Real/Practical Differences between TRD OR and PRO/TH Suspensions re: Fitting Larger Tires

[MikeD]

There are a ton of examples on this site where folks have put 285/70R18s on TRD PRO and Trailhunter, but fewer clear examples for the same tire on TRD Off-road (Premium or not).

The stock tires for these 4 trims are different brands but same size: 265/70R18. The stock wheels have different offsets: (ref: factory-wheels-tires-oem-offsets-bore-sizes-widths-brands-2025-4runner-6th-gen.)
TRD Off-road: +55
TRD off-road flat black (option): +45
TRD PRO (Black): +20
Trailhunter: +20

I'm contemplating putting 285s on my TRD ORP, using the +45 offset wheels (since I'd like to avoid changes from stock (except tire size)). And I'm trying to figure out whether all those references to putting 285s on TRD PRO without lift or rubbing will be true for the TRD Off-road trims.

Some pertinent facts (available from Toyota and here: 2025 4Runner Specs Product Info )
Overall height (does not include roof rails or roof rack) :
ORP*: 73.6" (*spec sheet says ORP on p. 3. I believe this is same for OFR non premium)
PRO/TH: 74" "

Ground Clearance:
OFR:: 9.1"
PRO/TH:: 10.1 "

I'm looking to better understand exactly how the PRO and TH get that extra .4" of overall height and 1" of ground clearance vs. the OFR trims AND how to reconcile those two differences. (I.e., I'd like to understand how both measurements can be true?)

I know the PRO has FOX QS3 shocks and the TH has Old Man Emos.

What is the "low point" where clearance is measured? Assumedly the suspended height is .4" higher from effectively longer springs/shocks but not sure if the clearance is to a frame location (or differential?) and where does that extra .6" come from?

I know there are a lot of experts here and I guess I could use a tutorial, and really would like that to come with facts based on the actual design of the different 4Runner trims.

I am looking to make a decision about tire size, but at this point I just want to understand the differences. And the AI answers that I have found seem wrong - arguing that tire size is the source of the difference in clearance when I am fairly certain the tire sizes are the same. (The Toyo Open Country A/T III All-Terrain tires (265/70R18) on the PRO/TH are the same diameter (32.6") as my Michelin LTX Trails. ref: Toyo A/T III specs)

Some other 4Runner6G.com links that don't quite answer my question but are valuable references:
orp-tire-and-wheel-sizes-no-lift.
ground-clearance-approach-angle-departure-angle-breakover-angle-6th-gen-2025-4runner.
stock-suspension-differences-sr5-vs-off-road-orp
factory-wheels-tires-oem-offsets-bore-sizes-widths-brands-2025-4runner-6th-gen.


Thanks in advance for any insight.

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[Joe Dirt]

There are a ton of examples on this site where folks have put 285/70R18s on TRD PRO and Trailhunter, but fewer clear examples for the same tire on TRD Off-road (Premium or not).

The stock tires for these 4 trims are different brands but same size: 265/70R18. The stock wheels have different offsets: (ref: factory-wheels-tires-oem-offsets-bore-sizes-widths-brands-2025-4runner-6th-gen.)
TRD Off-road: +55
TRD off-road flat black (option): +45
TRD PRO (Black): +20
Trailhunter: +20

I'm contemplating putting 285s on my TRD ORP, using the +45 offset wheels (since I'd like to avoid changes from stock (except tire size)). And I'm trying to figure out whether all those references to putting 285s on TRD PRO without lift or rubbing will be true for the TRD Off-road trims.

Some pertinent facts (available from Toyota and here: 2025 4Runner Specs Product Info )
Overall height (does not include roof rails or roof rack) :
ORP*: 73.6" (*spec sheet says ORP on p. 3. I believe this is same for OFR non premium)
PRO/TH: 74" "

Ground Clearance:
OFR:: 9.1"
PRO/TH:: 10.1 "

I'm looking to better understand exactly how the PRO and TH get that extra .4" of overall height and 1" of ground clearance vs. the OFR trims AND how to reconcile those two differences. (I.e., I'd like to understand how both measurements can be true?)

I know the PRO has FOX QS3 shocks and the TH has Old Man Emos.

What is the "low point" where clearance is measured? Assumedly the suspended height is .4" higher from effectively longer springs/shocks but not sure if the clearance is to a frame location (or differential?) and where does that extra .6" come from?

I know there are a lot of experts here and I guess I could use a tutorial, and really would like that to come with facts based on the actual design of the different 4Runner trims.

I am looking to make a decision about tire size, but at this point I just want to understand the differences. And the AI answers that I have found seem wrong - arguing that tire size is the source of the difference in clearance when I am fairly certain the tire sizes are the same. (The Toyo Open Country A/T III All-Terrain tires (265/70R18) on the PRO/TH are the same diameter (32.6") as my Michelin LTX Trails. ref: Toyo A/T III specs)

Some other 4Runner6G.com links that don't quite answer my question but are valuable references:
orp-tire-and-wheel-sizes-no-lift.
ground-clearance-approach-angle-departure-angle-breakover-angle-6th-gen-2025-4runner.
stock-suspension-differences-sr5-vs-off-road-orp
factory-wheels-tires-oem-offsets-bore-sizes-widths-brands-2025-4runner-6th-gen.


Thanks in advance for any insight.

Hello, I know this is an old thread but I remember reading that you ended up replacing your factory orp Wheels with the TRD Pro Wheels. I'm going to do the same thing because of the wheel size on the orp being only 7.5 in wide. So I'm wondering if you have ever weighed your TRD Pro wheel? And this is without a tire. Somebody mentioned there around 35 lb a piece, I can't remember. Thanks in advance if you know

 

[MikeD]

Turns out I did weigh the tire plus wheel combo. I don't claim this is a particularly accurate weight measurement - its on a Garmin bathroom scale. The tire just fits and balances. this is TRD Pro wheels with Toyo 285/70/18 E-load tires. They are specified to be 57# by Toyo. This would make the wheel 40# (less the weight of the air??) - which seems high but you make the call on my measurement technique.
For comparison, the TRD Flat Black option wheel measured at 28#. Its 8" vs 8.5" width of the TRD Pro wheel.

Note that I've switched the Toyo 285/70 tires to these wheels because I was getting rear wheel rub on fenders off-road and the change in offset (+45 vs +20) made the difference. It also eliminated the very slight front tire rub on the felt & air dam screw tab. Bottom line: For TRD Off-road there is no question in my mind that the closer to stock offset is better choice for fitting larger tires. (I've seen folks suggest that less offset is better but my data says they are wrong.)
And, although I don't trust my measurement technique, it would appear/seem that the TRD Pro wheels are heavier than the TRD Flat Black option wheels - consistent with the slightly smaller width.

TRD PRO Wheel with Toyo 285/70 E-load:

TRD Flat Black Option wheel:

All the 2025 18" 6G4R wheels for grins:

 

[MikeD]

Hello, I know this is an old thread but I remember reading that you ended up replacing your factory orp Wheels with the TRD Pro Wheels. I'm going to do the same thing because of the wheel size on the orp being only 7.5 in wide. So I'm wondering if you have ever weighed your TRD Pro wheel? And this is without a tire. Somebody mentioned there around 35 lb a piece, I can't remember. Thanks in advance if you know

BTW - thanks for responding... and to everyone else out there: Still looking to better understand the suspension differences....

 

[1Volfan]

New Trailhunter owner here that was also curious as to what made up the rest of the height difference. My guess is it’s the “high clearance” front bumper aka viper cut.

 

[fur_runner]

Some pertinent facts (available from Toyota and here: 2025 4Runner Specs Product Info )
Overall height (does not include roof rails or roof rack) :
ORP*: 73.6" (*spec sheet says ORP on p. 3. I believe this is same for OFR non premium)
PRO/TH: 74" "

Ground Clearance:
OFR:: 9.1"
PRO/TH:: 10.1 "

I'm looking to better understand exactly how the PRO and TH get that extra .4" of overall height and 1" of ground clearance vs. the OFR trims AND how to reconcile those two differences. (I.e., I'd like to understand how both measurements can be true?)

I know the PRO has FOX QS3 shocks and the TH has Old Man Emos.

What is the "low point" where clearance is measured? Assumedly the suspended height is .4" higher from effectively longer springs/shocks but not sure if the clearance is to a frame location (or differential?) and where does that extra .6" come from?

Two things I noticed in the link is that only the TH says the overall height is without the roof rack. The other is that the dimension category for the OFR doesn't specify hybrid or not.

The ground clearance is set by the cross member on the transmission for the hybrids, and it's noticeably worse than the gas trucks.

Hybrid

Gas

And since all the TH are hybrid, if they have more ground clearance than the other listed trims, it means they HAVE to have higher suspension. And if they have higher suspension and lower max heights, then to me it's either two options:

1. The TH is measured w no roof rack, but all the other models are measured with with rails, or
2. It's just an error

Both are pretty undramatic, unfortunately

 

[NotApplicable]

Two things I noticed in the link is that only the TH says the overall height is without the roof rack. The other is that the dimension category for the OFR doesn't specify hybrid or not.

The ground clearance is set by the cross member on the transmission for the hybrids, and it's noticeably worse than the gas trucks.

Hybrid

Gas

And since all the TH are hybrid, if they have more ground clearance than the other listed trims, it means they HAVE to have higher suspension. And if they have higher suspension and lower max heights, then to me it's either two options:

1. The TH is measured w no roof rack, but all the other models are measured with with rails, or
2. It's just an error

Both are pretty undramatic, unfortunately

Hmm, but the crossmember pointed out isn't the lowest point. So the real question is how ground clearance is measured. You'd expect it to be min ground clearance, aka measurement to the lowest-hanging fruit. Notably, the only thing that can put more space between the ground and the pumpkin is larger diameter tires.

 

[MikeD]

Hmm, but the crossmember pointed out isn't the lowest point. So the real question is how ground clearance is measured. You'd expect it to be min ground clearance, aka measurement to the lowest-hanging fruit. Notably, the only thing that can put more space between the ground and the pumpkin is larger diameter tires.

Concur. And I am not saying that the rear differential ("pumpkin") is the low point because I'm not at all certain about that but its the lowest spot I measured - other than the air dam.
Here is what I have measured on my TRD ORP hybrid so for what its worth (photos below):

1. Stock rear diff clearance: ~9.5"
2. Stock center Crossmember clearance: ~10.2" (Toyota frame parts diagram calls this part N4 (#4 assumedly since #1, #2, #3 all labeled forward) and refers to it as center. PN 51205E. I think this is what is referred to above as "transmission crossmember". End of transmission is above it (I think). Gas tank is behind it. (Helpful links: 6G4R Frame Parts diagram & Inspection of 6G4R from below (note non-Hybrid))
3. Stock rear suspension knuckle: ~9.5" (incorrect name?)
4. Air dam clearance: ~8". Since this is an inch or so less than the spec and its SO much lower than next closest value I assumed this was not the clearance referenced in the spec values. 2025 4Runner Specs Product Info But who knows.

I've also got all these measured after the 1.25" Peak leveling spacer installed and with larger tires. I gained clearance everywhere. (Rear Diff now at almost 11" - more than I would expect from tires (285/70/18 Toyo A/T III) that are a bit more than an inch bigger than stock - not sure how that leveling spacer would lift the back end but here is the evidence with the same 3" Stanley tape measure:

1. Stock rear diff clearance: ~9.5"

2. Stock center Crossmember clearance: ~10.2"

3. Stock rear suspension knuckle: ~9.5"

4. Air dam clearance: ~8"

None of this answers my original questions but maybe the 9.1" is conservative and my ~9.5" rear diff clearance is a better "actual" for my stock ORP? One thing for sure - my changes have kept me from scraping on rocks (on Walters Gap Trail in Gel Wash Natl Forest in VA) that caused some damage to front left knuckle when I went up stock.
I'm fairly certain both the TH & TRD Pro strut assemblies must be an inch or so longer than my ORP Bilstein assembly and that is where the difference comes from (and the geometry is different to optimize scrub angle with the +20 offset wheels.) But I don't have data for that - just educated conjecture.

 

[Joe Dirt]

Turns out I did weigh the tire plus wheel combo. I don't claim this is a particularly accurate weight measurement - its on a Garmin bathroom scale. The tire just fits and balances. this is TRD Pro wheels with Toyo 285/70/18 E-load tires. They are specified to be 57# by Toyo. This would make the wheel 40# (less the weight of the air??) - which seems high but you make the call on my measurement technique.
For comparison, the TRD Flat Black option wheel measured at 28#. Its 8" vs 8.5" width of the TRD Pro wheel.

Note that I've switched the Toyo 285/70 tires to these wheels because I was getting rear wheel rub on fenders off-road and the change in offset (+45 vs +20) made the difference. It also eliminated the very slight front tire rub on the felt & air dam screw tab. Bottom line: For TRD Off-road there is no question in my mind that the closer to stock offset is better choice for fitting larger tires. (I've seen folks suggest that less offset is better but my data says they are wrong.)
And, although I don't trust my measurement technique, it would appear/seem that the TRD Pro wheels are heavier than the TRD Flat Black option wheels - consistent with the slightly smaller width.

TRD PRO Wheel with Toyo 285/70 E-load:

TRD Flat Black Option wheel:

All the 2025 18" 6G4R wheels for grins:

Well I did measure my original TRD off-road wheels with the silver pseudo beadlock and found that they are seven and a half inch wheels measured from the bead. This is consistent with specifications online for this particular type of wheel. I did purchase for of the pro Wheels like you have in your picture at the very bottom with the honeycomb pattern and they measure from B to be at 8.5 in. And they have the 20 offset. I had nothing to compare the weights to and felt that the pro wheel felt fairly solid and heavy.

I plan on using my TPMS sensors from the takeoffs. Did you have any problem with your wheel supplier doing an TPMS R&R from your old Wheels to new?

Thanks in advance

 

[MikeD]

I plan on using my TPMS sensors from the takeoffs. Did you have any problem with your wheel supplier doing an TPMS R&R from your old Wheels to new?

I handed down my TRD ORP stock wheels to my son for his 5th gen 4R (offset and lug size adjustment with spider spacer designed for exactly this) SO I did not have TPMS removed and reinstalled on new wheels - but now that I've bought two additional sets of TPMS (and dealt with some programing snafus), I believe this should be a no-brainer solution for which you don't even want the tire folks to mess with reprograming. Since the TPMS are already registered to the car, you should just need to treat it like a rotation - see in the manual: "Registration of the position of each wheel after performing a tire rotation". But you might also want to read about registering ID codes further on in the manual just so you understand the difference.

 

[Joe Dirt]

I handed down my TRD ORP stock wheels to my son for his 5th gen 4R (offset and lug size adjustment with spider spacer designed for exactly this) SO I did not have TPMS removed and reinstalled on new wheels - but now that I've bought two additional sets of TPMS (and dealt with some programing snafus), I believe this should be a no-brainer solution for which you don't even want the tire folks to mess with reprograming. Since the TPMS are already registered to the car, you should just need to treat it like a rotation - see in the manual: "Registration of the position of each wheel after performing a tire rotation". But you might also want to read about registering ID codes further on in the manual just so you understand the difference.

Yes I completely forgot it's just like a tire rotation. I remember in my other cars with TPMS sensors I didn't do anything after rotation. But thanks I will keep an eye out for that and read up on it. Probably not getting tires until next month for presidents Day sales.

Hopefully I will be able to sell the wheels and the tires. I never have much luck with selling used tires and wheels unless I practically give them away.

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