075-T6 racing aluminium sprocket. RH is reserved for the future hybrid platform.

RS Racing Steel

Premium endurance racing steel sprocket for hard off-road use, training fleets, mud, torque, and long service life.

RA Racing Aluminium

Lightweight 7075-T6 racing sprocket for reduced rotating mass, sharp response, and race-day performance.

Request	LBG SKU	Public name	Position	Series	Series name	Teeth	Material class	Mark	Status
Request	LBG-F-RS-15981-15-MK1	Langbiang Gravity RS Racing Steel Front Sprocket 15T	front	RS	Racing Steel	15	racing_steel	MK1	auto_candidate
Request	LBG-R-RS-26171-56-MK1	Langbiang Gravity RS Racing Steel Rear Sprocket 56T	rear	RS	Racing Steel	56	racing_steel	MK1	auto_candidate
Request	LBG-R-RA-26171-56-MK1	Langbiang Gravity RA Racing Aluminium 7075-T6 Rear Sprocket 56T	rear	RA	Racing Aluminium 7075-T6	56	racing_aluminium_7075	MK1	auto_candidate

Langbiang public SKUs are generated from private fitment geometry. Final compatibility must be verified before production or purchase.