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Old 05-01-2017, 09:27 PM #1
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Mount Chop Mod Necessary?

Hey Guys just read up on the Mount Chop Mod and I wanted to make sure it was absolutely necessary to do if going to an aftermarket wheel and bigger tires.

I'm just waiting for the SCS SR8's to be back in stock and will be ordering the 17x8.5 and am going with Toyo Open Country AT2 275/70/17.

Are there better tires to look into that would let me avoid the Mount Chop Mod?

Thanks!
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Old 05-01-2017, 09:40 PM #2
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Quote:
Originally Posted by eRock_runner View Post
Hey Guys just read up on the Mount Chop Mod and I wanted to make sure it was absolutely necessary to do if going to an aftermarket wheel and bigger tires.

I'm just waiting for the SCS SR8's to be back in stock and will be ordering the 17x8.5 and am going with Toyo Open Country AT2 275/70/17.

Are there better tires to look into that would let me avoid the Mount Chop Mod?

Thanks!
Not to burst your bubble, but Toyo doesn't offer that tire in that size. Their website lists 265 and 285, but no 275. I would be running that tire, in that size, if it was offered.

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Old 05-01-2017, 09:42 PM #3
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Quote:
Originally Posted by Ohio Hawk View Post
Not to burst your bubble, but Toyo doesn't offer that tire in that size. Their website lists 265 and 285, but no 275. I would be running that tire, in that size, if it was offered.

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I guess I'm going 285...LOL.
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Old 05-01-2017, 09:55 PM #4
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MOST 285s will rub the body mount. Only way to not rub.... Stock sized tires.

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Old 05-01-2017, 10:14 PM #5
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Every option might yield different results. If you are running 285s you can try adjusting your caster and trim the hell out of your bumper . If you run spacers you will need a bmc. Sometimes you just have to roll up your sleeves and get dirty.
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Old 05-01-2017, 10:27 PM #6
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Honestly... Just do the body mount chop and don't look back! Then you will have no rub, wheel/tire upgrade will be done, and you can worry about what you wanna do next to your T4R!

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Old 05-01-2017, 11:09 PM #7
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Alot depends on rim backspace and how much further it pushes the out. Stock suspension and wheels on my trail i rode KOs for 60mi with no rub in the back Of the tire at all with mudflaps, just pushed the front liner forward.

Added 5100s at top ring and 1/4" spacer and spc ucas, no rub, added cooper muds, no rub.

Changed rim to pro comp verigos 17x9 -6bs and rub. Remove mud flaps, readjust fron fender, no rub.

Everyone will have a slightly different experiance, Id just do what your planning and adjust after IF needed
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Old 05-01-2017, 11:09 PM #8
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Get everything put on. Get alignment. And then see what is necessary. I wouldn't do a bmc unless it was needed.
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Old 05-02-2017, 12:25 AM #9
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Should definitely not need a body mount chop with 285s and proper alignment. It does depend on wheel width and backspacing. 9" wheels or wheel spacers often require it. 8.5" is cutting it close, but it should be fine with the right alignment.

It would be really stupid to hack the body mount if it was not required. I've seen some really bad ones and not many people spend the time to do it right. And it will technically never be as strong as stock once you hack it. Also. many people do it not understanding alignments....
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Old 05-02-2017, 12:30 AM #10
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Quote:
Originally Posted by 4RnR Grl View Post
MOST 285s will rub the body mount. Only way to not rub.... Stock sized tires.

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Sorry, but not correct. Plenty of ways to not rub and 285s can easily clear the body mount. Anything but stock.. will typically rub plastics, but that is super easy to resolve. The body mount is a major undertaking that I would not recommend for the avg user. It can't be reversed and has potential safety impacts. Not enough to really worry about, but horrible to hack up a truck when its not necessary.
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Old 05-02-2017, 02:05 AM #11
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Every case will be different, but for what it's worth, I will share my experience. I went with Nitto Ridge Grappler 285/70s on FN Overlander wheels (8.5'' with -6 offset) and have a tiny tad of light between tires and the body mount on full lock. I found that offset is a crucial variable. Had I gone with more aggressive offset (-10 for instance), I could have had the tires rubbing the body mount. All else equal, wider rims are more likely to rub the body mount as well. Finally, going with M/T tires could put you on the other side (they are like ~0.2" taller). I was lucky.


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Old 05-02-2017, 08:15 AM #12
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Quote:
Originally Posted by 304tmt View Post
Get everything put on. Get alignment. And then see what is necessary. I wouldn't do a bmc unless it was needed.
This^^^.

Get your wheels and tires installed and see how they fit first. I run 17x8" wheels with 4.5" backspacing, Nitto Ridge Grapplers 285/70/17 and I clear the body mount with the wheels stuffed by about 1/8". It's a little closer than I would like it but we've taken it to Moab and in mountains around here and it doesn't rub. My alignment is adjusted for maximum caster, which helps push the wheels forward and clears the body mount. You may have to trim the front bumper a little as well as push the fender liners forward. I didn't run into that issue as I have a Pelfreybilt bumper.
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Old 05-02-2017, 09:37 AM #13
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Quote:
Originally Posted by eRock_runner View Post
Hey Guys just read up on the Mount Chop Mod and I wanted to make sure it was absolutely necessary to do if going to an aftermarket wheel and bigger tires.

I'm just waiting for the SCS SR8's to be back in stock and will be ordering the 17x8.5 and am going with Toyo Open Country AT2 275/70/17.

Are there better tires to look into that would let me avoid the Mount Chop Mod?

Thanks!
I am running 285 Toyo Open Country R/T's with stock suspension and stock trail wheels - no body mount rub. Anything that will push the tire outward (different wheel offset, spacers, etc.) will get me in trouble with the body mount.
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Old 05-02-2017, 11:05 AM #14
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285s on mine. Caster is set to max with aftermarket control arms... I only rub in full lock reverse. To me not worth the BMC ill just act like I dont know what im doing and perform a multi point turn when not necessary
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Old 05-02-2017, 11:22 AM #15
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Honestly guys -> 265s will go anywhere that 285s will go - - -

No need for lifts, no need for re-gearing, cv joints and boots will last forever, stock shocks will last forever, suspension alignment can actually be left stock, stock wheels actually look pretty nice. And the urban guys in Reno aren't looking to steal my truck........
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