The Yanmar YM135 tractor is listed with a 20×8.00-10 front tire and a 27×8.50-15 rear tire.
Yanmar YM135 Tire Size Chart
Configuration
Tire size
Lawn/turf front
20×8.00-10
Lawn/turf rear
27×8.50-15
Recommended tire pressure
There isn’t a single fixed Yanmar YM135 tire PSI number; so use the max pressure on the tire’s sidewall and make sure you’re not so low that the tire slips off the bead. For many Yanmar tractors; people commonly run around 6–8 psi for lighter/non-heavy loads and about 20–25 psi when carrying heavy loads (like on a loader).
Before buying replacement tires
Match the complete sidewall size, rim diameter, axle position, 2WD/4WD configuration and tire type before ordering. On driven front axles, changing overall tire diameter can upset the required front-to-rear rolling ratio.
Tire Pressure
Recommended tire pressure: There isn’t a single fixed Yanmar YM135 tire PSI number; so use the max pressure on the tire’s sidewall and make sure you’re not so low that the tire slips off the bead. For many Yanmar tractors; people commonly run around 6–8 psi for lighter/non-heavy loads and about 20–25 psi when carrying heavy loads (like on a loader).
Pressure warning: Confirm the correct pressure in the official operator’s manual and the tire manufacturer’s load-and-pressure chart before inflation.
Wheelbase and Ground Clearance
Wheelbase
45.7 inches 116 cm 48.9 inches 124 cm
Ground clearance
9.6 inches 24 cm
Specification disclaimer
These specifications are provided as a reference and may vary by production year, country, axle, wheel package and previous tire changes. Before purchasing, fitting or inflating tires, confirm the specifications using the Yanmar official U.S. website, the official operator’s manual and the markings on the tires currently fitted.
