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post #1 of 8 (permalink) Old 09-27-2017, 01:35 PM Thread Starter
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Question Setup-Specific Offset questions

Looked around and saw a few posts here and there about what offset is required for a 35x12.5, but they were all on different level of lifts than my truck. So my truck has the TRD off road package and then a 3/1 level/lift. What kind of offset should I go with if I want to run 35s? I know the stop wheel offset is around +60mm, and I've heard that +35 is where I should aim for. But I really want to ask around and make sure before I do any purchasing, not to mention its pretty hard to find +35mm offset wheels in general. I also am not doing a body mount chop, and I already know about the trimming required, so I just figured I should let any reader know that. Another thing is wheel width. With a 12.5 inch wide tire, what width of wheel should I be at? Any and all help is much appreciated, so thanks in advance.
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post #2 of 8 (permalink) Old 09-27-2017, 02:58 PM
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Go with a 9" wheel. Offset in the +35 to +50mm range will minimize the chance that you will want a BMC. Your lift will not keep you from hitting the body mount if you hit a bump. You may get lucky with +25 or even +18. The BMC is no big deal IMO. It was more fun and less hassle than moving the liner forward. Get an angle grinder out and cut it!

These are the options you have with ~35s on 18" rims, normalized to 9" width rims. If you aren't offroading much, I'd go with 20" rims though, and 295/60r20s (~34") or 35x12.5r20.

295/70r18 (~34.3x12.0)
285/75r18 (~34.8x11.7)
305/70r18 (~35.1x12.6, not many options)
35x12.5r18(~34.6x12.1)
325/65r18 (~34.6x12.8)


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post #3 of 8 (permalink) Old 09-27-2017, 09:12 PM Thread Starter
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Go with a 9" wheel. Offset in the +35 to +50mm range will minimize the chance that you will want a BMC. Your lift will not keep you from hitting the body mount if you hit a bump. You may get lucky with +25 or even +18. The BMC is no big deal IMO. It was more fun and less hassle than moving the liner forward. Get an angle grinder out and cut it!

These are the options you have with ~35s on 18" rims, normalized to 9" width rims. If you aren't offroading much, I'd go with 20" rims though, and 295/60r20s (~34") or 35x12.5r20.

295/70r18 (~34.3x12.0)
285/75r18 (~34.8x11.7)
305/70r18 (~35.1x12.6, not many options)
35x12.5r18(~34.6x12.1)
325/65r18 (~34.6x12.8)
Yeah, I'm currently running the stock rims that come with the TRD off-road package (18x9s) and then a 1.5" spacer to fit 295/70r18 cooper stt pros. They're like 34.3x11.6 and so far all I did was trim the plastic in the fender well right behind the fog lights on the bumper, and then get some flush mud flaps to replace the old protruding mud flaps. I don't trail ever weekend, but I've taken it off road quite a bit and haven't run into any body mount issues so far. I am however looking to move up to the 305/70r18 cooper makes when I need to replace the tires. I'm also looking to buy new rims to eliminate spacers and all that too. But you really think I'd be hitting the body mount from bumps with around +35 to +20 mm offset? Also, will the sidewall clear the upper control arm with that offset?
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post #4 of 8 (permalink) Old 09-27-2017, 10:19 PM
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You have +22mm offset now. The 305/70r18s you are looking at are 35.1x12.5 on 9" rims, so significantly bigger than the 295/70s, or even 35x12.5s. https://tiresize.com/tires/Cooper/Di...-305-70R18.htm

I think you will hit the mount unless you have +35mm offset (and maybe even then), but it may not happen often enough for it to matter to you. +35 won't put you close to hitting the UCA.

How did you lift? If you have a spacer lift I'd suggest spending some money on at least 5100s, and set them to ~2" if you don't want to get UCAs.


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post #5 of 8 (permalink) Old 09-27-2017, 11:01 PM Thread Starter
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@rruff Wait so you're saying Ill hit the mount if I go over +35mm, or less than +35 like a +22? But I just used a spacer front and rear and managed to keep good angles in the front, and on the rear driveshaft and rides well and all. The truck already has bilsteins since it has the TRD package, so I'm not really looking to change the shocks right now.
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post #6 of 8 (permalink) Old 09-27-2017, 11:18 PM
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I think you'd need at least +35 to miss the mount. Every truck is different though. The alignment cams can be used to move the lower balljoint fore and aft if you haven't fully extended them to zero camber. With 3" lift they would be close to full extension.

Spacers alone are just a poor way to get lift, especially offroad. If you are happy with them though, it's not a big deal.


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post #7 of 8 (permalink) Old 09-27-2017, 11:26 PM Thread Starter
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I think you'd need at least +35 to miss the mount. Every truck is different though. The alignment cams can be used to move the lower balljoint fore and aft if you haven't fully extended them to zero camber. With 3" lift they would be close to full extension.

Spacers alone are just a poor way to get lift, especially offroad. If you are happy with them though, it's not a big deal.
Alright man, well thanks for the info. I think I will look for a +35 offset then. Gonna be hard though, I find most wheels to be around +20 and +18
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post #8 of 8 (permalink) Old 09-28-2017, 12:04 AM
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Alright man, well thanks for the info. I think I will look for a +35 offset then. Gonna be hard though, I find most wheels to be around +20 and +18
There are lots of +25, but +35 is kinda rare in 18". You could just cut the mount if you need to. It's not a big deal.

Wow a google search turned this up. $308 for 4 wheels! : https://www.customwheeloffset.com/bu...-custom-wheels

If you are into chrome.



This is a more popular option: XD Monster Wheels XD778 18X9 5X5.5" ( 5X139.7 ) & 5X150 Black 35 | XD77889086735



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2016 SR DC Long 4x4 5.7L. Intermittent wipers added (?!). MB TKO 18x9 +25. Hankook Dynapro ATM 325/65r18 (34.6x13) Future Offroad RV plans: Bed removed, homebuilt camper installed. Rear seat removed to make room for storage and bikes. King or ADS shocks with 700 lb springs, ~2" lift (may cheap out though). Rear leaves, maybe air bags. And more!

Last edited by rruff; 09-28-2017 at 12:09 AM.
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