Larger tyres

Submitted: Sunday, May 08, 2005 at 10:30
ThreadID: 22765 Views:1846 Replies:3 FollowUps:9
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Have a 60 series T/Diesel currently fitted with Bridgestone 693 31X10.50X15 AT tyres. Can anyone advise as to the next size up to bring the wheel height back to the original 16" height as per original specs without changing rims. I would also imagine with the current tyres that the true speed would be slower than the indicated speed. Would a larger tyre also increase vehicle height by the equivelant 1".
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Reply By: Utemad - Sunday, May 08, 2005 at 10:40

Sunday, May 08, 2005 at 10:40
I think between 32in and 33in is where a 7.50x16 sits.
Depends if you have 15x7 or 15x8 rims. If they are 7in wide then you can't go wider than a 10.5in tyre.
I know you can get a 33x10.5 BF Goodrich. Don't know about 32in or other brands etc.
You would want to check the offset too. Larger diameter tyres may foul something.

As for height gain you will get half of the increase in diameter in height. As only half of the tyre is under the axle. So going from a 31 to a 33 will get you 1in height in theory. As not all tyres physically measure what is stated on the sidewall.
AnswerID: 110275

Follow Up By: sang - Sunday, May 08, 2005 at 14:51

Sunday, May 08, 2005 at 14:51
Hi,
2x7.5"+16"=31", I think the 31 inch is the original height.
Regards
Sanga
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FollowupID: 366824

Follow Up By: Utemad - Sunday, May 08, 2005 at 15:10

Sunday, May 08, 2005 at 15:10
That is very true. I guess it just depends on the physical size.
I have a set of 31in tyres that measured 30.1in brand new and my brothers 7.50x16 tyres stand more than 1in taller than my them.
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FollowupID: 366826

Follow Up By: Truckster (Vic) - Sunday, May 08, 2005 at 19:12

Sunday, May 08, 2005 at 19:12
31inch tires will always be 31inch high, doesnt matter if they are in 1inch rims.
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Follow Up By: Utemad - Sunday, May 08, 2005 at 22:35

Sunday, May 08, 2005 at 22:35
No kidding Truckster. What's your point???
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Follow Up By: Truckster (Vic) - Sunday, May 08, 2005 at 23:18

Sunday, May 08, 2005 at 23:18
Im actually answering his question from the original post in 1 easy to read and understand line.

Remember the question
"Can anyone advise as to the next size up to bring the wheel height back to the original 16" height as per original specs without changing rims."
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FollowupID: 366905

Follow Up By: Utemad - Tuesday, May 10, 2005 at 07:31

Tuesday, May 10, 2005 at 07:31
In regards to the 7.5x2+16=31 above. 7.5 must be the width. As a 7.5x16 is commonly talked about as a 32+in tyre and they are definately taller than my 31s.

So to answer the question asked below about what tyre to buy to fit on you existing rims to regain the factory tyre height/diameter whatever..........see my reply above.
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FollowupID: 367049

Reply By: Shane (QLD) - Monday, May 09, 2005 at 10:11

Monday, May 09, 2005 at 10:11
Thanks for the answers, but would still like to know if 31" is the correct height for 16" rims.
AnswerID: 110398

Follow Up By: Truckster (Vic) - Monday, May 09, 2005 at 13:39

Monday, May 09, 2005 at 13:39
Im not sure I understand what your Asking

31x15 is the same as 31x16 in height. and you can get 31 in a 15 or 16.

The car will be the same height, you will be legal with one as you would with the other.

You can run many different size tires on 15inch rims - up to 52inch tires!

If your asking what WIDTH tire you can run on a 15inch rim, that depends on the WIDTH of the rim.

They usually come in 6, 7, 8, or 10 inch wide.
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FollowupID: 366949

Follow Up By: Shane (QLD) - Monday, May 09, 2005 at 16:16

Monday, May 09, 2005 at 16:16
I guess what I am asking is that if you put the original tyre & rim that the vehicle came out with against the one I'm using now, is it the same. In other words if I roll the two tyres one revolution, do they go the same distance ?
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FollowupID: 366980

Reply By: Johnty - Monday, May 09, 2005 at 21:45

Monday, May 09, 2005 at 21:45
Gday Shane,

I found this site usefull when comparing different tyre diametres.


Johnty
AnswerID: 110538

Follow Up By: Johnty - Monday, May 09, 2005 at 21:47

Monday, May 09, 2005 at 21:47
That didn't work too good, I'll work out how to put in a link one day.

www.tyresave.co.uk/tryesize.html
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