MXU Chains

Ultra Thin Seal Chain for Enduro 

RK 520MXU is the lightest Sealed-Ring enduro/motocross chain available in market today, 13.8g/link, only 0.1g/link heavier than RK 520MXZ4.

MXU series is the next generation of enduro/motocross racing chains featuring RK’s only technology of Ultra Thin Seal, U-Rings or UW-Rings, make possible to design a Sealed Chain with
the weight of a Non-Sealed Chain. Seal Rings prevent debris to enter the chain
which ensures the efficient horsepower transmission from the engine to the
rear wheel throughout the chain life.



RK EUROPE / GB420MXU
420MXU U-RING CHAIN
  • Tensile Strength: 24.0kN
  • Application: 50cc / 150cc
  • Master Link Included: Clip type
  • Weight: 0.83Kg/100L
RK EUROPE / gb420mxu

You may be intrested by:

GB520KXZ seal520MXZ seal520MXU seal
GB520KXZ520MXZ520MXU
Tensile Strengthcoming soon Kn35,6 Kn35,6 Kn
Application Cyl.coming soon125cc / 500cc125cc / 500cc
Master Link Includedcoming soonClip typeClip/Rivet type
Weight/100Lcoming soon Kg1,37 Kg1,38 Kg
ApplicationMOTOCROSSMOTOCROSSMOTOCROSS / ENDURO
Seal TypeNON-SEAL sealNON-SEAL sealUW-RING seal
RK EUROPE / GB428MXU
428MXU U-RING CHAIN
  • Tensile Strength: 27.0kN
  • Application: 50cc / 150cc
  • Master Link Included: Clip type
  • Weight: 1.00Kg/100L
RK EUROPE / 520MXU
520MXU UW-RING CHAIN
  • Tensile Strength: 35.6kN
  • Application: 125cc / 500cc
  • Master Link Included: Clip/Rivet type
  • Weight: 1.38Kg/100L

Available in
420/428/520



RK EUROPE - MADE IN JAPAN CHAIN

Main point

  • For Enduro & Motocross
  • RK U & UW Seal Ring
  • Lightest off-road seal chain 
  • Use by Graham Jarvis
  • Use by Top MXGP teams