KX85 Big Wheel 428 conversion 555.13 462.51 428D130 (SKK055) S3-Cat-Helmets-AutoRacing Artrax disc rotors are all

Artrax disc rotors are all precision laser cut from premium Japanese induction hardened stainless steel

Rear sprocket features a 44-tooth count designed for comfortable cruising speeds and road use

Breathable design for airflow and ventilation

Unique texture provides additional grip

KX85 Big Wheel 428 conversion 555.13 462.51 428D130 (SKK055) S3-Cat-Helmets-AutoRacing Artrax disc rotors are allThis specialised 428 conversion kit is designed to improve the drivetrain durability of the KX85 Big Wheel. By moving to a larger chain size, junior racers gain increased strength and a longer component lifespan under competitive racing conditions. Upgrades the standard drive system to a more robust 428 pitch chain for better resistance to stretching and breakage. Includes a 51 tooth rear sprocket and 13 tooth front sprocket specifically configured