Changed out spare tire to 33". Fits perfectly undercarriage!

[BonRunner]

I have upgraded 33" tires (275/70/18) on the 18" Pro wheels and was concerning about smaller 31", dingy Goodyear tire on the spare 17" wheel.

Running mismatch tires' diameter can be bad for your differential.

After quick research, I settled on the RBP Repulsor A/T at 255/80/17 size that's 33". I haven't heard about this brand before but it's a decent Chinese-brand (tire was made in Morocco) & mostly positive feedback online. For a spare, I think it should be fine. I got Discount Tire to changed it out on my spare at $0 cost!

Fitting it back under the car wasn't an issue. All went smoothly & made the rear bit more aggressive

The RBP Repulsor A/T tire was only $120 btw!

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[John2112]

I have upgraded 33" tires (275/70/18) on the 18" Pro wheels and was concerning about smaller 31", dingy Goodyear tire on the spare 17" wheel.

Running mismatch tires' diameter can be bad for your differential.

After quick research, I settled on the RBP Repulsor A/T at 255/80/17 size that's 33". I haven't heard about this brand before but it's a decent Chinese-brand (tire was made in Morocco) & mostly positive feedback online. For a spare, I think it should be fine. I got Discount Tire to changed it out on my spare at $0 cost!

Fitting it back under the car wasn't an issue. All went smoothly & made the rear bit more aggressive

The RBP Repulsor A/T tire was only $120 btw!

Looks good. My Trail Hunter came stock with 33-in tires along with the spare, I assume they made that space the same for all models.

 

[Xhale760]

when running the pro rims i used a fullsize spare. Now on different rims and on 35s. Need to figure out a spare -_-

 

[BonRunner]

when running the pro rims i used a fullsize spare. Now on different rims and on 35s. Need to figure out a spare -_-

I had that in mind but 275/70/18 on 25mm offset Pro wheel wouldn't fit under the car. I don't want to get swing out tire carrier

 

[ThatSickRIp]

Nice! Your spare wheel looks different than what was on my SR5. Mines a gloss black 5 spoke, but still skinny as hell and had to swap it when I got new tires.

I went with Cooper Discoverer AT3s that Tire Rack had for $180 each (had several sets on my F150s and no issues) so I got 5 and ordered a spare OEM SR5 wheel for $200 and placed that in the spare holder. Ill do 5 tire rotations since theyre all identical.

Got the look I was going for, matching spare, and all less than going with similar Falkens, Toyos or Nittos

 

[BonRunner]

Looks like this bracket is what's keeping any tire larger than 33.2" for the spare.

 

[RunnerRocks]

There are two "L" shaped brackets that provide the upper and forward limits.

 

[Desert_6Gen]

Hate to burst your bubble; but it's already known 33's fit as the spare. Every trim except the SR5 has full size 33" spares. Why would you go cheap and buy no named tires? It's the only safety equipment separating the vehicles from the road. That's one thing you should never cheap out on.

 

[BonRunner]

Hate to burst your bubble; but it's already known 33's fit as the spare. Every trim except the SR5 has full size 33" spares. Why would you go cheap and buy no named tires? It's the only safety equipment separating the vehicles from the road. That's one thing you should never cheap out on.

First off, not every trim gets a 33" spare. My TRD Sport Premium comes factory with a 245/75/17, which is a 31.5" tire.

Running a 31.5" spare alongside 33.2" main tires (275/70/18 Falken Wildpeak AT4Ws) is asking to fry differentials and freak out the drivetrain sensors if you get a flat. That was the whole point of replacing it.

Second, I have full replacement road hazard certificates through Discount Tire for my primary set. If a tire blows, the spare literally only exists to get me off the trail or down the road to the nearest shop for a free replacement.

Why blow $330+ on a name-brand 33" tire plus another 18" wheel when a $120 10-ply, E-load, 3PMSF tire on the steel 17" spare does the exact same emergency job? It’s a temporary spare, not a daily rotation tire.

Matching the rolling diameter to protect the drivetrain was the goal, and it's handled. You're blowing this way out of proportion.

 

[Joestac]

I had that in mind but 275/70/18 on 25mm offset Pro wheel wouldn't fit under the car. I don't want to get swing out tire carrier

FYI, I know you are happy with what you got, but a 275/70/18 will fit under there with there. The TRD Pro and Trailhunter wheels have the same offset, it is 20mm. I have 5 x 275/70/18 Toyo ATIII in E load at 33.19" diameter. Just in case you ever want to make changes.

 

[RunnerRocks]

Our ORP also has 5 x 275/70/18 Toyo ATIII tires in E load.

What difference does the wheel offset have on whether the spare fits or not ? The tire rubber tops out against the upper stops, not the wheel. The lift chain bracket might end up at a slightly different height.

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