Tire size
12.4-32 Tractor Tires
12.4-32 is a bias farm tractor rear tire size with R-1 tread, used for row crop.
New and used options. Tell us the quantity, your machine and where to ship.
12.4-32 tires listed now
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New
22 sizes Ozka KNK50 R-1 Bias Tractor Tire
From $75.00
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New
18 sizes Petlas TA60 R-1 Bias Tractor Tire
From $235.00
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New
8 sizes Cultor AS-Agri 13 R-1 Bias Tractor Tire
From $560.00
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New
23 sizes Alliance 324 FarmPRO R-1 Bias Tractor Tire
From $248.00
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New
23 sizes BKT TR 135 R-1 Bias Tractor Tire
From $332.00
Not what you need? We source more 12.4-32 tires than we list. Add the size to your quote list above.
What “12.4-32” means
- 12.4Section width: 12.4 in (315 mm)
- -Bias-ply construction
- 32Rim diameter: fits a 32-inch wheel
Where 12.4-32 is used
| Type | Tread | Construction | Typical use |
|---|---|---|---|
| Farm Tractor Rear | R-1 | Bias | Row crop |
Buying 12.4-32 tractor tires
12.4-32 is a tall, narrow rear tire for row-crop tractors, including many older machines. The narrow footprint runs between tight rows and the 32-inch rim lifts the axle for crop clearance when cultivating and spraying. It is about 12.4 inches (315 mm) wide on a 32-inch wheel.
The radial equivalents are 12.4R32 and 320/85R32. Most buyers in this size stay with bias R-1.
Easy to confuse
- 12.4-28, 12.4-30 and 12.4-32 share the same width but fit different wheels. Read the rim size on the sidewall.
- 12.4-32 vs 14.9-32: same rim, but the 14.9 is wider and taller and needs a wider rim.
Row width
Narrow rears only help if they sit centered between your rows. Tell us your row spacing and we will check the fit.
What to check
- Tread: R-1 is the standard farm lug; ask about R-1W for wet ground and longer wear.
- Ply rating: match or exceed your current tires, especially if the tractor runs a loader or heavy three-point implements.
- Tube or tubeless: tell us what you run now, and whether the tires are filled with liquid ballast.
- Front-wheel-assist tractors: changing the rear size or construction changes the front-to-rear ratio. Check it before you order.
- Used tires: ask for the tread depth, the date code and photos of both sidewalls, and look for weather cracks.
- Pairs: replace both rears together so the tractor pulls straight.
Send the quantity, new or used, and the delivery location for a quote. More rear sizes are on our tractor tires page.
What do 12.4-32 tires cost on our site?
We list 5 models in 12.4-32. 5 have a listed price, from $248 (Alliance 324 FarmPRO) to $1,120 (Cultor AS-Agri 13) per tire, with a median of $298. Prices are per tire in US dollars and change with stock and season.
| Model | Tread | Load / ply | Price per tire |
|---|---|---|---|
| Alliance 324 FarmPRO | R-1 | 8 ply / 125A8 | $248 |
| Ozka KNK50 | R-1 | 8PR | $258 |
| Petlas TA60 | R-1 | 8PR 124A6 | $298 |
| BKT TR 135 | R-1 | D/8 ply | $962 |
| Cultor AS-Agri 13 | R-1 | 6 ply TT | $1,120 |
How tall is the 12.4-32 tire?
The nominal overall diameter is about 53.1 in (1,348 mm), which gives a rolling circumference near 167 in (4,236 mm). That figure is an estimate that assumes an 85% aspect ratio, the usual rule for old inch sizes. Real tires vary by make and load, so treat it as a guide and use the tire diameter calculator or the lead-lag calculator before you change size on a front-wheel-assist tractor.
Is 12.4-32 a radial or a bias tire?
It is a bias-ply size. The dash in the size marks bias construction, which costs less and has stiffer sidewalls. See the radial vs bias guide.
Brands we source
- Michelin
- Bridgestone
- Goodyear
- Trelleborg
- BKT
- Firestone
- Titan
- Alliance
- Mitas
- Continental
- CEAT
- Yokohama Off-Highway
- Nokian Tyres
- Cultor
- Galaxy
- Carlisle
- Petlas
- Ascenso
- Maxam
- Ozka
Brand availability varies by size. Ask us which brands we can supply in 12.4-32, new or used.