John Deere 6145M Tire Size + Front & Rear Tractor Tire Guide

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Quick answer:

The John Deere 6145M tractor tire size is front 380/85R28 and the rear is 460/85R38.

Front tire380/85R28
Rear tire460/85R38
Front/rear setupDifferent front and rear tire sizes
Tire pressure24 PSI, 44 PSI, 12 PSI, 14 PSI
Rim diameter28 in front, 38 in rear

John Deere 6145M Tire Size Details

Front tire size 380/85R28
Rear tire size 460/85R38
Front/rear setup Different front and rear tire sizes
Original factory tire size Front 540/65R28, Rear 650/65R38
Replacement tire size Front 460/85R38, Rear 10.00-16
Front tire construction Metric radial
Rear tire construction Metric radial
Front section width 380 mm
Rear section width 460 mm
Front aspect ratio 85%
Rear aspect ratio 85%
Front rim diameter 28 in
Rear rim diameter 38 in
Approx front overall diameter about 53.4 in
Approx rear overall diameter about 68.8 in
Tire pressure 24 PSI, 44 PSI, 12 PSI, 14 PSI
Tire size alternatives / conversions 420/90R30, 480/80R42, 380/85R24, 420/85R24, 18.4-30, 14.9-24

Tire Size Comparison Chart

Front rim diameter comparison

This model

28 in

Average

17.1 in

Low

4 in

High

50 in

Rear rim diameter comparison

This model

38 in

Average

25.5 in

Low

0 in

High

50 in

John Deere 6145M Extra Tire Notes

Tire size note The John Deere 6145M uses different front and rear tire sizes in this data: front 380/85R28 (28 in rim, 380 mm width) and rear 460/85R38 (38 in rim, 460 mm width)
Pressure note For the John Deere 6145M with front 380/85R28 and rear 460/85R38 tires, the pressure values captured in the answer are 24 PSI, 44 PSI, 12 PSI, 14 PSI. Tire pressure is load-dependent, so use this as a reference value rather than a universal setting
Front/rear matching note The John Deere 6145M data shows front 380/85R28 and rear 460/85R38. When changing either size, front/rear rolling circumference and lead/lag need to stay within the correct range
Official information note

Mistakes do happen. Tire sizes can change by year, axle, wheel/rim option, tyre brand, tread type and local market. Please check the tire sidewall, operator manual and official deere.com website for official information.

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