Tyre size when moving from 15" to 16" wheel

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Morning all, sorry for adding another tyre related thread to the forum.

I currently have a Peugeot Boxer based PVC plated at, and ran at, 3,500kg (so effectively a Ducato van base).
It currently has 15" steel wheels with 225 / 70 / R 15 C 112/110S tyres on it.

The tyres are now very old and need replacing but, mainly for aesthetic reasons, I would like to upgrade to 16" alloy wheels as I think my existing wheels look too small for the van / wheel arch as per photo.

I fully apppreciate that I need to ensure that both the new wheels and tyres are correctly load and speed rated but looking at all the options is making my head hurt. I do not really have too many options for local wheel/tyre suppliers so think I will end up ordering them all online and having to work it out myself (hopefully with the assistance / advice of Funsters).

So far I believe that I could fit 16" alloys along with either 225 / 65 tyres or 215 / 70 tyres as that is a relatively small overall size change (3mm to 13mm diameter increase).

Would I be likely to be able to go to 215 / 75's at 33mm bigger ? Obviously I am aware that if the wheel/tyre combo is too large it could catch on bodywork, wheel arch, trim etc. There are more options if I could add 215 / 75 to the equation.

Also would the width decrease from 225mm to 215mm make much real world difference ? Would it be noticeable to me ? Should I try to stick with 225mm ?

When it comes to tyre choice I would like to go more towards the "all terrain" & "all season" variety which is where I seem to struggle with tyre size options.

Incidentally, and I know the tyre isn't to everyone's liking, but when I do look at something like the BFG K02 in 225 / 70 then the load index is 102 which I believe to be 850kg x 4 = 3,400kg therefore too low for my PVC. I also believe that this is the much vlogged about "Gadget John" tyre so why is he running on them if they are 100kg under rated ? Is he just chancing it ?

Sorry, I know there is no one true tyre - however my first issue is to determine what tyre size I can / should be looking at and then I will worry about the actual choice between K02, Grabber, Agilis Cross Climate, Toyo, Conti etc. etc.

My van is also my run around vehicle so it gets used regularly and so the tyres don't need to survive weeks in storage.

Thanks .

Wheel.jpg
 
Tyres are recommended to have a 10% extra capacity over the axle load figure. Changing to a bigger rolling circumference will impact marginally on your gear ratios and probably your speedo accuracy.
Why would that be where those is already a safety factor built in?

A1250kg tyre isn't going to pop when it reaches 1300kg - 2500kg perhaps!
 
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I’ve not looked either - I assume worst case scenario is to stick “any old” tyre / wheel combo as a spare as long as it’s similar overall height.
If you travel in France or Spain well worth getting a matching tyre as tyres have to be the same on the same axle. If you have a blowout & your spare doesn't match you will have to buy 2 tyres if they can't get one the same and the chances are they won't be what you want.
 
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pjay , Here are the new wheels and tyres on the van.
All seems fine with those but I do have an issue with my wheel bolts so I think I will put that in a new thread.
 

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pjay , Here are the new wheels and tyres on the van.
All seems fine with those but I do have an issue with my wheel bolts so I think I will put that in a new thread.
Thanks, they do look good. 👍

Pete
 
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