Tyre & rim questions

Submitted: Thursday, Jul 31, 2003 at 19:55
ThreadID: 6280 Views:2194 Replies:4 FollowUps:3
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i have just purchased a hilux 3.0 Lt turbo diesel. it came with road tyres on alloy rims. i am planning to do a fair bit of off road in the future and was after info on wether it would be a good idea to purchase a new set of rims with a more durable tyre for off road and interchange them for highway work. i need to know if this would be practical. i like the tyres that are on them at the moment as they are great on the road ( bridgestones 255/70r15 112L LT) and i do alot of road driving for work. Should i get bigger rims and tyres for off road? i have sort of settled on ta set of coopers (advice from a couple of friends) tyres that are 80% off 20% on but i dont want these on while travelling long distance on highways any help on this topic would be much appreciated.. CHEERS!!!
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Reply By: bluehealer - Friday, Aug 01, 2003 at 20:14

Friday, Aug 01, 2003 at 20:14
i am asking the same questions too ,approached my insurer the other day ,racv,was told if i put anything on with less than the load index of 112 my insurance would become void or useless,asked tyre dealers and they laughed you cannot buy any offroad tyres with 112 index ,any advice off the forum would be helpful thanks
AnswerID: 26573

Follow Up By: Jimbo (WA) - Saturday, Aug 30, 2003 at 19:31

Saturday, Aug 30, 2003 at 19:31

I have the same vehicle and have just gone through the same dramas. Check out this topic at overlander forumand you will see what I have found out.

To keep it simple, you don't have to match the load rating of the tyre that is factory fitted - but you MUST match the load rating on your tyre placard. For an SR5 Hilux the placard says that you need to meet a rating better than the heaviset axle, and that means you need a rating of 100 or better - NOT 112.

Cheers, Jim

"Lead, Follow.....or get out of the way!!"
FollowupID: 20775

Reply By: diamond (bendigo) - Friday, Aug 01, 2003 at 21:12

Friday, Aug 01, 2003 at 21:12
gday bulldog.
why not fit 225/75/16 cooper a/t 115 load index on some 6" split rimsnew job coming so no fraser this time:-((
AnswerID: 26582

Reply By: Member - Leigh- Friday, Aug 01, 2003 at 21:48

Friday, Aug 01, 2003 at 21:48
Hi Bulldog. Same issue faced with same vehicle. For what it is worth I was able to swap tyres for Bridgestone AT's (691) of same load index. Whislt Coopers would be my choice for desert trips I find the AT Bridgestones are a reasonable all round compromise and particularly good on highway. Prado rims (16') are also an option if you want to have 2 sets but check with your insurance co as all they need is an excuse in a worst case scenario. Good luck!
AnswerID: 26587

Reply By: Member - Raymond - Thursday, Aug 28, 2003 at 12:35

Thursday, Aug 28, 2003 at 12:35
G'day Bulldog,
I've just bought myself the same vehicle and ended up trading the original tyres in for a set of BFgoodrich AT 235/75/15 with sunraysia rims. These were recommended to me by the tyre store and the changeover price was $700 for 5 new tyres and 4 new rims. I was informed by the RTA Canberra that if the new tyre had a rolling circumference more than 15mm of the factory tyre, it would be illegal.
I have had the BFgoodrich AT's before on my other 4WD and thought they were great all round.
AnswerID: 29438

Follow Up By: Member - Rohan K - Thursday, Aug 28, 2003 at 15:12

Thursday, Aug 28, 2003 at 15:12
Raymond, that's correct. However, I've been onto the NSW RTA on this issue because of the mass confusion that surrounds it, especially as there is such a large variation in actual tyre diameter, within the same tyre size. The short story is that because my tyre placard only states a 245/70/16, I can only fit a tyre with 15 mm larger. If you use any one of the tyre calculators available, they will indicate I could only fit a 255/70/16 as any other size exceeds the 15 mm limit. However, this is not the case, in reality. Because I found a 245/70/16 tyre that has a diameter of 805 mm, I am able to fit any tyre (so long as I stay within the width, speed and load limits) up to a maximum of 820 mm in diameter. That means I can even fit a 265/75/16 tyre (804 mm). This has been confirmed to be by the RTA via e-mail.

For more info/discussion on the issue go to
overlanderand search in the technical section for "tyre sizes".Smile, you're on ExplorOz
Rohan (Sydney - on the QLD side of the Harbour Bridge)
FollowupID: 20550

Follow Up By: Member - Raymond - Thursday, Aug 28, 2003 at 15:19

Thursday, Aug 28, 2003 at 15:19
I realise that you can get an R16 tyre for the Hilux. I was just saying that on the changeover, I went to a R15 tyre. I did so because previously I ran 31/10.5/15 of which I had a spare which I traded in as part of the deal. Originally, I was going to fit the 31" but was informed by a variety of tyre stores that they would no longer be legal. I settled on the 235/75/15 for simplicity's sake and because it meant that I only had to purchase 4 rims and not 5.
FollowupID: 20551

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