Mechanic checking profitable tyre sizes and margins on a clipboard inside a tyre shop

The Tyre Sizes That Make You the Most Profit (And How to Spot Them)

Bytyreroom

đź•’ Read time: 4 minutes

Most tyre shops and mobile fitters stock what they think is “popular.”
But here’s the problem: popular doesn’t always mean profitable.

There are tyre sizes that sell fast but make you pennies — and there are others that move slower but give you great margin.

The key is knowing the difference. Let’s dig into how to spot the winners.

Not all fast sellers are equal

It feels good to move stock quickly. But if your top-selling size is only making £6–8 profit per tyre, are you really winning?

Instead, you want a mix:

  • High-turnover sizes for cashflow
  • High-margin sizes for profit
  • Repeat sizes for long-term customers (like fleets or trade clients)

Which tyre sizes are most profitable?

This varies by area — but here are a few patterns we’ve seen across the UK:

🟢 Good margin sizes (often):

  • 205/55R16
  • 225/40R18
  • 195/65R15
  • 225/45R17

These are common enough to stock easily, but also give flexibility in brand range and upsells.

đź”´ Tougher margin sizes (often):

  • Budget SUV sizes (e.g. 235/60R18, 255/55R18)
  • Cheap Chinese 4×4 tyres
  • Taxi or delivery van patterns (high wear, low margin)

These might move often, but can leave little room for markup — especially if customers are ultra price-sensitive.

How to spot YOUR top profit sizes

You don’t need fancy software to figure this out. Just:

  1. Look at your last 2–3 months of sales
  2. List the sizes you sold most often
  3. Write down what brand and pattern you sold for each
  4. Note your buy price, sell price, and profit per unit
  5. Multiply profit Ă— quantity sold

Now sort them by total profit. You’ll quickly see:

  • Which sizes make the most money
  • Which are high volume but low return
  • Where to focus your stock

It’s not just the size — it’s the pattern and brand

Example:
You sell 205/55R16 every day — but which version makes you the most?

  • Budget import? ÂŁ5 margin
  • Mid-range brand? ÂŁ12
  • Premium (when upsold)? ÂŁ20+

Use size to start the sale. Use brand and service to finish it well.

Don’t try to stock everything

You’re not a warehouse. You’re a business.

Focusing on your top 20% most profitable sizes will cover most of your demand.

For rare or low-margin sizes:

  • Order just-in-time
  • Let us (your wholesaler) carry the risk
  • Say no if the job’s not worth it — your time is valuable

Final thoughts

Want to make more money in your tyre business? Start with this simple truth:

👉 Know which tyres actually make you money.

Don’t just chase volume. Chase smart profit.

When you know your golden sizes — and keep them in stock — your cashflow and margins will thank you.

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