35" vs 37" Tires

[aschafer14]

Is anyone running 35" Tires and regret not going bigger. Or running 37" tires and wish they went smaller?

We just got out super singles on order are leaning towards 35's mostly due to weight, power/gearing of the vehicle and hopefully better fitment in our FG649 (trying to avoid moving the AC condenser). Our rig currently sits at 10,500 lbs dry so I was looking at the Falken Wildpeak AT4W which have a 125R load rating (3640lbs)

 

[GR8ADV]

37 all day long. Easy cruising at 65 mph (gps actual speed) at 3k rpm.

 

[gator70]

My rig got 37s on 20 inch rims. Truck is not delivered yet. The stock tire was 31. How do I adjust the speedo, or do I use a GPS device?

 

[SkiFreak]

Given that you have a FG649, I would think that 35's would be more appropriate. That truck is definitely not a powerhouse, so 37's might make going up hills a bit more painful.
Where do you plan on taking the truck? Will it mainly stay on the blacktop or fire trails, or is your intent to go on more extreme terrain?

Just because someone says this one is better than that one is not really relevant when it comes to YOUR truck.
What you intend to do with the truck needs to be taken into account in order to make the appropriate tire choice for YOUR situation.

 

[Peter_n_Margaret]

My OKA has 305/70R19.5s with a lot less power than that FG649. Yes, it is slow up hills. I live with that. The benefits outweigh the down sides. That is the diameter it was built new with, but on 16" rims.
I would consider 37s on 20" rims a poor choice. 37s on 17" rims would be far superior.
Tyres are also part of the suspension and how well they do that part of their job is about how much wall there is and 37s on 20" is reducing that too much, in my view.
Cheers,
Peter
OKA196 motorhome