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-   -   265/70R16 vs 245/75R16 (http://www.risingsun4x4club.org/forum2/showthread.php?t=20619)

DaveInDenver 12-16-2013 05:35 PM

265/70R16 vs 245/75R16
 
Has anyone gone from a 265/70R16 to the narrower 245/75R16 (height is very close to the same just about an inch narrower)? In this case on a first gen Tacoma. Wondering if the narrower width helps with mileage and maybe a bit better on snow. I know, it's crazy to go with smaller tires, but there are rub marks on the frame in the stock configuration so I think the OE 265/70 might be too wide anyway and I would be going with one of the typical mildly aggressive ATs, BFG A/T, Yokohama Geolander, Goodyear Duratrac, etc. so it would be potentially worse.

MountainGoat 12-16-2013 09:06 PM

I run taller and narrower than stock tires on my 2000 4Runners - 235/85R16. One set of Duratracs and one set of BFG ATs. There is no significant change in gas mileage corrected for the diameter. Actually both runners speedometers are spot on with this configuration.

They steer lighter due to the narrow contact area and they do really well on the snow and ice. My perception is that they bite better and tend to plow less, particularly in deep wet snow and slush. They don't rub either. :D

DaveInDenver 12-16-2013 09:20 PM

Are you running them on the stock rims? I believe our Taco has OEM 7" rims so I was thinking I wouldn't want to go full on pizza cutter necessarily and leave the rim exposed to rocks. The 235/85R16 is 9.25" wide.

Rzeppa 12-16-2013 11:35 PM

On a 40. stock rims are 7" and 235s work just fine on them. Personally I prefer narrower tyres.

DaveInDenver 12-17-2013 05:35 AM

I agree about narrower tires. According to both BFG and Goodyear 235/85R16 has a rim range of 6" to 7". The 245/75R16 is 6.5" to 8" and the 265/70R16 7" to 8.5". Obviously the 7" rim works for all of them and kind of looks like the sweet spot is 245/75R15 anyway.

I'm running stock suspension that doesn't have much clearance, I wonder if the 235/85R16 will be too tall to fit. As it is the 265/70R16 is pretty close. It's a chicken and the egg problem, I want to put suspension on but if I have to buy tires that will be postponed for some time. I'm leaning towards the 245/75R16 I think, although most of the options are going to be load range E, the Duratrac comes in a load range C that might work. I'd prefer D, but whatcha gonna do?

MountainGoat 12-17-2013 05:41 AM

Quote:

Originally Posted by DaveInDenver (Post 243588)
Are you running them on the stock rims? I believe our Taco has OEM 7" rims so I was thinking I wouldn't want to go full on pizza cutter necessarily and leave the rim exposed to rocks. The 235/85R16 is 9.25" wide.

They are both on stock alloys, 16x7. I have had no problem with rocks on the rims. This is really my ideal setup, it works great for wheeling as well as on the street. Plus they look perfect to me.

Here is a picture with the Duratracs:

http://chrissandstormfj.smugmug.com/...DSCF7723-L.jpg

This truck has over 300k on the original suspension, so the old girl is a little soft and saggy. :hill:

L43dean 12-17-2013 10:29 PM

I Like Enchiladas and Tires in Red Dirt.
 
Hello Dave, I have seen Dan's green 4Runner with stock 7" wheels and 235/85R16 A/T's. It did look right on the rim and on the rig. Non US 70 series are still shod with 7.5 x 16's. It has been my experience that a narrower footprint slips less on loose rock and snow or ice. Especially when running open diff's. I say go with the 75 or 85 aspect ratio. Amongst 235/85 and 245/75 what is the diameter difference? I understand this will vary depending on tire make/model. That might help me make up my mind on a fully loaded Tacoma with Nest, bikes and ales. Now, how wide to cut the rubber TEQ mudflaps? Cheers! Dean

DaveInDenver 12-18-2013 05:27 AM

Very rough approximate conversions. I know you Dean (like I) are a lot more familiar with good ol' standard dimensions on 15" rims...

265/70R16 = 31 x 10.5 (tread width ~8.5")
245/75R16 = 31 x 9.5 (tread width ~7.5")
235/85R16 = 32 x 9.25 (tread width ~7.75")

And our 20/22R, G52/W56, 4.10 favorite (which is just about as uncommon in 16" as 15" unfortunately):

235/75R16 = 30 x 9.5

I hopefully won't have to do anything until next month. Discount went ahead and rotated and balanced my current tires but the tread depth is between 4/32" and 5/32" on all four, so we're talking a matter of a few thousand miles.


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