Pathfinder Tyres (75 profile)

Submitted: Thursday, Jun 03, 2004 at 19:53
ThreadID: 13436 Views:4028 Replies:4 FollowUps:21
This Thread has been Archived
Hi,
has anyone tried fitting 245 x 75 x 16 tyres on their Pathfinder?
My local tyre distributors think its very do-able - potential advantages:
- Increases the gearing (lower revs) for long trips
- Increases ground clearance
- Access to a range of relatively economical light truck AT tyres such as Yokohama, Goodyear etc with a higher load rating while still retaining the S speed rating.
I'd like to know if anyone has actually done it? and would they do it again?

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Reply By: Mrs Diamond - Thursday, Jun 03, 2004 at 19:56

Thursday, Jun 03, 2004 at 19:56
potontial disadvantages.
illegal in most if not all states with out an engineers report.
uninsured if you have an accident.
no 3rd party insurance in you hit someone.
AnswerID: 61556

Follow Up By: Carefree - Thursday, Jun 03, 2004 at 21:16

Thursday, Jun 03, 2004 at 21:16
Thank you for that advice Mrs Diamond - I'll check that with the NRMA.
Must admit I had assumed the two tyre dealers I spoke to would know whether it was "legal". Purhaps its only legal in NSW? Can you give me the source of your information please so that I can raise it with the Tyre guys.
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Follow Up By: Truckster (Vic) - Thursday, Jun 03, 2004 at 22:46

Thursday, Jun 03, 2004 at 22:46
Carefree what state are you in?

Most are going with 75 series, IM lookin at g011+11's for wifes car or toyo opats. its a pathy, going 245x75, depending on the brand of tire, is to if its illegal.
Then again Diamond worked for tire place for yonks he SHOULD know

search archives, or the last 4-5 pages here, heaps on them
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Follow Up By: Member - Rohan K - Friday, Jun 04, 2004 at 13:54

Friday, Jun 04, 2004 at 13:54
Sorry Mrs Diamond - you're wrong on that one.

Carefree, do a search - Truckster has asked all the Pathy tyre questions, and received all the answers you need.

BTW, Carefree, don't believe a word a tyre dealer/shop tells you. They generally know absolutely nothing about the regulations that govern their industry, and seem to care less.
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Reply By: Member - Moggs - Friday, Jun 04, 2004 at 07:26

Friday, Jun 04, 2004 at 07:26
Carefree, I have Cooper ST 245/75/R16's on my Pathy, and they are legal. They are great and I would definitely do it again. The only real issue I had was that the larger spare tyre was a tight fit back underneath, but it really wasn't too difficult to get it in under there. Rohan K (PCoA President and authority on all things Pathy)spent considerable time liasing with the authorities on this and received written confirmation that it is kosher.

For any Pathfinder related info check out the Pathfinder Mods and Stuff thread on the Overlander forum - or direct your query via the Pathfinder Club of Australia website - www.pcoa.org.au

We are a friendly helpful bunch....and would welcome another Pathy owner into the fold - there is plenty of info on the tyre query there.
AnswerID: 61610

Follow Up By: Truckster (Vic) - Friday, Jun 04, 2004 at 09:41

Friday, Jun 04, 2004 at 09:41
HMmmmmmmmm hadnt thought about the spare being an issue..
When you say tight, in height of tire or width?
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Follow Up By: Member - Rohan K - Friday, Jun 04, 2004 at 13:57

Friday, Jun 04, 2004 at 13:57
Diameter Truckster.

You have to deflate the spare to about 20 to 25 psi to get it to fit.

Oh, and another thing Carefree - you may reduce revs slightly with the larger tyres but you will actually get worse fuel consumption around town.
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Follow Up By: Member - StevenL - Friday, Jun 04, 2004 at 18:57

Friday, Jun 04, 2004 at 18:57
Truckster,

I had the same thing with the Coopers on the Prado. The spare fits in a set-in section on the back door. The almost 1" increase in diameter means that the spare is now a really tight fit in this space. The back windscreen wiper almost touches the tyre where there was plenty of space before. I have not had to let the tyre down to fit it though! Seems a bit radical. OK if you have your compressor along I suppose. Guess I'll have to increase the priority on that. So many accessories to buy...so little cash!

I hear that the Pajero really suffers from this issue as the space was pretty tight even for the regular spare!!

Steven
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Follow Up By: Member - Moggs - Friday, Jun 04, 2004 at 19:14

Friday, Jun 04, 2004 at 19:14
Dropping the spare to 25psi is not really an issue. They are a 10 ply tyre and will handle the drive on the bitumen to the nearest servo at that pressure if I get a flat around town. As for out in the bush - I would never head off the bitumen without a compressor so it doesn't matter. If you go the ST's you need to be careful with pressures to protect the expensive investment - if you don't they will chip up badly (but lets not start that discussion again!)
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Follow Up By: Truckster (Vic) - Friday, Jun 04, 2004 at 21:53

Friday, Jun 04, 2004 at 21:53
GQ can hold a 35 on the back door from a 31 stocky :(

I agree Moggs, droppin pressure is not an issue. Even a cheapy compressor ($40 supercheap) would suit the application well for how often it would be used..

My rodeo ute had 2 flats in 10 yrs... one was cause I ran over broken glass that fell off a truck at a round about..
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Reply By: Mrs Diamond - Friday, Jun 04, 2004 at 12:48

Friday, Jun 04, 2004 at 12:48
gday.
after checking tyre diameters for you hers what i came up with.
a 245/70/16 has a diameter of 749mm
a 245/75/16 has adiameter of 771 mm
a total increas of 22 mm.
in vic and nsw the maximum legal increas in diameter is 15mm.
do not get it confused with rim increase of 25mm.
i believe truckster just had a run in with a big well known tyre company with them saying they didnt know anything about 15mm.
i was in tyres for years i just recently got out.
im also a licencesed roadworthy insector.
hope this helps
AnswerID: 61660

Follow Up By: Member - Rohan K - Friday, Jun 04, 2004 at 14:08

Friday, Jun 04, 2004 at 14:08
I have NSW RTA confirmation that the theoretical tyre sizes stated above are irrelevant.

The basis of this is the wording "largest wheel/tyre" which the RTA agreed means, in actual measurement, the largest possible size for a 245/70/16. This happens to be 759.7 mm.

They also agreed that this meant the largest wheel/tyre that could be fitted is 774.7 mm (rounded to 775 mm).

245/75/16 tyres can come in any size between 763 mm and 784.9 mm. My Cooper STs are 775 mm (according to Coopers). Again, the theroretical sizes are irrelevant and any tyre that gives an overall diameter of not more than 775 mm, may be fitted, including a number of 245/75/16 tyres.

All of this pre-supposes, of course, that also comply with the regs regarding increase in width, as well as min. load and speed ratings.
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FollowupID: 323149

Follow Up By: Truckster (Vic) - Friday, Jun 04, 2004 at 16:04

Friday, Jun 04, 2004 at 16:04
I think it depends on if you go for individual tire sizes over going for a across the board measurement. EG 245/70, 245/75 etc etc against ACTUAL MM's on the tire.

If they stated that a 245/70 was a maximum of X then it would be easier.

Lookin at rohans figures, some 245x70s are bigger than 245x75s!! So if I went for brand M that are 774.7 in a 245x70 would that be illegal?

Do they work on the OEM fitted tires as a figure to go off? EG Bridgestone HT's....?
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Follow Up By: Member - Rohan K - Friday, Jun 04, 2004 at 19:40

Friday, Jun 04, 2004 at 19:40
Truckster, you shouldn't find a 245/70 larger than 759.7 mm. A 774.7 mm 245/70 would be well outside the manufacturing standards and therefore, I assume, illegal to have made in the first place.

However, manufacturing standards aside, the DOTARS and RTA regs allow you to fit any sized (in mm) tyre that is in the same "class" (e.g 245/70) as the largest wheel/tyre combo indicated on the tyre placard.
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Follow Up By: Mrs Diamond - Friday, Jun 04, 2004 at 19:59

Friday, Jun 04, 2004 at 19:59
ill agree to disagree rohan.lol
nsw laws are slightly different from vic roads in regards to different tyres from different manufactures.
the sizes i gave above are from the cooper tyre size guide i used this as a guide because its the only site i know off hand with sizes .lol
in victoria we use a rim and tyre guide to find out the diameters of tyres i didnt have that handy.in vic what ever size it states for a vehicle is what we work off plus/minus 15 mm.i
i had a disagreement with a vic roads engineer over the diffe3rent size tyres that different manufacturers use and where one tyre might come in at 14mm and another might come in at 16mm it is illegal to fit the 16mm tyre stupid i know but they dont see it that way.
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FollowupID: 323197

Follow Up By: Truckster (Vic) - Friday, Jun 04, 2004 at 22:40

Friday, Jun 04, 2004 at 22:40
Rohan.
Im lookin at these
Yokohama G011+II's Had another look at them today, and they are a Very nice lookin tire!!! :D 782mm OD :(

The other one SD05 WAY more aggressive than the photo looks, and both are around $200 F&B! But you can only get 255x70 at 740mm

Although I got the Toyo OPATS downt o $180ish, I like the look of the Yokos.. Not sure how they will wear though.. Thats also in a 245x75
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Follow Up By: Member - Bradley- Friday, Jun 04, 2004 at 23:13

Friday, Jun 04, 2004 at 23:13
Where are you at now Jim, still working in Bendigo, or have you 'retired' ??
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Follow Up By: Member - Rohan K - Saturday, Jun 05, 2004 at 13:32

Saturday, Jun 05, 2004 at 13:32
Truckster, the 265/70/16 SD05 is only 3 mm too big :)
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Follow Up By: Truckster (Vic) - Saturday, Jun 05, 2004 at 21:32

Saturday, Jun 05, 2004 at 21:32
Dont really want much wider, want higher for clearance.. 245 is a good size I reckon..

Now which one to go with :(
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Follow Up By: Mrs Diamond - Saturday, Jun 05, 2004 at 21:45

Saturday, Jun 05, 2004 at 21:45
so mr truckster can you fit 75 series legally in vic lol
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Follow Up By: Member - Rohan K - Sunday, Jun 06, 2004 at 12:02

Sunday, Jun 06, 2004 at 12:02
The answer to Mrs Diamond's question is "Yes" but exactly which one and how big depends on whether Vic will accept the same argument as NSW re including the 3% manufacturing variance in the calcs. If they don't, you will have to do a hunt for the largest available 245/70 you can actually buy I'll have to dig through my records but I recall having located a model that was 25? mm), then add 15 mm to that then find a tyre (hopefully still a 245/75) that suits and fits within that spec.

The other argument you could try is that - "since you can buy a 245/70 at 754 mm (or whatever you find) and a 245/75 at 756 mm (or whatever sammlest one you can find is), then because a 245/75 is less than 15 mm bigger than a 245/70, does that mean you can fit any 245/75?"

That was going to be my next line of enquiry if the first one had failed.

Good luck.
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FollowupID: 323335

Reply By: Davoh - Friday, Jun 04, 2004 at 17:57

Friday, Jun 04, 2004 at 17:57
Hi Truckster, Rohan, Mrs Diamond, Carefree, Moggs et al. I am new to this so please bear with me. I have been reading your conversations about tyres and am very interested because I am also considering tyre replacement on my NM Pajero Exceed. I have become very interested in the Cooper ST-C 265/75x216 and my query is, what about speed ratings? I understand the issues about increase in diameter (rolling radius) etc, but my research indicates that the Cooper amongst others of the LT tyres, only have a speed rating of N. This is somewhat less than the S rating specified on the Pajero and I assume a number of other vehicles. Does this mean they are not legal or what. What do you all think???
PS I am planning a tourism business in 4WD Tours of Tasmania's Southern forests and expect to do quite a bit of gravel/offroad driving. I am finding this size & speed rating is an issue with a lot of highly recommended tyres, esp. in the M/Ts....
AnswerID: 61722

Follow Up By: Member - Moggs - Friday, Jun 04, 2004 at 19:11

Friday, Jun 04, 2004 at 19:11
My Coopers are rated to 140km/hr (N). I believe this is the bare minimum that is legal for the vehicle according to the RTA. Doesn't really concern me though - never will wind it up to 140km/hr.
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FollowupID: 323188

Follow Up By: Member - Rohan K - Friday, Jun 04, 2004 at 19:35

Friday, Jun 04, 2004 at 19:35
Davo, this is where the states start to differ. In NSW you can fit any tyre with a min rating of 140 kph. Other states (but I don't all the different regs) require you to fit a tyre with a minimum speed rating equal to the minimum speed rated tyre shown on your vehicle's tyre placard.
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FollowupID: 323192

Follow Up By: Carefree - Friday, Jun 04, 2004 at 21:49

Friday, Jun 04, 2004 at 21:49
Firstly, thank you all for your contributions re my tyre profile question.
It was particulary interesting to hear from someone who has done it. I must admit my tyre dealer and I had already agreed we would do the spare first to see if it would fit.
Secondly, as a result of your contributions I have decided to stick to the 70 profile. Heading off to the Cape on the 19th and don't have enough spare time between now and then to do any follow-up research.
Thirdly, you may be interested to hear that I'm still running the OEM tyres (new Jan 2002). They have done 50,000kms been to Broome & back via Buchanan Hwy & GRR plus. Only ever lost one tyre with a metal stake on the Bylong/Rylstone Rd (NSW).
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FollowupID: 323206

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