Anyone still running 24.5" wheels?

11R24.5 because big truck needs big rubber! I need the diameter due to my 3.90 rears. Truck was built during the national 55 speed limit days.

I like the better ride, looks and lower tire rotational speed. Big rubber handles more load with less air pressure is why they ride better. Check out some load/inflation tables and compare sizes and recommended inflation pressures.

Negatives are heavier weight, less core value, more expensive.

Little wheels look bad in big wheel fenders. Look at all the Pete's with 22.5s on 'em!

 

I run 24.5 lp. 3:70 rears its a little slower than I might like, but 1400 is right at 65. I'm in the northeast where both 22 sizes are common, as is 11r24.5.... But lp 24s aren't as easy to come by and tire shops know it: always seem to be a bit more $ than any other size.

 

Hey guy, what would my rpm drop if i went from 24.5lp to 24.5 Regular? At the moment im at 1400rpm doing 65mph.

 

I gained 3mph goin from 22.5lp to 22.5 tall. I assume you would be in the 68 mph range at 1400

 

I have 24.5 tall rubber and 3.90 rears, 10 speed od. 475 hp cat in a 99 379. Running heavy and oversize still average 6.7 mpg. Normally run 61 - 63 mph but on occasion will bump75 to 80 across Texas to beat a curfew. She gets thirsty when you start bumping 80. Low 5s. Have been thinking of going to 3.55s and 24.5 lp on the next tire change. Does great on hills as long as you are up to about 65. With the drop from 10th to 9th being so big if you hit the hills running 55-60 your in for a slow ride to the top.Normally don't have any trouble finding tires when needed but they are heavier and more expensive.

 

I gotta comment on this............
Today's Eaton Fuller Super 13 and 18 transmissions are NOT double overdrive transmissions! They are basically a 9 speed overdrive main transmission with an under drive splitter section. That means when the splitter button is back it is in under drive and when forward it is in direct!
E-F 13 speeds of years ago before the Super 13's and 18's were available with either an under drive or overdrive splitter section. Most common 13's were a 9 speed direct main with an overdrive splitter. You also could not preselect the splitter on these and also expect long life! The introduction of the Super 13 and 18 solved the preselect deal! An old 13 with a 9 speed overdrive main and overdrive splitter was the only true double-over transmission that was produced! The mythical 15 double over was a mechanical impossibility! Can't have two overdrive gears in one box!
Just my 2 cents!

JD

 

Agree. End result is .86 then .73 in the big hole. It has been explained to me many times that it is not a double overdrive. But the end result is .86 then .73, go figure?