RK Excel
RK Excel BL420MRU Drive Chain Black 420 X 120 (BL420MRU-120)
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RK Excel BL420MRU Drive Chain Black 420 X 120 (BL420MRU-120)
RK Excel

RK Excel BL420MRU Drive Chain Black 420 X 120 (BL420MRU-120)

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SKU: BL420MRU-120

MRU features RK’s proprietary Ultra Thin Seal, U-Rings, where the ...Read more

Price:
$120.04 $160.04
1200 ENTRIES10X
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

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Product Details

Product Description
Part Numbers
Sizing & Fit

MRU features RK’s proprietary Ultra Thin Seal, U-Rings, where the thickness of the seal is less than 50% of the most common O-ring seal. This allows RK to design a Sealed Chain with the weight of a Non-Sealed Chain. MRU will feature 4 times longer chain life than comparable non-sealed 420 chains and will require less chain adjustments compared to non-sealed 420 chains.

  • Tensile Strength: 4,540 lbs
  • Max CC Rating: 150cc Street, 150cc Off-road
  • Max Horsepower: 25 HP
  • Weight: 1.74 lbs
  • Max Chain Width: 17.1mm
  • Master Link Included: Clip type
  • Brand: RK Excel
  • Part number: BL420MRU-120
  • Category: Chains

MRU features RK’s proprietary Ultra Thin Seal, U-Rings, where the thickness of the seal is less than 50% of the most common O-ring seal. This allows RK to design a Sealed Chain with the weight of a Non-Sealed Chain. MRU will feature 4 times longer chain life than comparable non-sealed 420 chains and will require less chain adjustments compared to non-sealed 420 chains.

  • Tensile Strength: 4,540 lbs
  • Max CC Rating: 150cc Street, 150cc Off-road
  • Max Horsepower: 25 HP
  • Weight: 1.74 lbs
  • Max Chain Width: 17.1mm
  • Master Link Included: Clip type
  • Brand: RK Excel
  • Part number: BL420MRU-120
  • Category: Chains

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