39 to 40 Inch Tires for the Bronco Raptor

[TurboS]

Discount Tire told me production is on the horizon and the 39" KO2 may be available in 10-12 weeks.

K02 or the new K03?

 

[Tye]

K02 or the new K03?

K02 . Even if the K03 comes out, Im sure the 39" will be one of the last sizes they produce.

 

[GC Bronco]

40's look pretty cool on these, but having to run a 3" lift collar to clear them just doesn't seem like a great idea. I'm always concerned about CV angles and premature wear when you start getting that far out of factory range. Maybe it would be a non-issue, but I'd rather run a 1.5" collar and 39" BFGs. Actually, I think it looks perfect with 39s and no collar, but if you are going to run it hard offroad you are going to want a little lift. 39s are just right from a proportion standpoint in my opinion.View attachment 6607

What is the overall increase in hight with this setup? I would assume that 2.25 collars running 39s would add 3.25 to the vehicle height? Did you say the 39s will clear with 1.50 collars?

 

[CustomPerformance]

What is the overall increase in hight with this setup? I would assume that 2.25 collars running 39s would add 3.25 to the vehicle height? Did you say the 39s will clear with 1.50 collars?

Yes, your assumption is correct. Overall height increase is going to be whatever your lift height is, plus 1/2 the change in tire diameter increase. Ie, if your stock 37 BFG is actually 36.5" tall, and you go to the 39 BFG (38.5"), you will add 1" to your lift height to get the overall increase. So, 2.25" collars and 39s adds 3.25" to total height. No lift with 39s only adds 1" to overall height of the truck.

39's clear with no suspension mods for most street driving. I think you could easily get away with 1.5 collars for all but the most extreme off roading.

 

[CustomPerformance]

and, not to mention the extra 10+ lbs going to 40's.

Is this CG Bronco Raptor on spring collar lifts? Looks Perfect! Thank you for sharing.

No lift on the CG BRaptor. Stock suspension. It really is a great proportion/look.

The only downside to the BFG 39 is that it is considerably more expensive than something like a 40x13.50r17 Toyo MT. Like $250 per tire different, so that adds up when you are getting a set of 5 tires. The Toyo is almost 1-1/2" taller though. You aren't going to fit that on a BRaptor without doing a lift of some sort.

 

[GC Bronco]

Yes, your assumption is correct. Overall height increase is going to be whatever your lift height is, plus 1/2 the change in tire diameter increase. Ie, if your stock 37 BFG is actually 36.5" tall, and you go to the 39 BFG (38.5"), you will add 1" to your lift height to get the overall increase. So, 2.25" collars and 39s adds 3.25" to total height. No lift with 39s only adds 1" to overall height of the truck.

39's clear with no suspension mods for most street driving. I think you could easily get away with 1.5 collars for all but the most extreme off roading.

Here is how it turned out. Went with the 39 BFGs and the 1.5 collar.

 

[Jetg]

Here is how it turned out. Went with the 39 BFGs and the 1.5 collar.

What is the over all height?

 

[GC Bronco]

What is the over all height?

I haven’t measured, but I know it is right around 81 inches.

 

[Tye]

Here is how it turned out. Went with the 39 BFGs and the 1.5 collar.View attachment 7202

nice! RPG or Foutz collars?

 

[GC Bronco]

RPG

nice! RPG or Foutz collars?

 

[CustomPerformance]

Here is how it turned out. Went with the 39 BFGs and the 1.5 collar.View attachment 7202

Looks great! These trucks just look right with 39s. And still drive great.

 

[Tye]

RPG

Would you be able to get the alignment specs your shop used and share?

 

[TurboS]

On OEM forged wheels with beauty rings removed.

 

[fuhrius]

On OEM forged wheels with beauty rings removed.

beast. I'm liking the look of that soft top on the BRap too...

 

[Tye]

39s on, next up lift collars and suspension pieces.

 

[fuhrius]

39s on, next up lift collars and suspension pieces.View attachment 7322

that looks nice.

 

[Tye]

spare tire fits as well and heres a comparison of 37 vs 39 ko2

 

[TurboS]

spare tire fits as well and heres a comparison of 37 vs 39 ko2

View attachment 7325View attachment 7326View attachment 7327

Looks Great! Our 37's are starting to look... small. I like the tire to flare stick out, looks perfect, Well Done!

How does it drive? You noticed the -10 lbs per wheel when you went to the RTR wheels, you must notice gaining the tire weight along with the taller tire/gearing.

 

[Dragoon]

39s on, next up lift collars and suspension pieces.View attachment 7322

That looks fantastic! I can't wait to see it with the lift.

 

[Jimmy Steel]

Are you guys getting the same size colars all around, or a bigger colar in front than rear, to make it level?