wheel sizes

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wheel sizes

Postby mr_grumble » Tue Jun 19, 2007 8:45 pm

Guys, need your opinion on the following matter.

My Paj runs 265/70/16 tyres which gives me a running radius of appprox 388mm.
I am looking at puting 235/70/15 tyres on our camping trailer. These will give a rolling radius of approx 355mm.

If worse comes to worse and I need an extra spare for the Paj, what negitive effects can I expect to encounter by puting the 235/70/15 on the Paj. I expect diff wind up will be the major one with the centre diff engaged, but what about in 2wd and 4wd high ?

Cheers,
Steve
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Postby Kramer » Tue Jun 19, 2007 11:05 pm

Diff wind up won't be too much of a worry if you only change one wheel on either axle eg if you get another flat (you should at least carry one spare for the car) say front drivers side replace the flat tyre with one from the trailer, the you get another unfortunate flat on the front passenger side. I would replace the front passenger side with a rear tyre rather than another trailer tyre as you will get center diff (transfercase) windup because the the front and rear have different rolling diametres. Now if you had a flat on the rear passenger tyre it wouldn't be a worry to replace it with the trailer tyre as it is on another diff and the transfer case won't get wound up. It still is not good to be running wrong size tyres on either side of a diff as one side of the diff gears is doing more work than the other so long term running like that will damage a diff, But it can be run like this for 100's of Kms without too much of a worry.
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Postby Blue Bravo » Wed Jun 20, 2007 9:29 pm

It would probably pay to run the same size tyres on the trailer if you can and there would be no problems and you would run with 2 spares.
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Postby mr_grumble » Thu Jun 21, 2007 1:39 pm

Ideally, yes, but Im working to a budget and do you think I can find a set of 16"x7" 6-stud wheels with or without 265/70/16 tyres anywhere for a reasonable price :***
If I fork out $1,200 I can get me a set of second hand alloys wrapped in Cooper ST's, but that's not about to happen soon ::()
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Postby Komodo@home » Wed Jun 27, 2007 12:55 am

cant even buy spare steel rims from a wreaker? or even a dealer?
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Postby mr_grumble » Wed Jun 27, 2007 8:15 pm

Prices were unreasonable, even for steelies :?

Ended up getting a set of next to brand new Sunraysias for $100

Just need to find tyres now.....
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