Here is the short answer. K tread is for stability. M tread is for traction. S tread is for wear. S Click is the S tread for click style wheels. O tread is smooth, for the longest wear on short runs. Pick the one that matches where your lift actually works, not where you wish it worked.

When someone calls us for a solid pneumatic forklift tire, the size is usually the easy part. It is molded on the sidewall: 6.00-9, 7.00-12, 21x8-9. The question that holds up the order is the next one. Which tread pattern?

On our Sentry Tire Dureaco solid pneumatic line, the pattern is the letter in the product name. K, M, S, S Click and O. Those letters are not filler. Each one is a different design for a different job. Get it wrong and you will feel it in how the lift handles, and you will see it in how fast the tire wears.

Below is each pattern, what our product pages say it is built for, and a simple way to choose.

What every Dureaco solid pneumatic tire shares

Start with what does not change. Every tire in the Dureaco solid pneumatic line has the same core build, according to the product pages:

  • Solid tire, pneumatic style. It is shaped like a pneumatic tire, so it fits a pneumatic forklift wheel. But it is solid rubber. Nothing to go flat.
  • Solid side wall design. The pages say the solid side wall maximizes durability for the toughest applications.
  • Heat-resistant compound. The compound is formulated to resist heat build-up. The pages tie that directly to longer tire life.
  • Built for material handling. Forklifts and other material handling equipment.
  • Interchangeable wheels. When the tire is worn out, the pages note it can be replaced on interchangeable wheels instead of replacing the whole wheel.

So the construction is the same whichever letter you pick. The tread is what changes how the tire behaves.

K tread: maximum footprint and stability

K tread is the pattern we sell the most of on forklifts. You will find it in sizes like the 6.00-9 Sentry Tire Dureaco K Tread, the 7.00-12 K Tread, the 6.50-10 K Tread and the 21x8-9 K Tread.

The product pages describe K tread as designed for a maximum footprint for excellent stability. More rubber on the ground means a more planted lift. That matters most when the load is up high. A lift that feels steady with forks raised is a lift your operators trust.

K tread is the right call when:

  • The lift works both inside the building and out in the yard.
  • Stability under load is your top concern.
  • You want one tread you can standardize on across several trucks.

K also comes in some less common sizes, like the 15x4.5-8 K Tread, the 200x50-10 K Tread and the 23x9-10 K Tread. That helps if you run a mixed fleet and want the same pattern on every machine. Fewer patterns means fewer mistakes when someone grabs a spare.

M tread: interlaced traction

Look at M tread when traction is the problem. The product pages describe it as an interlaced traction design for grip on various surfaces, from smooth warehouse floors to rough outdoor terrain.

You will find M tread in sizes like the 6.00-9 M Tread and the 18x7-8 M Tread, and in larger sizes like the 10.00-20 M Tread and the 12.00-20 M Tread.

M tread makes sense when:

  • Operators report the lift sliding or spinning on certain surfaces.
  • You run on a mix of concrete, asphalt and packed dirt.
  • The lift spends real time outside, not just crossing the dock.

A lift that slips is a safety problem, not just an annoyance. If your operators are compensating for poor grip, take it seriously.

M tread also comes in non-marking versions, such as the 21x8-9 M Tread Nonmarking and the 23x10-12 M Tread Nonmarking. You get the traction design without leaving marks on finished floors.

S tread: semi-traction for better wear

S tread is a semi-traction pattern. The product pages say it is designed to distribute weight evenly and reduce wear, which means longer-lasting tires and fewer replacements.

Think of it as the middle ground. More pattern than a smooth tire, but built for wear life rather than maximum bite. Sizes include the 7.50-10 S Tread, the 23x9-10 S Tread, the 27x10-12 S Tread, the 6.00-15 S Tread and the 300-15 S Tread.

S tread fits when:

  • The lift works mostly on paved or concrete surfaces.
  • You are going through tires faster than you should.
  • You need some traction but not an aggressive pattern.

S Click tread: S tread for click style wheels

S Click uses the same semi-traction approach as S tread. The difference is that it is designed for click style wheels. The product pages say this makes installation and replacement easier. When the tire wears out, you click it off and replace it, which cuts downtime.

Sizes include the 5.00-8 S Click, the 18x7-8 S Click, the 23x9-10 S Click, the 23x10-12 S Click and the 7.50-15 S Click.

One rule here. Only order S Click if your machine is set up for click style wheels. If you do not know what wheels you have, do not guess. Call us and we will sort it out with you.

O tread: smooth for the longest wear

O tread is the smooth pattern. The product pages say the smooth design gives the longest tire wear in short-distance applications.

Pay attention to the last part. Smooth tires do best on short, repetitive runs on good surfaces. Back and forth, lots of starts and stops. O tread shows up on bigger sizes like the 12.00-20 O Tread and the 12.00-24 O Tread.

O tread is a good choice when:

  • The lift stays on smooth concrete or paved surfaces.
  • Runs are short and repetitive.
  • Wear life matters more than grip.

It is the wrong choice for loose gravel, mud or uneven yards. A smooth tire on loose ground is asking for a slide. Use K or M there.

How to choose: four questions

This is how we walk people through it on the phone:

1. Where does the lift work? All indoors on smooth floors points to O or S. Mixed indoor and outdoor points to K. Rough or loose outdoor ground points to M.

2. What is wrong with your current tires? Wearing out too fast points to S or O. Slipping points to M. Feeling unstable with a load points to K.

3. Do floor marks matter? Food plants, retail space and finished floors should look at non-marking options.

4. What wheels do you have? Click style wheels mean S Click. Not sure? Ask before you order.

There is no single best tread. There is the right tread for how your lift is actually used.

Do not mix tread patterns on the same axle

This is a mistake we see a lot. One tire wears out, someone replaces it with whatever is in stock, and now there are two different patterns on one axle. Different patterns grip differently and wear differently. Keep the same pattern and size side to side on an axle so the lift tracks straight and wears evenly. If you are changing patterns, do the whole axle at once.

Know your rim width

Some sizes come in more than one rim width. We carry the 250-15 K Tread in a version for a 7.00 rim width and a version for a 7.50 rim width. Same size, same pattern, different rim. Check your rim width before you order. Otherwise you may end up with a tire that does not fit your wheel.

Practical takeaways

  • Read the full sidewall. The size, and sometimes the rim width, are molded on the tire you are replacing.
  • Check both ends of the lift. Front drive tires and rear steer tires are often different sizes.
  • Pick for where the lift is going. If it is moving to a new building or a new job in the next couple of years, choose the pattern for that work.
  • Buy the axle set. Replacing in pairs keeps the lift level and predictable.

FAQ

Which tread lasts the longest?

Per our product pages, the O tread smooth design is built for the longest wear in short-distance applications, and the S tread semi-traction pattern is built to enhance tire wear. Real life depends on your surfaces, loads and how the lift is driven.

Which tread has the best traction?

M tread. It is described as an interlaced traction design for grip across different surfaces. If slipping is the problem, start there.

Is K tread good indoors and outdoors?

Yes. K tread is built for maximum footprint and stability, which makes it a solid all-around choice for lifts that move between the warehouse and the yard.

Can I get non-marking in these patterns?

In some sizes. We carry M tread non-marking tires like the 21x8-9 and 23x10-12. Ask us about others.

What is the difference between S and S Click?

Both are semi-traction patterns. S Click is designed for click style wheels, which makes replacement quicker on machines set up for it.

Need help picking a pattern?

We are a direct warehouse distributor in Ontario, California, and solid tires are what we handle every day. If you are not sure which pattern fits your lift, contact us or call (909) 230-5552. We will help you match the size, pattern and wheel to your machine. You can also browse our full line of solid forklift tires or check our FAQ page.