Changing wheels on lowered van

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Changing wheels on lowered van

Postby mariner » 06 Jan 2018, 17:45

Hi all. I’m considering changing the standard steels on my van for alloys. As the van has been lowered does this affect how large I can go on the new wheels? I’m currently looking at a set of 18” on gumtree that has taken my fancy. I’m not necessarily planning on going this big but as the van was lowered by the previous owner, I’m not sure by how much, I figure this is something I need to take into account.

Also, what is best to do about the spare? Most sets seem to be sold as four and I’m assuming if I increase the wheel size there’s no point traveling with a 14” steel underneath!

Thanks for any advice.
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Re: Changing wheels on lowered van

Postby shepster » 06 Jan 2018, 22:57

In theory whatever size wheels you fit the overall diameter of the wheel/tyre combination should be the same as the original.

Just use any tyre/wheel calculator to work out what size tyres you need for an 18" wheel.

As for the spare, if the new wheels are the same overall diameter as the original the standard spare will be ok.
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Re: Changing wheels on lowered van

Postby ajsimmo » 07 Jan 2018, 10:12

I gather you meant the overall wheel/tyre diameter being the same?

Anyway, a lowered van on 18" wheels with tyres with a low enough profile to have the same rolling radius as standard would very probably be a very harsh ride and awful to drive. I know from experience, because I get to drive a few.

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Re: Changing wheels on lowered van

Postby ajsimmo » 07 Jan 2018, 10:40

So having had a look, it seems that the nearest to a match I can find in common tyre sizes is 215/55R18 against a 205/80R14 on the steel spare (1.5% difference in circumference). The handling would be unpredictable, and I wouldn't recommend it.

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Re: Changing wheels on lowered van

Postby mariner » 09 Jan 2018, 10:58

Hi guys
Thanks very much for your advice, its really helpful. Don't think I'll go as big as 18'' but good to know about that upsizing to some degree shouldn't be a major problem. Thanks for the advice on the spare as well - if I've read it right it seems it shouldn't be a problem to keep it as long as the rolling radius matches that of the new wheels (although 18'' seems too big for this mind).

Thanks again and let me know if I'm off the mark!
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Re: Changing wheels on lowered van

Postby crazydiamond » 10 Jan 2018, 10:12

Well I changed to 7.5 x 16 Mercedes Toliman alloys with 215 60 16 tyres and it rides and handles better than the standard setup. Gearing is almost identical and the old 2litre Aircooled works well with it. It looks "right" as well.
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Re: Changing wheels on lowered van

Postby scottbott » 10 Jan 2018, 13:56

I have Scorpio Cosworth wheels ("16')' with 255-55 tyres fitted, that is the size that was on the van when I bought it so when I replaced the tyres I got the same size, never driven another van so have nothing to compare it to, it was also lowered 2'' and stiffened up by Brickwerks by the previous owner does not like potholes as it crashes a bit but other wise very happy with it
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