Choosing the correct tractor tyre size in Kenya is critical for traction, fuel efficiency, soil protection, load handling, and overall farm safety. Using the wrong tyre size can reduce performance, increase fuel consumption, and cause premature tyre wear.

This practical guide explains how to read tractor tyre markings, how to match tyres to your tractor and farm conditions, and where to buy genuine tractor tyres in Kenya with confidence.

Why Tractor Tyre Size Matters

The correct tractor tyre size directly affects:

• Traction and pulling power on soft or uneven fields

• Soil compaction (wider tyres reduce ground pressure)

• Stability when hauling implements or trailers

• Fuel efficiency and tyre lifespan

For these reasons, always confirm the correct tyre size before buying tractor tyres in Kenya.

How to Read Tractor Tyre Markings

Tractor tyre sizes are shown on the sidewall in two common formats.

Bias / Traditional Format (Example: 18.4-30)

• 18.4 – Section width in inches (approximate)

• 30 – Rim diameter in inches

This format is common on many bias tractor tyres used across Kenya.

Metric / Radial Format (Example: 520/85R34)

• 520 – Section width in millimetres

• 85 – Aspect ratio (sidewall height as a percentage of width)

• R – Radial construction

• 34 – Rim diameter in inches

For example, 520/85R34 is a wide radial tyre commonly used on high-horsepower tractors, while 18.4-30 is a popular bias size for many farm tractors.

Step-by-Step: How to Confirm the Correct Tractor Tyre Size

1️⃣ Check the existing tyre sidewall
This is the most accurate source of your current tyre size.

2️⃣ Consult the tractor owner’s manual
It lists recommended tyre sizes, ply ratings, and inflation pressures.

3️⃣ Consider your working conditions
Soft soils, rocky terrain, or heavy hauling may influence tyre size and type.

4️⃣ Decide between bias and radial tyres
Bias tyres are rugged and affordable; radials offer better flotation and comfort.

5️⃣ Confirm rim size and load rating
Never fit a tyre to an incompatible rim.

6️⃣ Ask an expert before buying
You can send a photo of your tyre sidewall and tractor model to Automarket for confirmation.

Tyre Ply Rating & Load Capacity Explained

• Ply rating (PR) indicates tyre strength

• Higher ply rating = higher load capacity

• Heavy implements and frequent hauling require higher PR tyres

Manufacturers also specify load index and speed rating, which should always match your tractor’s workload.

Common Tractor Tyre Sizes Used in Kenya

Some of the most common tractor tyre sizes in Kenya include:

• 7.50-16– small tractors / front tyres

• 12.4-24, 13.6-28 – medium tractors

• 16.9-34, 18.4-30 – large tractors / rear tyres

• 520/85R34 – radial tyres for high-power tractors

Always verify the exact sidewall marking before replacement — similar sizes are not always interchangeable.

Tractor Tyre Fitment Tips for Kenyan Farms

• Soft or wet soils → wider tyres or radial tyres to reduce compaction

• Rocky or mixed terrain → bias tyres or reinforced constructions

• Replace rear tyres as matched pairs for balance

• Maintain correct inflation pressure to reduce wear and fuel use

Tractor Tyre Brands Available on Automarket

Automarket stocks a wide selection of genuine tractor tyre brands in Kenya, available in different sizes and ply ratings to suit local farming conditions. Brands commonly listed on Automarket include Apollo, OZKA, Speedways, BKT, JK, , Marcher, Galaxy and others shown on tractor tyre category pages.

Each product listing displays full tyre specifications, helping farmers confirm compatibility before purchase.

How Automarket Helps You Choose the Right Tractor Tyre

• Clear product specifications showing size, ply rating, and application

• Expert support to verify compatibility using tyre photos and tractor details

• Nationwide delivery via trusted courier services to major towns in Kenya

Frequently Asked Questions

Q: Can I replace 18.4-30 with 520/85R34?
A: Not directly. 520/85R34 is wider and may affect clearance and gearing. Always confirm rim compatibility and tractor specifications first.

Q: Which is better for Kenyan farms — bias or radial tyres?
A: Bias tyres are durable and affordable; radial tyres reduce soil compaction and improve fuel efficiency for high-hour operations.

Q: How do I choose the correct ply rating?
A: Match the ply rating to your tractor load, implements, and operating conditions, or consult Automarket’s tyre specialists.

Final Checklist Before Buying Tractor Tyres Online in Kenya

✔ Read the tyre size from your current sidewall
✔ Confirm rim diameter and load rating
✔ Choose bias or radial based on soil and budget
✔ Select the correct ply rating
✔ Buy from a trusted seller offering genuine tyres

Need Help Now?

Send a photo of your tyre sidewall and your tractor model to Automarket via phone or WhatsApp 0702906176 or email info@automarket.co.ke, and our team will confirm the correct tractor tyre size for you.