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Hi,

I have Aurion AT-X, 2006 and currently using 215/60/16 tyres with alloys and thinking to inch-up to 17".

The alloy wheels I bought are from Lexus IS 250 with two 225/45/17 and another one is 245/45/17 and the other one is wheel only ( I reckon IS250 is rear wheel drive, so 225 for front and 245 for rear).

As the three tyres have road worthy treads, I think I will use the current tyres then buy the recommended size which is 215/55/17.

If I buy only one 245/45/17 tyre, can I use these tyres for my Aurion?

or if I need to use all same sized tyres, better buying two 225 tyres?

Many thanks

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225 or 245, there will be a difference compared to the 215 which will affect the reliability of the speedo. The difference will be marginal, but if you're not fussed then any of those sizes are fine. Bear in mind that the overall diameter will be lower compared to 215/55 series.

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215/55r17 or 225/50r17

depending on how wide the wheels are 235/45r17 an

standard o.d is 664mm can increase by 15 and decrease by 24

215/55r17 =668 mm

225/50r17 =658 mm

225/45r17 = 634 mm (to low)

235/45r17 = 644 mm

245/45r17 =652 mm

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so have questions.

1. should all tyres be same size?

all 225 or all 245?

can i use two of 225 and two of 245?

2. if i can, 225 for front? or 245 for front?

thank you.

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The 225/45r17 will be to small for the car (illegal) 245/45r17 are fine

i would recommand buy 2 other 245/45r17

run them all round

are the rims same size 17x8? or are the ones with the 225/45r17 only 17x7.5 ?

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