Is this going to rub?

Well, as a noob, I have a noob question. I have searched many, many threads and found much info about tire sizes, spacers, cab mount chops, and wheel offset. I am building my new Tacoma to replace my 2010 Xterra, which was significantly built up and took me everywhere I ever asked it to.

I'm trying to piece together the various information I've received from different threads, but there isn't a ton of correlation between the various components (at least not in the threads I found). Just things like "will I need a lift with 285 tires?" or "will I rub with no trimming and 1.25" wheel spacers?" So here is my planned setup. Please let me know if you think this is going to rub when cycling the suspension (yes, the rig will be taken off road!):

I have a 2020 DCSB TRD Off-road. I have purchased a set of 2019 TRD Pro front coilovers and rear shocks, and I am installing the Westcott lift kit in the front (replaces the lower spring perch on the coilover and adds a sligth preload to the coil), and I'm planning to run a 1.5" Headstrong Off-road progressive add-a-leaf in the rear (whenever they come back in stock). I just installed 285 75 16 (33") Goodyear Wrangler Duratrac tires today on the stock OR wheels, and I'm planning to run a 1.25" spidertrax spacer to get a slightly more aggressive and stable stance. I am having a CMC performed this weekend by Ghost Ship, and he will also be flattening out the front fender pinch welds. Is there more work required besides the modest lift (approx. 2 inches in the front and 1.5 in the rear), and the CMC/pinch weld? I am not comfortable hacking up the fenders until I at least get some trail pinstriping on it.

Any input about what I should expect is appreciated, and please remember to be nice to the new guy. I'm only new to Toyotas, not new to the world of modifying vehicles or taking them off road.

 

You will probably have rubbing issues. I have 265/75r16’s with Spidertrax 1.25” spacers (Approx -6 offset). Here are photos with the clearances. It looks closer, but there is about 1/2” clearance at the back of the wheel well with the wheel turned. With the 33” wheels you are looking at you will probably need to do a little trimming.

 

Thank you for the info. Are you running any kind of lift? I can see the TRD Pro coilovers in your last pic, but are you sitting at the stock Pro height in the front?

 

You need to know that a lift won't prevent rubbing issues. Let's say your tires rub at stock height. You then lift it three inches. As soon as your suspension compresses three inches (off roading. Hard corner, bumpy road) you will rub.
You need to be able to fit the tires at stock height with no rubbing, THEN lift if needed.

 

Understood, and thank you for that info. I also understand that lifting the vehicle can/does change the geometry of the wheels as they travel up and down and turn side to side, which is the only reason why I was inquiring if his rig is at the stock height or not. I'm just trying to determine exactly how much work/trimming needs to be done before I head to the fabricator on Saturday. I may just have to ditch the idea of the spacers, but then I'm worried about rubbing on the UCA with the stock wheels and these 285 tires. Seems like having to trim some plastic in the inner fender would be a better option than rubbing the UCA, unless I can swap the UCAs out with different ones that don't rub. The OEM UCAs look pretty low profile to me, so I'm not even sure if any of the aftermarket options will correct that (I'm still doing that searching/research now).

FWIW, the tires were just installed last night, so now the task at hand is making everything fit. Just making sure I'm investing in the proper combination of parts and fabrication for this setup to be just right.

 

I keep scouring more threads about trimming and rubbing, and I'm learning more with each one that I read. It seems the consensus is that a 4.5" of backspacing is the sweet spot to prevent rubbing on the UCAs and require minimal trimming of the fender liner when running 285 width tires. Anything more than 4.5" is going to rub the UCA, and less than 4.5" will push the tire too far outward and make it more likely to rub on the inner fender when turning. Again, I'm already doing a CMC and flattening the pinch weld, so no worries there. So now I've been playing with a tire/wheel calculator trying to figure out my best options. I'm going to vocalize and visualize what I am finding, in hopes that it'll help other noobs who are searching for similar info, and for others to sanity-check my findings to make sure I'm doing this right.

The stock OR wheels have a +25mm offset and they are 7" wide, which creates a 4.98" backspace. That is why the wider tires rub on the UCAs. You can see here that the 285" tire on this setup ends up being almost a half inch closer to the UCA than the OEM tire size:



So the proper width spacer to achieve a 4.5" backspacing with the factory TRD OR wheels would be 1/2 of an inch (12mm), which would change the offset to +13 mm. Here's the visualization of that, and you can see that the inner edge of the tire is basically in the same position as the stock configuration, and the outer sidewall would protrude a little less than an inch more than the stock configuration.



But, in doing this research, I've also learned that you'd have to cut down the factory lug studs to accommodate that small of a spacer, which is not something I'm willing to do. I'm seeing mixed opinions on whether a .75" spacer requires trimming of the studs. Some have said yes, and others said they were ok as long as there is a slight void space inside the hub mount lip of the wheel. If I can get away with a .75" spacer, that would create 4.24" of backspacing, and would still be pretty ideal with the inner sidewall being 3/8" of an inch further from the UCA than the stock configuration. The outer sidewall would now stick out 1 1/8" further than the stock configuration.



If the 3/4" won't work and I need to jump all the way to a 1" (25mm) spacer, that would put me at about 4" of backspacing. The inner sidewall now has plenty of space, being more than a half inch further from the UCA than the stock configuration, but now I'm pushing the outer sidewall out by almost an inch and a half more than stock. With the CMC and pinch weld being taken care of, I'm hoping it'll just be some inner fender plastic that needs to be heated or slightly trimmed.

 

No lift, stock TRD Pro suspension.

 

Someone kindly correct me if I’m wrong, but I have stock 17” (TRD Sport) wheels not 16” ... but the idea was the same with either rim size.

I thought I have read that 275/70 tires were the max size to fit without having to do any modifications.

Is this correct, or did I just dream it?

 

Are the OEM Pro rear shocks going to be OK with a 1.5 inch lift in the rear?

 

According to Headstrong a 1.5” lift on the rear with the TRD Pro shocks is not an issue. I am waiting for their HS 3 leaf progressive AALs to come back in stock to order.

 

From what I've read, that's about the max I can squeeze out of the rear with those shocks. The Westcott kit is actually supposed to include a 1.5" lift spacer for the rear axle, and there are quite a few people running that kit with no issued. I opted for only the front setup of the Westcott kit so that I could run the Headstrong AAL in the rear instead. With my RTT mounted over the bed and loaded down for camping, I need to stiffen up the spring pack a little so the block isn't the best option.

Edit: you made me second guess myself, so I checked again. It looks like it's actually a 1" lift block supplied with the Westcott kit, not 1.5". I don't think that extra half inch is going to be an issue with the rear shocks, especially with the weight I'll be running. Plus, a few folks in the Headstrong thread for the AAL said they ended up with just less than the 1.5" of lift advertised (which of course will vary depending on how much weight you're running and the condition of your OEM leaf packs). Again, I think it'll be just about right.

 

Sounds like you’ve done a lot of research OP.

Another thing to consider is getting 4 degrees of caster to avoid rubbing behind the wheel. Good luck! Let us know how it turns out

 

275 are max on the 7" wheels. Perhaps that's what you're remembering.

 

Stock OR wheel is +25 offset while your Pro stock wheels are +5 offset. Same OE wheel size would be 0.83" further out than OP's OR.

 

Thanks! I'm trying to do as much research as possible to avoid being that guy who asks the same questions as every other new member

Appreciate the tip about the caster adjustment. I'm going to have to find a good alignment shop in my area that knows their way around a lifted Tacoma. Most of the shops around here just stick sensors on the wheels and dial everything in to the factory specifications.

 

His avatar says he's got a TRD OR with Pro suspension, so basically the same setup I'm going to be running (assuming he's still running the Off-Road wheels)

 

Yeah best to find a shop familiar with lifted and modified vehicles. I am lucky to have one close by which has helped me on numerous occasions.

 

I missed that. I thought it was a Pro!

 

I am getting 265/75/16 Duratracs Friday mounted on stock 2016 TRDOR wheels, everything else is stock for suspension on my 2016 TRDOR. I am being told by guys on this forum I will have no rubbing up front on fender well, mud flaps, etc. If I did get some rubbing with wheel turned to lock, would installing the 1.25 Spidertrax spacers help or hurt? I guess I can always just remove the front mud flaps but I prefer to keep them. Thanks

 

If you end up with rubbing on the mud flaps or plastic fender liner, then spidertrax spacers would make that worse. Pushing the wheel/tire outwards (away from the vehicle) changes the geometry and creates more opportunities for the tire to rub when you're at full lock. However, when you're running larger (wider) tires than stock, the issue is that they'll also rub against the upper control arm when you're at full lock, which is why some people need to run the spacers (like me). I went straight from a 265/70/16 (31) to a 285/75/16 (33), so I can't share experience with the 265/75/16 (32) size that you're installing. But in reading around, it sounds like many people are running that size on the stock wheels without rubbing the UCAs and with minimal to no rubbing of the plastic.