35 inch muddys on a troopy

Submitted: Thursday, May 06, 2010 at 21:35
ThreadID: 78269 Views:5251 Replies:6 FollowUps:0
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G'day all. I am looking at putting 35 inch or 315 \85 on my 03 troopy. I have fitted an after market turbo and get about 19 lts to the 100 kms when towing my fairly heavy camper trailer. I was wondering if the larger tyres will hurt my fuel econemy which is not all that great or should I just stick with ths 33 s.
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Reply By: Ozhumvee - Thursday, May 06, 2010 at 21:49

Thursday, May 06, 2010 at 21:49
I would imagine they will as you are effectively changing the gearing. Wouldn't imagine it would be much though.
You will likely notice it isn't as quick off the mark and hills might slow you down a bit more as well.
Increasing the width of tyres usually makes a bigger difference as it increases the rolling resistance as does tread type, the more aggressive the tread the greater the rolling resistance.
Peter
1996 Oka Motorhome

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AnswerID: 415673

Reply By: Rockape - Thursday, May 06, 2010 at 23:20

Thursday, May 06, 2010 at 23:20
I would first check if they would fit, I don't believe they would fit on my old girl.

I run 285/75/16's and they don't touch but I think anything else would without a body lift and maybe offset rims.

Fuel will only get worse as Peter said, you also will be changing down quite a bit more.

AnswerID: 415685

Reply By: Snowy 3.0iTD - Friday, May 07, 2010 at 09:01

Friday, May 07, 2010 at 09:01
I have not upgraded to 35' tyres before, but have gone from the standard 31" tyres on Patrols and Cruiser to 33" tyres and kept fuel consumption data. I have found (not saying this is the case for all vehicles) going to larger tyres does not affect the fuel consumption a great deal, but 35's may be different. Going from AT tread to MT tread does increase the fuel consumption a bit.

Snowy
AnswerID: 415707

Reply By: ross - Friday, May 07, 2010 at 11:08

Friday, May 07, 2010 at 11:08
35s usully rub on the rear of the front wheel arch. It can be cured with a hammer.
IMO 33s are the perfect tyre to run on 75 series.

What sort of EGTs are you pulling now?
AnswerID: 415717

Reply By: Member - Leigh (Vic) - Friday, May 07, 2010 at 13:57

Friday, May 07, 2010 at 13:57
You may also find an increase in braking effort is required to overcome the loss of braking effectiveness caused by a larger rolling diameter wheel. Only an issue if you need to quickly stop though!! Cheers
AnswerID: 415729

Reply By: Member - Mark E (VIC) - Friday, May 07, 2010 at 18:58

Friday, May 07, 2010 at 18:58
It may also not be legal...... ;-)

Cheers,

Mark
AnswerID: 415760

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