265x75x16 tyres on Hilux

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Re: 265x75x16 tyres on Hilux

Postby HK1837 on Tue, 10 Oct 2017 6:17 +0000

Oaks76 wrote:Hi Guys,

After a few hours of trawling through this forum i can't seem find a definitive answer to my query regarding rim offset.
I have a 2011 SR Duel Cab trayback that I've just put a 2" OME lift under. I've decided on a set of 265x75x16 KO2's on 16x7 Sunraysia rims. As I don't have flares, I was wondering if I go with a +20 offset will the tyres be within the wheel arch or do I need to go with a +30 offset so they don't stick outside the guards?

Cheers, Oaks.


Is is an upgrade 2011 with bigger brakes or the 2005-2011 brakes? You will end up with cooked rotors with tyres that big on the early brakes. I fried my 2011 front rotors twice with 265/65/17 tyres upgraded from the original smaller 255/70/15, and 265/75/16 are 3.5% bigger again. Also be careful of Insurance if yours only had the 205R16 tyres, those 265/75/16 tyres plus your 50mm lift put you over the legal limit of 75mm max lift (50mm suspension plus 25mm tyres). The 265/75/16 are 66mm (33mm lift) taller than the SR5’s 255/70/15 which are pretty much the same size as 205R16.
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Re: 265x75x16 tyres on Hilux

Postby Oaks76 on Tue, 10 Oct 2017 7:46 +0000

Its the 2005-2011 SR, so must be the smaller brakes. Thanks for the info mate, you've given me something else to think on.. Although reading through these forums I've not heard of anyone else running this size tyre having cookod their rotors. Maybe there's a different thread i can look into?
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Re: 265x75x16 tyres on Hilux

Postby HK1837 on Wed, 11 Oct 2017 7:36 +0000

The pre-stability control cars had smaller brakes and also a load-sensing valve on the rear circuit. So you have two issues:

1. If you go up in tyre size you have to go up in rotor diameter by a similar percentage to achieve the same braking torque. This is one major reason why when the SR5 went from 255/70/15 to 265/65/17 the rotor diameter increased from 297mm to 319mm. This is a 7-ish % increase in rotor and a 5.2% increase in tyre diameter. The 265/75/16 is 9% bigger than 255/70/15.

2. These also had the load sensing valve that increased rear braking when loaded. When your front suspension sags (which these are notorious for especially after fitting bar and winch) it provides less rear braking as the load sensing valve thinks the rear is higher.

The beauty with these though is you can fit TRD front rotors which are 338mm diameter (14% rotor diameter increase), all you need is the rotors (120 series or TRD Hilux), 120 series calipers (or TRD Hilux calipers) and the backing plates. I think you can use 150 series rotors and calipers too, they are the same diameter just 4mm thicker, but you'd need 150 series calipers too. Then buy some original Hilux or Prado 120 17x7.5" rims or aftermarket Speedy copies and fit either 265/65/17 tyres or if you want bigger go 265/70/17. 265/70/17 are pretty much the same size as 265/75/16 but remember that these are still 65mm diameter bigger than your originals and with a 50mm lift you are restricted legally to 50mm maximum increase (25mm lift) in tyres. 265/65/17 are 38mm (19mm lift) over the originals. At least with the TRD brakes you are accounting for the bigger tyres if you choose to go that way, the TRD combination was the 338mm brakes with 17x7.5 rims and 265/65/17 tyres. If you stuck with the legal tyres (265/65/17) you could also fit the 2012 update 319mm rotors and calipers and also have brakes equivalent to what the manufacturer intended. I don't see the point in that though for a pre-2012, just copy what the TRD had.

I cooked my original rotors by 30,000kM, mainly towing but with the 265/65/17 tyres. I replaced them with T3 rotors and Bendix pads but they suffered too. So I bit the bullet and upgraded to the TRD size 338mm rotors. Problem solved!
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Re: 265x75x16 tyres on Hilux

Postby Oaks76 on Thu, 19 Oct 2017 4:47 +0000

Looks like I might have to keep my eyes peeled for a TRD brake set up. How you've explained it makes perfect sense, thanks for the help.
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Re: 265x75x16 tyres on Hilux

Postby HK1837 on Thu, 19 Oct 2017 5:32 +0000

All the TRD used was 120 Series calipers, rotors and backing plates. These are easy to find. New calipers are easiest (heaps on EBay), or buy some kits and rebuild a set of used ones (which I did as i’d rather genuine Japanese than Chinese aftermarket). The hardest part is knocking the driveshafts out of the centre of the hubs so that you can undo the 4 bolts holding the hubs on and replace the backing plates. Mine came out easy with a 25mm brass drift, but the 120 Prados I attacked to get the donor backing plates from were a pain, took ages to get them to release. 120 calipers bolt straight on and hook up to the metal brake lines on the Hilux. Make sure you spend some time with some emery paper cleaning up the hub faces so the new rotors fit square on the hub. You can buy new rotors cheap as chips too, I bought Aussie made T3 which are $200-ish each.
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Re: 265x75x16 tyres on Hilux

Postby Oaks76 on Sun, 22 Oct 2017 8:19 +0000

Thanks mate, I'll check out eBay.
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Re: 265x75x16 tyres on Hilux

Postby HK1837 on Mon, 23 Oct 2017 3:57 +0000

Remember you normally need 17” rims with the Prado brakes. 16” steel might fit but never tried.
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Re: 265x75x16 tyres on Hilux

Postby wombat81 on Sat, 28 Oct 2017 12:01 +0000

Gday all. I figured I was better off posting here rather than creating a new thread. There's so much info, opinion, law and grey area out there on tyre/rim sizes my head is mush.

My 2010 SR 4x4 dual cab/chassis currently has OEM 16" steel rims all round with 225/75/r16 tyres. I'd like to go a bit bigger. My tyre placard says the original tyres were 205/16C size. So that means that going to 265/75/R16 tyres would be illegal in QLD (maximum of 50mm diameter increase from the tyre placard), I believe.

So I'm looking at 275/70/R16 or 265/70/R16 sizes instead since I *think* they are just within legal. So I have a few questions.

1. I have a 40-50mm lift. Is scrubbing likely to be an issue with these size tyres?
2. What size/offset ROH Trak rims would be the best choice? From the reading I've done, 7" or 8" wide rimes would be suitable? is that correct? What are the pros and cons of 7" vs 8"? What size Traks are 265/75 owners running?
3. Would I need flares to keep it legal? I'd rather not fit flares, but I will if I have to.

Thanks in advance.
Current: 2021 SR Dual Cab Chassis 4x4 2.8TD Manual
Retired: 2010 SR Dual Cab Chassis 4x4 3.0TD Manual
My current (2021 model) build thread
My previous (2010 model) build thread
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Re: 265x75x16 tyres on Hilux

Postby Luxy89 on Tue, 28 Nov 2017 2:15 +0000

Hey lads anyone know if i put front sr5 flares on my 2013 sr with 265/75/16 and 0 offset will the flares be wide enough or will the tyre still sit outside the flare ?
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Re: 265x75x16 tyres on Hilux

Postby HK1837 on Tue, 28 Nov 2017 3:40 +0000

I'd say they will be close to being outside the flares. The Speedy rims in the following link are +30 on 17x7.5 which is identical offset and size to the original 2012 onwards SR5 rims, these run 265/65/17 which is essentially the same as 265/70/16. If you are using 265/75/16 they will be essentially the same width as either of these and you are pushing them out further by 30mm. So look at any 2012-2015 SR5 (2011 if diesel) with factory wheels and tyres and measure another 30mm out with a ruler. I reckon they'll probably scrape too.

http://speedywheels.com.au/product/gran ... tin-black/
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Re: 265x75x16 tyres on Hilux

Postby kevinreid89 on Wed, 13 Dec 2017 10:36 +0000

Hey guys does anyone know if the tread of the 265/75r16 on 7" 30+ offset rim will stay inside SR guards, I relise the tyre wall will be hanging out just would like to know about the tread?
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Re: 265x75x16 tyres on Hilux

Postby HK1837 on Thu, 14 Dec 2017 5:15 +0000

I saw a 2012 SR a while back with +30 17” rims (120 Series Grande rims) and 265/65/17 and they were outside the front guards by maybe 5-10mm. I reckon the next tyre size up (265/70/17 or 265/75/16) might go close to hitting the back on full lock too. Unless yours is 2012 up those tyres will make your front rotors suffer too.
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Re: 265x75x16 tyres on Hilux

Postby TOYZX on Thu, 14 Dec 2017 12:19 +0000

Also ya trye will more than likely be touching the ucas.

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Re: 265x75x16 tyres on Hilux

Postby Jackmack01 on Sat, 08 Dec 2018 3:05 +0000

Does anyone know what offset would be needed for 265/75r16 ( roughly 31.5x10.5 ) to not stick without flares?
Thanks, Jack
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Re: 265x75x16 tyres on Hilux

Postby nicebike on Sun, 09 Dec 2018 5:53 +0000

Jackmack01 wrote:Does anyone know what offset would be needed for 265/75r16 ( roughly 31.5x10.5 ) to not stick without flares?
Thanks, Jack


Search for "Fitting 32" Tyres" thread. Heaps of info there.

Either way you won't get 265/75/16 under the guards and clear the UCAs without flares.
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Re: 265x75x16 tyres on Hilux

Postby Cameron12 on Tue, 11 Dec 2018 3:04 +0000

I have 265/75r16 on a 16x8 and 0 offset, this is perfect WITH flares.
So you'd have to go for a positive offset to keep them inside, then you're going to have way more issues with scrubbing and wheell alignments.
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