Tyre sizes for Dmax/Rodeo/Colarado.

Submitted: Wednesday, Apr 21, 2010 at 18:48
ThreadID: 77905 Views:19983 Replies:4 FollowUps:3
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Hi,
I have a 2009 Isuzu Dmax dual cab 4x4 ute which is mostly the same as Holden Rodeo/Colardo Utes. A couple of tyre questions.

Can I fit 265/75 tyres without them rubbing on standard suspension height? Or should I stay at the lower 70 profile. They will be fitted to the standard steel 16x 7 in rim.

Alternatively perhaps go back to a 15 in rim and the old 10r size(31.5 r 15 ).
Advice from those who have gone down this avenue gratefully recieved.

Thankyou Alan.

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Reply By: Tonyfish#58 - Wednesday, Apr 21, 2010 at 21:05

Wednesday, Apr 21, 2010 at 21:05
Standard Tyre 245 70% 16 = 100k

Tyre Size 1 245 75% 16 = Size Difference 24.50 96.83

Tyre Size 2 265 70% 16 = Size Difference 28.00 96.40

Tyre Size 3 265 75% 16 = Size Difference 54.50 93.22

I went the 245/75/16 you could go the 265/70/16's - Note the above speedo readings - This is what you will see your speedo will read when you are actually doing 100k.

I see no need to go bigger than the 245/75/16's - In Qld you are only supposed to go 15mm Bigger and wider.

Cheers Tony
AnswerID: 413831

Follow Up By: 2000 Red Rodeo - Wednesday, Apr 21, 2010 at 21:49

Wednesday, Apr 21, 2010 at 21:49
I have a 2000 Hld Rodeo with 265/75/16's. However you need a 2inch lift to fit them. In my opinion it is well worth it but it also depends what you are looking to do with it.

Tony's comments re speedo are spot on. I rely on the GPS more for speed as a result.

Geoff
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FollowupID: 684026

Reply By: Member - TonBon (NSW) - Thursday, Apr 22, 2010 at 06:03

Thursday, Apr 22, 2010 at 06:03
I too have just put 265/75 R16 tyres on the original 16" alloys of my DMAX. They only fit because of the 2" suspension lift i have had done. Without that they would rub terribly. Interestingly my speedo started reading accurately after putting th etyres on however i rely on the GPS for my speed as well. One thing i noticed, i lost 1LT per 100Km in fuel efficiency, from 8 to 9 Lt per 100Km around town.
AnswerID: 413858

Follow Up By: Member - Oldplodder (QLD) - Thursday, Apr 22, 2010 at 07:53

Thursday, Apr 22, 2010 at 07:53
I think you might find you have not lost it.
Noticed the same on my pajero going from 29" to 32" tyres.

The speedo is not the only thing not reading correctly, odometer has also changed. For 100km between towns, my odometer reads just over 90km.

I am now doing 10% less kilometres on the odometer. :o)

10% or 9l/100k corrects back to almost 8l/100k.

If you are charging clients or the boss for milage, remember to correct. :o)




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FollowupID: 684055

Follow Up By: Member - TonBon (NSW) - Thursday, Apr 22, 2010 at 10:13

Thursday, Apr 22, 2010 at 10:13
Food for thought John, must admit when i noted the difference in speed i didnt think that it would affect the fuel usage readout as well. The D-MAX tells me litres per 110 k or Km's per litre in both real time and average over distance depending on what i ask it to tell me on the dash. However, i dont know how it calculates these figures so in fact you may be right, depending on how it works this out, i may not have lost as much fuel economy as i believe. Problem is, i wasnt taking actual note of litres in tank over certain K's, relying on the vehicle to tell me. Probably not smart in hindsight.
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FollowupID: 684073

Reply By: GoneTroppo Member (FNQ) - Thursday, Apr 22, 2010 at 07:17

Thursday, Apr 22, 2010 at 07:17
I put 245/75/16's as I didn't want to do any other mods.

Works well and gives it just enough by way of "longer legs" without compromising low end.

I have found over the years with a number of cars that unless you really have an abundance of power, too big an increase ends up working against you.
AnswerID: 413862

Reply By: westozal - Thursday, Apr 22, 2010 at 17:28

Thursday, Apr 22, 2010 at 17:28
Hi,
Thankyou for replying to my questions. Which tyres did you put on your Dmax in that size Tonbon ? Did you find a loss of drivabilty ? Do they still rub with the 2 in lift?
Thanks Alan.
AnswerID: 413924

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