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fekete



Member Since: 24 Dec 2008
Location: Here on the other end of the computer
Posts: 3626
United Kingdom 2007 Defender 90 Puma 2.4 HT Bonatti Grey
nikojo wrote:
I agree with everything said but it is "off" almost twice that amount.

Before I installed the tire I noticed it was fairly smaller than what I "calculated" based on the stated size. Apparently there are differences from manufacturer to manufacturer.

This is on a Puma.


What was the stock tyre size on before ? NEVER TAKE LIFE SERIOUSLY. NOBODY GETS OUT ALIVE ANYWAY
Post #102861 27th Nov 2011 8:44pm
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nikojo



Member Since: 06 Aug 2011
Location: Madrid
Posts: 75
They were K2's. Will have to check the size when I get home. Don't think they came with the OEM truck. They were on one-ton wheels.

For all I know the truck was "off" on the speedo when I initially got it before making tire/wheel switch. I just never had the GPS to prove it until now.

I was disappointed mostly because I thought my fuel consumption was "ok" before but now it seems rather poor.

I drive 70% highway and definitely have a heavy foot with an Alive tune for mixed performance/mileage (highly recommend). I get between 17-20 MPG. Thought I would get a lot more.

By the way, when you guys refer to "gallon" are most people talking "imperial"???????
Post #102875 27th Nov 2011 9:07pm
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fekete



Member Since: 24 Dec 2008
Location: Here on the other end of the computer
Posts: 3626
United Kingdom 2007 Defender 90 Puma 2.4 HT Bonatti Grey
Hi again, i've put bigger tyres on... i'm running 33/12.50/15 and my speedo is just 1 mph over on the satnav Shocked
so mine also must have been out when set at the factory ?
I don't find it a problem to be honest but some guys like yourself like it right Thumbs Up

Also have the Alive remap Bow down NEVER TAKE LIFE SERIOUSLY. NOBODY GETS OUT ALIVE ANYWAY
Post #102885 27th Nov 2011 9:21pm
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K9F



Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610
United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey
nikojo wrote:
By the way, when you guys refer to "gallon" are most people talking "imperial"???????


Definately!!! What else would we be referring to???

fekete wrote:
Hi again, i've put bigger tyres on... i'm running 33/12.50/15 and my speedo is just 1 mph over on the satnav Shocked Bow down


Karlos (above) has a link to a brilliant calculator that helped me no end in deciding which wheel/tyre combo to go for to retain original rolling radius.

Karlos I think manufacturers always err on the side of caution and make the speedos over-read a little at higher speeds rather than under-read to prevent them from being sued in the event of speeding fines. Both my Landy and the Mini over-read in comparison to the satnav, the Mini by 2-3 mph and the Landy by 2 mph.

Thumbs Up If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!
Post #102889 27th Nov 2011 9:29pm
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fekete



Member Since: 24 Dec 2008
Location: Here on the other end of the computer
Posts: 3626
United Kingdom 2007 Defender 90 Puma 2.4 HT Bonatti Grey
Cheers Mal, Thumbs Up

Here is the link to the calculator
http://www.miata.net/garage/tirecalc.html NEVER TAKE LIFE SERIOUSLY. NOBODY GETS OUT ALIVE ANYWAY
Post #102892 27th Nov 2011 9:32pm
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richuk



Member Since: 13 Nov 2011
Location: Dorset
Posts: 201
United Kingdom 
K9F wrote:
nikojo wrote:
By the way, when you guys refer to "gallon" are most people talking "imperial"???????


Definately!!! What else would we be referring to???


I presume nikojo is referring to US Gallons Rich

semper in excretia sumus solim profundum variat

Last edited by richuk on 27th Nov 2011 10:43pm. Edited 1 time in total
Post #102894 27th Nov 2011 9:37pm
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nikojo



Member Since: 06 Aug 2011
Location: Madrid
Posts: 75
Correct.....US gallons.

That makes me feel a little better as some of the mileage threads refers to Better gas mileage and so I thought mine was really bad. But when accounting for the 20% more volume my gas mileage seems to be right on.
Post #102917 27th Nov 2011 10:14pm
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