750 tyres on defender 90

Hi all ! happy new year .
In need of info ?
I have just changed my tyres from standard to 750s & I am lead to believe
that I will get better fuel consumption.
Can any one tell me how much difference it will make & also how far out it
will put my speedo ( do I need to have it re-calibrated.
Many thanks,
Aggis

In article <[email protected]>, Aggis
<[email protected]> writes
>Hi all ! happy new year .
>In need of info ?
>I have just changed my tyres from standard to 750s & I am lead to believe
>that I will get better fuel consumption.
>Can any one tell me how much difference it will make & also how far out it
>will put my speedo ( do I need to have it re-calibrated.


HI

In theory you can fit the speedo drive gear from a 110 ( located in the
transfer box at the end of the speedo cable) a ten second job.

In practice check the accuracy by what ever way you feel fit, I used a
gps, I found that when I went from 205/16 to 33x12.50 R15 my speedo
actually became accurate. But the odometer now under reads.
--
Marc Draper

Forsale

1998 110 tdi Pick up 65,000 miles
1994 discovery commercial 100,000 miles
1993 200 tdi 3door discovery 130,000 miles.
1997 300 Discovery XS 65,000 miles

Super winch X9 + genuine Landrover fitting kits for 200 Disco.

So marc was, like

> In article <[email protected]>, Aggis
> <[email protected]> writes
>> Hi all ! happy new year .
>> In need of info ?
>> I have just changed my tyres from standard to 750s & I am lead to
>> believe that I will get better fuel consumption.

> I found that when I went from 205/16 to 33x12.50 R15 my speedo
> actually became accurate.

Same here. Your speedo probably over-reads as standard, and bigger tyres
can make it read correctly. Check first. And don't expect too much in the
way of improvement to your fuel consumption. The only savings you could
expect are from the small reduction in friction losses within the engine and
transmission due to lower engine speeds, but I doubt if it would enough to
be measurable. You may even find it gets worse, as you are having to change
down more often. Big wheels are good, but not as an economy device. Don't
forget that bigger tyres will affect the distance recorded, and hence your
*apparent* fuel consumption.

--

Rich

Pas d'elle yeux Rhone que nous