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Can I legally change the tyre size on my Mitsubishi Triton?

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My 2022 Mitsubishi Triton GLX came with 245/70R16 tyres. Can they be legally changed to a 265/R16 tyre using the original rims?

Broadly speaking, the law in WA states that you can’t increase the width of a car’s tyre more than 30 per cent over the standard fitment tyre. But since you’re only going 20mm wider, that’s not an issue and shouldn’t present any legal problems. However, it would still be wise to let your insurance company know about the increase as insurers often have different standards to the actual law-makers.

The only other hitch might be that the new tyre is physically too wide for the rim it’s being fitted to. Again, though, this is not a huge increase and should be viable. A good tyre shop will be able to check your rim size and let you know one way or the other.

Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.

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