Tyre Size Advice

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shadowvg
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Tyre Size Advice

Post by shadowvg » Wed Sep 20, 2017 2:17 pm

Hi,

I'm a new BMW E87 LCI 118d owner, I've been lurking a little on this forum trying to gather as much info as possible.

One of the first changes I'd like to make is to change the current run-flats I have to non run-flats.

I have the BMW 256 Alloys and I have 205/50/17 tyres all round.

I'd like to purchase some Michelin CrossClimate+ tyres and have read on this forum that you can successfully install 225/45/17 tyres instead of the 205/50/17. The price difference between the two fitted is about 20% (£400 vs £500) which is a hefty saving for me.

Will I have any issues running the 225/45/17? I've just seen that they could be an issue at MOT time? Should I just bite the bullet and purchase the "correct" size?

Thank you for any replies!

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marco_polo
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Re: Tyre Size Advice

Post by marco_polo » Wed Sep 20, 2017 2:22 pm

No issues at all, pop them on.

Just make very sure the Load Index is at least 94, the 91's are too floppy.
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shadowvg
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Re: Tyre Size Advice

Post by shadowvg » Wed Sep 20, 2017 2:30 pm

Thank you marco_polo - appreciate the very quick reply!

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stevesurrey
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Re: Tyre Size Advice

Post by stevesurrey » Wed Sep 20, 2017 2:34 pm

I have the same wheels and a year ago swapped from 205/50R17 runflats to 225/45R17 normal tyres without any issues. Like you I found there was a significant price saving and more choice too. Car passed its MOT on Monday without any comment.
You might want to check with your insurer they OK with fitting non-standard tyres. Most dont seem to have a problem with it but best practise to tell them in advance.
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shadowvg
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Re: Tyre Size Advice

Post by shadowvg » Wed Sep 20, 2017 2:37 pm

Good point stevesurrey - I was just going to place an order with Costco, will call insurer first! Thanks for taking the time to reply.

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Re: Tyre Size Advice

Post by shadowvg » Fri Sep 22, 2017 2:06 pm

As an update to this, I had my tyres fitted at Costco yesterday.

They were a little "iffy" about fitting different size tyres but eventually agreed and all went smoothly. Car feels so much better!

Any recommendations on tyre pressure? The fitter used 31 psi all round which seems a little low.

Thank you.

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Re: Tyre Size Advice

Post by marco_polo » Fri Sep 22, 2017 2:36 pm

shadowvg wrote:
Fri Sep 22, 2017 2:06 pm
As an update to this, I had my tyres fitted at Costco yesterday.

They were a little "iffy" about fitting different size tyres but eventually agreed and all went smoothly. Car feels so much better!

Any recommendations on tyre pressure? The fitter used 31 psi all round which seems a little low.

Thank you.
Agreed, sounds a little low. I'd give 35 all round a go for a week, then fine tune to your liking.
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