Oh no. Please don’t go by that. The columns are screwed up. Already a thread on how wrong that compare page is.Thanks for all the work!!!!
According to Ford... the OBX has the largest (non Sasquatch) tires.
You are so right!
Does this mean we can install 285/70R17's on the OBX without doing other mods?I added offset to the original version (which came directly from Ford)
Not sure what you're seeing in that chart that lead you to that conclusion, but all your answers probably lie in this thread:
Thanks for your feedback... I just got back from the dealer... changed my order from OBX to BL with 285/70's AT. Also dropped the leather so my build had none of the 6 delayed features.
Awesome work on this thread. I'm just going to throw some 285/70R17's on stock Big Bend rims, so looks like clearing the suspension components and crash bars won't be an issue. Nobody will be able to tell the difference between these and a 33.3" tire really. Worth it to not be so tight on clearance.
To be honest I'm still getting a crash course in this "what can I fit" stuff, so take my comment with a grain of salt.....
I will be doing that exact thing to my OBX within a week so I'll let you know
Thanks so much for all the work and info on this! It helped me make my decision to go OBX and put on some 275/70R18 on the stock wheels right out of the gate. Thinking Pirelli Scorpion AT Plus with a buddy of mine vouching for them and the great reviews. Mostly looking for good on road tire that can tackle the trails with ease as well. They look much better than stock tires too.@Administrator for updated sticky
12/13 update. Ford updated upper control arms on sas have been identified on big bend! They are not carried over from ranger and protrude less. Ranger guys have fitment issues due to this and it looks like Ford has improved on this. They shaved off what looks like almost 1/4” from the lip of the control arm
we also confirmed all offsets. Below shows the factory confirmation of 1” backspacing on big bend. And the height of control arm sits just above big bend tire. Knowing offsets and tire sizes we can now accurately carry over the spindle from trim to trim.
below shows big bend, OBX, OBX with 275/70r18 (33.25x11.1), badlands, and Sasquatch. OBX upgraded tires show no issue if badlands fits.
Face of steering knuckle to mounting plate is 8 -5/8 shown on all models. The tightest two scenarios are stock BL and OBX with upgraded tires seeing 5/8” backspacing at steering knuckle and 3/8” at upper control arm
12/12 update. Did some Ranger testing. It looks to be the same assembly. Photos below of the ranger vs sasquatch internal - very similar control arm.
Now - @LEGEND gave us the clearance behind the tire. What we did not account for is the control arm protruding out when you have a much taller tire. After checking a Ranger outfitted with 30.5x10.6 tires (i looked up the exact tire) the clearance behind the tire was around 0.85" after sitcking my phone and thumb, it looks to be fairly accurate. HOWEVER, the control arm protrudes at the top and is almost align with the back of the tire. It probably protrudes 0.5-06". So if you were to go 33.0+ to a taller tire, youre starting to get close to that control arm. What did check out literally on the nose, is that all of my numbers imply the distance the front area below the control arm to the wheel mounting point is 8.85" (given Legend's 1.0" figure on the Bid Bend 10.4" wide tire). After backing into the ranger wheel and tire specs, with my 0.85" Ranger clearance dimension on took on-site today, guess what I got to? 8.80". So the assembly on the Ranger must be basically identical to that on the Bronco.
I probably lost you at this point, but, in summary -
Unless the control arm is fashioned differently on the Bronco, it seems like the max tire would be 275/70/R18. I said previously 33.7" would fit, but it seems like they may not. The constraint here is the upper control arm, not the crash bars. Anything above ~33.2, you would probably need a bigger offset. The crash arms do not become the constraint until you go up to 34.2" wide tires seem like the max with occasional rubbing on the crash bars during articulation (which could be fixed by modifying or removing).
With no modifications - 33.2x11.2 (275/70/R18) is the max in stock form.
Add more offset, and you could go into the low 34" range until crash bars need to be modified/removed.
Using my fingers for references, and holding a ruler up to different fingers to back into what a 33.25 x 11.1 tire would look like compared to the Ranger's 30..5 x 10.6, it looks like this (i outlined the existing wheel and moved it .30" to the left and up 1.375".
In theory, this all makes sense, since the Badlands is a 32.7x11.2, (also on a 55 offset) so a 33.2x11.1 is slightly pushing the limits on clearance over the BL tire. Anything more than that it starting to get awfully close to the control arm, especially if it has a straight/aggressive sidewall
OLD - 12/7 update from Legend: Here we go! Measurements taken with square and tape measure, free hand. I've been doing this stuff for most of my career, so I am generally pretty damn good, so measuring horizontally center spindle nut- front bar face=18-3/8" ...center spindle nut-rear bar face=18-7/8" front face to rear face=37-1/4". also measured heights above center spindle nut. just say for ease, each tube is 1-1/2'" square. At mid plane front tube is 8" above center, rear tube is 5" above center
Drawings below - This is of a 33.7" x 11.2" on a stock OBX. I am seeing 2.0" from rear crash bar. In a top down view in full turn, 13/16" clearance. For front crash bar, those dimensions are 1.5" and 3/8" respectively. However, note the front crash bar sits higher, so that clearance, when viewing the profile of the wheel, at a diagonal is 2". To be more specific on that - Youll see a red oval behind the wheel, that is in full turn. In the upper right, the distance from the red oval to higher front crash bar is 2" at a diagonal.
In top down view, i am seeing the tire clear the spindle by 9/16" (this is the one dimension that isnt as 'matter of fact').
Previous update - To skip all the hypothesizing and technicals go straight to page 6 where we confirmed clearance, backspace and offset on a Black Diamond
Every dimension here is from Ford or the tire manufacturer, I’m able to back into the rest given the track, overall width etc. Big focus here is the depth of the tire, not the width. The only number made up was the clearance behind the wheel but that’s just a baseline. And the wheel gap was also a baseline based on the second drawing I did a couple weeks ago (which actually checked out later when Ford said the Badlands lift was 10 mills less the Sasquatch = 0.4” per my estimation).
Enjoy.
Looks like a 275/70/R18 is the money size tire for an OBX. And it’s 33.2” so almost half an inch bigger than 32.7” badlands but 0.4” narrower. I chose this tire to safely get to the same Sasquatch wheel gap and Sasquatch clearance behind wheel. Are all numbers exact, no? But it’s all RELEVANT. If the clearances match that on the Sasquatch that it means it’s totally safe.
I’m sure you could go even bigger, but this tire size seems to be best to match Ford factory clearances on the Sasquatch.
A few months late to this thread but just wanted to say this was helpful after recently ordering an OBX. I've since seen photos of 275's installed with no issue but was unaware of the E-rating making that much of a difference. Looks like the General Grabber A/TX below doesn't carry that designation and will be a option for me.Found a second option on tire. Someone else recommended Bridgestone Revo 3s in 275/70/r18. The confusion was that these are actually E load. However they only have a weight of only 50 lbs. so lighter than duratrac at 53.7. FYI the KO2s in this size E load are about 58 lbs. so Revo 3s are by far the lightest in the class and weigh the same as 285/70/17 ko2 c load on the badlands which are also 50 lbs. Very good reviews on wrangler forums. Ratings for ride comfort and noise are actually better than Duratrac D load. So if the weights down and the ride comfort and noise ratings is very good maybe it’s not as problematic that they are E load. Better than duratrac and ko2 in wet. Same as ko2 in snow, however duratracs d load seem best in snow with a penalty on weight and ride comfort.
FYI all rating are better than stocker duellerà which are junk. So overall it should be an improvement.
discussion between Revo 3 and Duratrac. Funny how I’m ending up where others are at. https://www.toyota-4runner.org/5th-gen-t4rs/266865-wrangler-duratrac-vs-revo-3-a.html
EDIT - Found a third tire. And possibly the best. A new lightweight E load that’s aggressive. Came out this year and weighs in at 52 lbs AND it’s 33.4- 33.5” diameter. Aiming for this one. Link below. Toyo All Country AT3 275/70/r18
https://www.fourwheeler.com/how-to/wheels-tires/toyo-at-3-all-terrain-tire-review/
