What tire size does the John Deere 1025R use?
The John Deere 1025R uses 18×8.50-10 front tires and 26×12-12 rear tires. These are the main sizes used across common R3 turf, R3 turf radial, and R4 industrial tire setups. Some listings write the front R4 size as 18×8.5-10, which is the same basic size format as 18×8.50-10.
John Deere 1025R Tire Size: 18×8.50-10 Front / 26×12-12 Rear
The John Deere 1025R uses 18×8.50-10 front tires and 26×12-12 rear tires for common turf and industrial tire setups.
Best simple answer: buy 18×8.50-10 front tires and 26×12-12 rear tires for the John Deere 1025R. Then choose R3 turf for mowing and lawns, or R4 industrial for loader work, gravel, dirt, and mixed property jobs.
John Deere 1025R R3 Turf Tire Size
The R3 turf tire setup for the John Deere 1025R uses 18×8.50-10 front tires and 26×12-12 rear tires. This is the best setup for mowing, finish work, lawn protection, and owners who care more about grass-friendly traction than aggressive grip.
R3 Turf Tire
Size
Best Use
Front R3 Turf
18×8.50-10
Mowing, steering, lawn protection, finish work.
Rear R3 Turf
26×12-12
Grass-friendly rear traction and smooth lawn operation.
R3 Turf Radial Front
18×8.50-10
Listed front turf radial option using the same front size.
John Deere 1025R R4 Industrial Tire Size
The R4 industrial tire setup for the John Deere 1025R uses 18×8.5-10 front tires and 26×12-12 rear tires. R4 tires are a popular choice for loader work, gravel, dirt, snow work, and mixed property maintenance.
R4 Industrial Tire
Size
Best Use
Front R4 Industrial
18×8.5-10
Loader work, gravel, dirt, snow, and property jobs.
Rear R4 Industrial
26×12-12
Mixed-use traction with tougher tread than turf tires.
Owner tip: front tires may be written as 18×8.50-10 or 18×8.5-10. Treat those as the same basic size, but still match tread type, ply rating, rim fitment, and front/rear tire set.
How to Read John Deere 1025R Tire Sizes
The John Deere 1025R uses compact tractor tire sizing. In 26×12-12, the first number is tire height, the second is tire width, and the last number is rim diameter.
Tire Size
Meaning
Used On
18×8.50-10
About 18 inches tall, 8.5 inches wide, fits a 10 inch rim
1025R front tires
26×12-12
About 26 inches tall, 12 inches wide, fits a 12 inch rim
1025R rear tires
Best Replacement Tires for a John Deere 1025R
The best replacement tire depends on how you use the tractor. For mowing and lawn work, choose R3 turf. For loader work and gravel, choose R4 industrial. For snow, slopes, mud, or mixed terrain, some owners consider hybrid or more aggressive tread options, but they must stay compatible with the 1025R front/rear rolling size.
Replacement Target
Recommended Size
Best For
Front turf tire
18×8.50-10 R3
Mowing, lawn care, low turf damage.
Rear turf tire
26×12-12 R3
Finish mowing and lawn-friendly work.
Front industrial tire
18×8.5-10 R4
Loader work, gravel, dirt, snow, rougher use.
Rear industrial tire
26×12-12 R4
General property work and tougher mixed-use traction.
Hybrid / aggressive tire
Match 18×8.50-10 front and 26×12-12 rear class
More grip than turf while staying close to factory sizing.
Wheel and tire assembly
Match 1025R fitment and bolt pattern
Useful if swapping between turf and industrial tire sets.
Blunt verdict: do not randomly upsize tires on a 4WD 1025R. Front and rear rolling circumference matters. Wrong tire combinations can cause 4WD binding, drivetrain stress, poor steering, and mower deck clearance problems.
R3 Turf vs R4 Industrial vs Aggressive Tires
R3 Turf
Best for mowing, lawn protection, lower turf damage, and smoother ride. Weakest choice for mud and heavy loader abuse.
R4 Industrial
Best all-rounder for loader work, gravel, dirt, snow, and property maintenance. Can mark lawns more than turf tires.
Aggressive / Hybrid
Good for extra grip, slopes, mud, snow, and rough ground, but check clearance, rolling diameter, and mower-deck compatibility.
John Deere 1025R Tire Pressure
John Deere 1025R tire pressure is not one fixed number for every machine. It depends on tire type, loader use, ballast, mower deck setup, tread type, tire brand, ply/load rating, and sidewall limits. Use the operator manual, tire sidewall, and tire manufacturer’s load guidance for your exact tire.
Use Case
Pressure Guidance
Why It Matters
Mowing with R3 turf tires
Keep left and right pressures equal and within tire/manual guidance
Uneven pressure can make the mower deck cut unevenly.
Loader work
Front tires may need higher pressure within tire sidewall limits
The loader puts extra load on the front axle and front tires.
Snow work with chains
Use correct pressure and chain tension for safe clearance
Loose chains can slap, damage parts, or fall off.
Ballasted rear tires
Check inflation after adding ballast or wheel weights
Ballast changes load and sidewall deflection.
Real-world tip: if the 1025R suddenly cuts unevenly, check tire pressure before blaming the mower deck. On a sub-compact tractor, tire pressure changes deck height fast.
John Deere 1025R Tire Chains
Rear tire chains for the John Deere 1025R should match the rear tire size, usually 26×12-12. Chains are most useful for snow, ice, hills, and slippery surfaces. Always check clearance around fenders, mower deck parts, hydraulic lines, brake linkage, and the 3-point hitch area.
John Deere 1025R Tire Size and Mower Deck Clearance
The 1025R is often used with mid-mount mower decks, including 54D and 60D setups. Staying close to the factory tire sizes matters because tire height affects mower deck height, deck leveling, Load-N-Go use, and overall clearance.
Issue
Why Tire Size Matters
Deck Level
Different tire heights can change the front-to-rear and side-to-side deck angle.
Cut Quality
Wrong tire size or pressure can cause scalping, uneven cut, or poor finish.
Deck Clearance
Aggressive or oversized tires may create clearance issues.
4WD Driveline
Incorrect rolling circumference can stress the 4WD system.
Common John Deere 1025R Tire Problems
Problem
Likely Cause
Fix
Uneven mowing cut
Unequal tire pressure, wrong tire size, or deck out of level
Set tire pressure first, then level the deck.
Poor loader traction
Turf tires, no rear ballast, wet ground, or low rear bite
Use proper ballast and consider R4 or more aggressive tread.
Front tire sidewall damage
Loader work, low pressure, rough ground, or weak ply rating
Use correct load rating and pressure for loader work.
Tire chains rubbing
Wrong chain size, loose chains, or clearance issue
Use chains sized for 26×12-12 and check clearance carefully.
4WD binding
Mismatched tire rolling size or wrong front/rear tire combo
Use matched factory-size front and rear tire sets.
Turf damage
R4/aggressive tread, wet lawn, sharp turns, or heavy ballast
Use R3 turf tires and avoid tight turns on soft grass.
Keep front and rear rolling sizes matched as a set
Mower Deck Clearance
Check if using aggressive or non-factory tread
Loader Use
Choose proper ply/load rating and use rear ballast
Tire Chains
Rear chains usually need to fit 26×12-12 tires
John Deere 1025R Tire Size Questions
What size are the front tires on a John Deere 1025R?
The John Deere 1025R front tire size is 18×8.50-10. Deere also lists R4 front tires as 18×8.5-10.
What size are the rear tires on a John Deere 1025R?
The John Deere 1025R rear tire size is 26×12-12.
What are the John Deere 1025R R3 turf tire sizes?
R3 turf tires are 18×8.50-10 front and 26×12-12 rear.
What are the John Deere 1025R R4 industrial tire sizes?
R4 industrial tires are 18×8.5-10 front and 26×12-12 rear.
Can I put bigger tires on a John Deere 1025R?
Not as a casual upgrade. Bigger tires can affect deck clearance, 4WD ratio, steering, mower height, and driveline load.
Are John Deere 1025R turf and R4 tires the same size?
They use the same basic listed size class: about 18×8.5-10 front and 26×12-12 rear. Tread, ply, and real rolling diameter can still vary by tire brand and model.
What rear tire chains fit a John Deere 1025R?
Rear chains should match the rear tire size, usually 26×12-12.
What tire pressure should a John Deere 1025R use?
Use the operator manual, tire sidewall, and tire maker guidance for your tire type and load. Loader work, ballast, turf mowing, and snow chains can all change the best pressure.
Which tires are best for mowing with a John Deere 1025R?
R3 turf tires are usually best for mowing and lawn protection.
Which tires are best for loader work on a John Deere 1025R?
R4 industrial tires are usually the better all-round choice for loader, gravel, dirt, and property work, especially with proper rear ballast.
John Deere 1025R Tire Size Summary
Front tire size: 18×8.50-10 / 18×8.5-10.
Rear tire size: 26×12-12 / 26×12.00-12.
R3 turf front: 18×8.50-10.
R3 turf rear: 26×12-12.
R3 turf radial front: 18×8.50-10.
R4 front: 18×8.5-10.
R4 rear: 26×12-12.
Front rim diameter: 10 inch.
Rear rim diameter: 12 inch.
Common front tread width: about 36.7 inches.
Common rear tread spacing: about 35.2 inches.
Best owner answer: use 18×8.50-10 front tires and 26×12-12 rear tires, then choose R3 turf or R4 industrial based on your work.
Last checked: John Deere 1025R R3 turf, R3 turf radial, R4 tire sizes, front/rear tire size, rim diameter, front tread width, rear tread spacing, and replacement tire guidance checked against John Deere and tractor specification references.
