Tyre Sizes

Submitted: Monday, Mar 21, 2005 at 13:40
ThreadID: 21401 Views:2765 Replies:4 FollowUps:0
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Hi All

The time is fast approaching when I need to part with large amounts of my hard-earned for tyres. I'm not trying to start a brand discussion as I'm staying with BFG AT's.

When I called around the dealers I was asking for a price on 275/70x16 which is what I'm running now, one guy asked "what's wrong with 265/75x16? They're $44 cheaper each!" That started me thinking....dangerous, I know!

I've checked the tyre size calculator and there's mimimal difference in the rolling diameter. So, what's the difference? The tyre guy seemed to think that there'd be no discernable difference. I'm mainly towing the Jayco when away so the 4WDing isn't exactly rock-hopping.

Has anyone had any experience in this area?
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Reply By: MrBitchi - Monday, Mar 21, 2005 at 15:02

Monday, Mar 21, 2005 at 15:02
Me thinks the 265/75/16s would be better as they're more common in the bush.

Cheers, John.
AnswerID: 103305

Reply By: pmacks - Monday, Mar 21, 2005 at 17:12

Monday, Mar 21, 2005 at 17:12
G Day,
I run 265/75 x 16 on the nissan and the main reason i changed to this size was price and availability. simple as that heaps cheaper and more variety
AnswerID: 103328

Reply By: pjchris - Monday, Mar 21, 2005 at 22:21

Monday, Mar 21, 2005 at 22:21
Depending on the vehicle they may be illegal. On my Paj (265/70/16 standard) 275/70/16 is legal while 265/75/16 is not (More than 15mm larger than largest size fitted to vehicle).


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AnswerID: 103381

Reply By: BenSpoon - Tuesday, Mar 22, 2005 at 16:30

Tuesday, Mar 22, 2005 at 16:30
This threw me off too whilst looking at the tyres, especially when I asked a few tyre shops about the Numbers- I just assumed the first number was the height of the tyre (eg: 285s=33", 315s=35"), which it is not.

The width difference may be a benefit to you. I ruled it as a marginal difference, so I wasnt too willing to go the extra $75 per tyre. In regards to the rolling diameter and speedo- it puts that out a percentage or two- Either way not significant considering the speedo in 80s reads too fast anyway, and if you've got a GPS to match it against, you're set.

The slightly taller tyre will give you about 6mm of extra diff clearance. Bugger all really when you are pulling a low-slung mobile house behind you.

With a significantly bigger diameter, power, speed and braking are all affected, but at a 12mm increase- I'd be surprised if you even notice it.

AnswerID: 103447

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