245/40R20 Tyres | 2454020
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245/40R20 is a low-profile size for prestige and performance cars on 20-inch wheels, giving crisp steering and a planted feel at speed. We list 47 tyres in this size from $207.
The size decoded
- Width: 245 mm.
- Sidewall height: 40 per cent of the width, about 98 mm.
- Wheel: 20 inches, or 508 mm.
- Overall diameter: about 704 mm, or 27.7 inches.
- Typical rating: 99 load index (775 kg per tyre), with W (270 km/h) or Y (300 km/h) speed ratings.
Versions to match
- Extra load: 32 of the 47 are XL. Replace XL with XL.
- Run-flat: seven are run-flat. Don't mix them with conventional tyres. See all run-flat tyres.
- Electric vehicles: eight are EV-labelled, including the Michelin e.Primacy. Browse EV tyres.
- Approvals: several carry BMW or Mercedes-Benz marks, and one carries a Maserati approval.
Which tyre for your car
- Pirelli P Zero (PZ4) has the most options in this size and suits prestige performance cars.
- Continental ContiPremiumContact 6 puts comfort first.
- Michelin Pilot Sport 4 S and Yokohama Advan Apex V601 are the picks for maximum grip.
- Bridgestone Potenza S001 adds a run-flat option in this size.
Before you buy
- Check the rear size separately if your car is staggered.
- Match any approval mark on your current tyres.
- Take care with kerbs and potholes. A 98 mm sidewall offers little protection for the rim.
Each price covers fitting, balancing, a tubeless valve, disposal of the old tyre and GST. Low-profile tyres need careful handling on the fitting machine, and your Bob Jane T-Marts store fits them every day.
Looking after low-profile tyres
- Check pressures monthly. A short sidewall hides under-inflation.
- Park clear of kerbs, which scuff both tyre and rim.
- Inspect for bulges after a pothole impact.
- Book an alignment check if the car pulls or the steering wheel sits off-centre.
Common questions
Why does this size ride firmly?
A short sidewall flexes less, so more bumps reach the cabin. Correct pressures help.
Is this a performance-only size?
No. It also suits comfort and EV tyres, as the performance tyres range and this page show.
Can I fit run-flats to a car that came on standard tyres?
Yes, if the size and ratings match, but expect a firmer ride. Most owners stay with conventional tyres and a spare or repair kit.
What speed rating do I need?
At least the one on your placard. Options in this size include W and Y ratings.
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