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Old 04-05-2012, 11:10 AM   #1
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Exclamation 15 or 16 inch rims?

hi guys, so im stuck between using a 15 or 16inch rim, naturally cost will factor into my judgement, but right now my biggest concern is how far the tire sticks past the flare, reason being up here in manitoba, Canada there is a law which states you cannot have your tread pass the flare in terms of width, but you can have the sidewall stick out, anyways if i get a 15 inch rim how far will it stick out? especially if im looking to get a 33x12.5 with a max back spacing of 4-4.5...i personally dont care if the tread sticks out a tiny bit, doubt they will bring out the ruler :P, anyways can people with 15 inch rims and people with 16 inch rims with 33x12.5 tires post pics of how far your tires stick out, im curious to know if i have to go to a 16 rim just to clear the calipers and stay within "legal limites" Thanks guys

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Old 04-05-2012, 11:17 AM   #2
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15s are cheaper, lighter, and the tires for them are cheaper and lighter in almost every circumstance over 16s. The black rocks have a backspacing a little less than most 15x8 standards with 3.75. MTH (forum member on here) has them and when paired side by side to my 15s his were slightly taller and a little less wide. It looks like the law there is going to be the biggest factor in your decision.

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Old 04-05-2012, 11:17 AM   #3
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I don't have 15" or 16" but you will need to specify the with of the rim you are looking at as well. I think most people at the size run 8" width but there are other sizes available.
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Old 04-05-2012, 11:19 AM   #4
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Any 15" wheel is going to force the tread outside of the fender. This is due to the shallow backspace that 15" wheels need in order to clear the calipers. Here is a pic of MTH's rig with 15x8 Black Rock 909s which have 4" backspacing. Tires are 33x12.5 Duratracs. This is about the largest backspace you are going to find in a 15" wheel that will fit the JK. As you can see, the tread is definitely out past the fender.


Now, here is a shot of my 16x8.5 Level 8 Strike 5s which have 4.5" backspacing. Tires are 285/75/16 Falken Rocky Mountains (33x11). Even these cause the tread to be out past the fender just a bit, but definitely in further than Mike's above. This is due to the shallower backspace as well as the skinnier tire.
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Old 04-05-2012, 11:19 AM   #5
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Regarding fitment of 15s on your JK, there are an enormous amount of 15x8 alloy wheels that fit over the calipers safely and do not require any modifications.
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Old 04-05-2012, 11:21 AM   #6
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33x12.5 on 15x8 with 3.75 of backspacing

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Old 04-05-2012, 11:24 AM   #7
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I've got 16" rims with pro comp A/T 33's. keep in mind these are with flat fender flares...with stock flares they probably won't stick out at all. hope this helps...

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Old 04-05-2012, 11:37 AM   #8
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so i made a few phone calls and found out they are pretty strict on tread sticking out, even a little has resulted in 450$ fines for jeepers, and its killing the jeep scene out here, im pretty bummed, because this means i will probably have to get 17's or larger flares, either way this wont be cheap. my next question, does a 17x8 work or 17x10? and what are the rec. backspacing numbers?
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Old 04-05-2012, 11:47 AM   #9
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Quote:
Originally Posted by Lagzalot View Post
so i made a few phone calls and found out they are pretty strict on tread sticking out, even a little has resulted in 450$ fines for jeepers, and its killing the jeep scene out here, im pretty bummed, because this means i will probably have to get 17's or larger flares, either way this wont be cheap. my next question, does a 17x8 work or 17x10? and what are the rec. backspacing numbers?
17x8 would be fine. Of course, going with a 17" wheel/tire is going to cause the price to take a nice jump

Ideal backspacing to run a 12.5" wide tire on a 8" wide wheel would be 4.5" (which is same as 0 offset on the 8" wheel), but as you can see from my post above, this will cause even a 285 tire to stick out past the flares on my 8.5" wheels, let alone a 12.5" tire (315). From the sound of it, you need to try to stick with something in the 5" backspacing range and a 285 tire. This should keep all of the tread under the fender. Most of the 16x8.5 wheel options out there are either -6 offset (4.5" backspacing) or 18 offset (5.5" backspacing). Not sure I would recommend a backspacing that large as it would be pushing it for a 285 tire, though some washers on the steering stops may help to prevent and rubbing you might get.

As an alternative, you could find some 17" takeoffs and run pizza cutters (255/80/17 BFG KM2s). These are tall & skinny tires, 33x10. They are the same width as the stock 17" tires, but are an inch taller. This is what they look like in a stock height Rubi on stock wheels (6.25" backspacing).

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Old 04-05-2012, 11:56 AM   #10
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Not sure I would recommend a backspacing that large as it would be pushing it for a 285 tire, though some washers on the steering stops may help to prevent and rubbing you might get.

DTD (Matt) confirmed +18 offset on a 16x8.5 fitted with 285's will be fine without rubbing. And will be under the fender. We have the same laws up here (about fender coverage).

Quote:

Thank you for the PM Phil.

You are correct, the 16x8.5 +18 TKO will work on your JK with 285/75-16 tires without any rubbing.

Right now the AT2 is on back order but we do have the BFG A/T KO in stock. Another good option to look into that also carries the mountain snowflake symbol is the Goodyear Wrangler DuraTrac.

Give us a call at 1.888.459.4080 when you're ready to get the ball rolling and anyone of our sales agents would be happy to assist you with this purchase.

Thank you for your support here on the boards.

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If you want something with a lower BS, ultra wheel has a few 16x8 rims @ 4.9" BS.


DB
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Old 04-05-2012, 12:05 PM   #11
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I know you are worried about cost but there is another alternative but it isn't really cheap. It is the HighRock 4X4™ Fender Flares. These flares are 2.5" wider than the standard OE flare. This application fits directly over the existing OEM factory flares but they are $549.99. But once you have it on you can go to whatever wheel/tire combo you want and still have the tire tread under the flare. Don't know much about them other then what they advertise.


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Old 04-05-2012, 12:23 PM   #12
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Quote:
Originally Posted by Dick Blonov View Post
DTD (Matt) confirmed +18 offset on a 16x8.5 fitted with 285's will be fine without rubbing. And will be under the fender. We have the same laws up here (about fender coverage).



If you want something with a lower BS, ultra wheel has a few 16x8 rims @ 4.9" BS.


DB
16x8 with 285s (33inch?),4.9 bs minimum 2 inch lift?
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Old 04-05-2012, 12:48 PM   #13
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ok guys, so i think i figured out what tire size i want, which is 285/75r16...which is roughly a 33inch diameter and 11.5 inch width, I want a wheel that will get the tread as close to the flare as possible without going over, any ideas on what backspacing i will need? somone said 4.9 does that apply with a 11.5 width tire?
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Old 04-05-2012, 12:56 PM   #14
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Quote:
Originally Posted by Lagzalot View Post
so i made a few phone calls and found out they are pretty strict on tread sticking out, even a little has resulted in 450$ fines for jeepers, and its killing the jeep scene out here, im pretty bummed, because this means i will probably have to get 17's or larger flares, either way this wont be cheap. my next question, does a 17x8 work or 17x10? and what are the rec. backspacing numbers?
I'd go with the smaller wheels and get wide flares to cover them. There's a lot of flare options out there.. so go find one that works for you and go that route. Then you can have your big tires and wheel them too!
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Old 04-07-2012, 11:15 AM   #15
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anyone know if this rim would work on a 285-75-16 tire? 16x8 wheel
Here are the specs
http://www.ultrawheel.com/pdf/rims/1...0Cut%20RWD.pdf

would the tire rub? stick out past fender? thanks
heres the rim
http://www.ultrawheel.com/wheel_deta...brand=1&id=392

where i live there arent any rocks to climb really, mostly mud trails and pits, so not worried about scratching
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Old 04-07-2012, 01:39 PM   #16
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Sorry for the quick hijack, just needed to ask a quick question

Is there any wear or tear on the Jeep with 33x12.5x15?? ive been told its hard on the ball joints and axle, not sure what they mean......

My jeep will not be a huge off-roader will be more a DD/WW. out of the 1-10 scale rating on trails, ill never be more then a 5...( for now) lol.

The jeep is going to be a JKUR so it will be beefed up axles and shocks.

Now living in Canada, Alberta is jeep/truck country, but i dont need the chance on getting $450 fines. So now im looking at
16 inch rims MB TKO's with either 285/75R16 Dura's or
305/70R16, to help limit the tread sticking out.

I guess what im looking for is info on the 15 or 16 inch rims with the wide tires, is there anything that can harm the jeep over time, while not pushing the jeep to the limits.

Any info/help on this would be awesome. Hope what i asked makes sense.
LT285/75R16
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Old 04-10-2012, 01:19 AM   #17
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it's official, i bought 16x8.5 tkos on 285/7516 duratracs, i'll post pics when i get them and details as to their fit, thanks for the help guys!!
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Old 09-20-2012, 06:58 AM   #18
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Wheels and the under flare tuck-in

Any stance pics of your 285/7516 duratracs?

Caught with the same 'legalities' where I live also.

This would be very appreciated.

Woodridge

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