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Thread: Question on 32" tires and gearing...

  1. #1
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    Question on 32" tires and gearing...

    Hey Guys and Girls hope you can help me out here...

    I have a 96 300tdi manual and I'm looking at getting it set up for touring. I have grand plans for the old girl when the funds and time allows however the current hiccup lay in what size tires will work.

    I'm set on a 2" lift which will be in before I order the wheels. after trawling through so, so, so many posts I'm pretty set on 235/85R16 in an AT (either ST MAXX if they come down in price or BFG's). They will be going on the standard disco alloys if they don't fowl up to much with the steering components.

    My question is will the standard gearing be OK for touring or will I need to look at changing it? She is a sluggish beast at the best of times and I think that the wheels may push it over the edge....

    Uprated Allisport inter-cooler is on the cards but I would like to get the tires sorted first to start getting out and seeing more of the country.

    Cheers,

    KC

  2. #2
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    I've used 235/85/16s on both a Diesel and Petrol and IMO wouldn't bother changing gearing.

    The Diesel was an auto
    Petrol a manual, both handle it fine.

    Rez

  3. #3
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    If its mainly a touring vehicle, then a Defender transfer case will bring your high range back to standard, low range stays the same. You can also buy the transfer gears from Ashcroft.

  4. #4
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    I was looking into a defender transfer swap but seems quite involved. I'm trying to do as much work as I can myself to keep the costs down and learn about the car...

    Would it just be a matter of replacing the ratio gearing or does the whole box need to come out and be replaced?

  5. #5
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    I have 265/75-16 on my 96 300TDI. Its no race car, but i wouldnt say its a slug. with a bit of gear in her it may be a differnt story tho i suppose.



    PS. On standard rims, with 2" lift, the tyres foul on the radius arms at full lock, and small chop of the rear guards was also required.
    Last edited by CU55TM Disco; 13th September 2012 at 09:15 PM. Reason: PS.

  6. #6
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    Quote Originally Posted by KCJones View Post
    Uprated Allisport inter-cooler is on the cards
    I fitted a full width one to my TGV (2.8) engined Disco - you won't be disappointed.


  7. #7
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    Have you had any adjustments made to the fueling or turbo? This will help without the intercooler upgrade. I ran 235/85s on my 200tdi and it handled them reasonably well with the turbo and fuel pump adjusted and a larger free flow exhaust. It was a bit sluggish on steep hill starts in high range and I never carried a full touring load so I can't comment on that. I'd only bother changing gearing if going 33s or larger.

    Pete

  8. #8
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    its up to personal opinion

    some think it is ok. i hated mine on 235/85/R16 with standard gearing.
    if you are set on that tyre size, give it a try. do a short trip and then decide about the gearing.

  9. #9
    DiscoMick Guest
    I've just fitted 245/75/16 MTRs on steels on my D1, which has a 50mm lift, and haven't noticed any difference to the gearing, but they are rubbing slightly on full lock. It never was a rocketship, of course. When I got the front wheels balanced today the tyre shop advised that 245/70/16s shouldn't rub, if I go that way in future.

  10. #10
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    Quote Originally Posted by discopete View Post
    Have you had any adjustments made to the fueling or turbo? This will help without the intercooler upgrade. I ran 235/85s on my 200tdi and it handled them reasonably well with the turbo and fuel pump adjusted and a larger free flow exhaust. It was a bit sluggish on steep hill starts in high range and I never carried a full touring load so I can't comment on that. I'd only bother changing gearing if going 33s or larger.

    Pete
    I didn't see the point in tweaking the fueling before adding an intercooler... does it really make that much of a difference to performance? Not that I want a rally car but I would like to join traffic without the fear of being T-Boned!

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