World's Largest Aftermarket Motorcycle Parts and Accessories Superstore!


Gold Club Members Get 15% Off Your Entire Order!

Dunlop K81 4.25-18 Front/Rear Tire

Product may vary from photo(s).


Sale Price: $108.99 Regularly: $167.95

Gold Club Price: What's This? $108.99

J&P Part: ZZ25274

Rating: Read Reviews

Gold Club free ground shipping


This product has an attached note. View Product Note

Instructions  Dunlop-Load-Limit-Calculator.pdf  Dunlop-Tire-Tips.pdf

Dunlop K81 4.25-18 Front/Rear Tire

• This modern reproduction of a vintage tire is suited for restoration of older British bikes to their original specs

• The tube-type, 4-ply construction is available in blackwall only

Product Specs

  • Aspect Ratio: 85
  • Inch System: 4.25-18
  • Inner Diameter: 18″
  • Load Rating: 64
  • Manufacturer Part Number: 4292-80
  • OEM Reference: K81
  • Overall Diameter: 26.00″
  • Position: Front, Rear
  • Rim Diameter: 18
  • Rim Width: 2.15″ x 18″
  • Sidewall: Blackwall
  • Sold in Units: Each
  • Speed Rating: H - Rated up to 130 MPH
  • Tire Construction: Bias Ply
  • Tire Size: 120/90-18
  • Tire Width: 4.25
  • Tread Depth: 7.1mm (9/32″)
  • Width: 108mm (4.25″)


Note: This item is a universal/custom fit component, and does not have any direct standard/OEM model application. Some items may require modification and an advanced level of mechanical skill and/or knowledge for installation.

Customer Reviews


Excellent replacement for the old, hard tires on my 1976 Triumph Bonneville. Exact tread match. Perfect.


You probably won't find this tire cheaper anywhere else.

Important Product Notes

It is the customer’s responsibility to refer to their owners manual for proper size, load and speed ratings for their specific motorcycle before choosing a tire. J&P Cycles® is not liable or responsible whatsoever for any claims for damages or injury subsequent to the fitting of tires.