does anyone know the reason ford got rid of the 19.5 wheels?

 

Because of the 19.5 inch tires they could only have a top speed of ?80 mph. The company responded to customer surveys indicating that buyers wanted a higher top speed so they changed to 17" wheels. There are changes also to axles and brakes. Many people are unhappy about those changes - a search of the forums will show you that. The original style of truck with the larger axles, wheels and brakes is available as a chassis cab but comes only with a 300 hp engine and you cannot get all the same options.

 

I have an '08 King Ranch F-450 and was hoping to trade for a new '12. I'm not happy with the changes they made to the truck. Same towing capacity but they basically made the 450 a 350 Tow Boss. Not nearly the same truck as the earlier models.

 

It's true it's a bit different than the 2008-2010 450's. I'd MUCH rather have the 17" wheels so I'm not computer controlled at 80mph (even though I rarely see 80) and I can find tires ANYWHERE unlike the 19.5's. The 19.5's were not as easy to find as the 17's from what I understand.

The 2011 450 has larger rotors, but the same calipers and pads as the 350. This is still an upgraded brake system. The rotors are larger to dissipate more heat.

The 2011 450 also has the wide-track front suspension standard. This isn't even an option on the 350. The turning radius is WELL worth it, and it also makes the truck look much better. The 350 DRW's look like a skinny chick with a fat a$$. Not my cup of tea.

Once you spec out a king ranch, the 450 is not much more money than a loaded 350. I have a completely loaded 2011 450 KR and am very glad I didn't settle for a 350. I was worried about the 4.30 rear gear but am very glad I have it now. I haul around a 16k+ 40ft fifth wheel so the extra gearing is welcomed. First gear is nearly useless when driving unloaded though... It's computer limited to the point I think it would be better to just start in 2nd gear.

The 4.30's also help with the braking. Higher RPM's = better exhaust braking. I can sit at 50-55mph with my trailer going down 6% and 7% grades no problem with only the E brake. Video of exhaust brake in action

Get the 450...

 

I think if anything that the '08-'10 F-450 is overbuilt, if that's possible. The 80 mph speed limit is because of the commercial grade tires. Hasn't been a problem for me. My tires are hardly showing any wear at 44,000 miles, should go another 30,000 with no problem. The 19.5 tires are used on many low-profile trucks so there's no problem getting them, they're expensive but available.

If I trade for a '12 it will either be an F-450 pickup or a 450 chassis cab with a hauler bed like Herrin Haulers-Herrin Welding Service, Inc. Truck Body Manufacturer of Heavy Duty Hauler Beds-Western Style Hauler Beds & RV Haulers this. I can probably get by with 300 hp and 650 lb/ft torque. The chassis cabs are de-rated for longevity and durability.