What's new
By:
Ram Heavy Duty Forum

Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!

BFG HD Terrain Tires on 2020 RAM 2500

H

HDRAM405

Member
Messages
17
Reaction score
29
Points
13
Just installed a set of BFG HD Terrain tires on my truck. So far I really like them. They are on 18" x 9 Method wheels. 305/70/18. They are a little pricey at $505 a tire. I had tried BFG KO2 all terrains on my 2018 ram 2500 diesel and could never get them to balance and they always had a shimmy in the steering wheel. I changed them to Toyo's and the problem disappeared. I had been reluctant to try BFG tires again after that. Seeing the new BFG HD Terrain tires it seems that they addressed the problem with a new tire. I also did see they are coming out with a KO3 All terrain tire later this year.
IMG_7751.jpg
 
How tall are those tires? Do you have a stock suspension? What offset are the wheels? I think a 305 is about the same as a 33".
 
They are really proud of them at that price! For 200$ less per tire i get my 3 peak rated duratracs! If they get decent tread life that may make the price better but not great!

Hopefully they do well
 
2.75 thuren front coils. 18x9 method wheels.
Works out to just shy of a 35” tire. I think 34.8 or 34.9
 
BigBob said:
Aspect ratio. A 305 70 on a 15" wheel it's a tad over 33"
Click to expand...
No it is ONLY the width in MM…. The next would be the height in a percentage of the width (70 as used in your example)


305 can be many different height’s depending on percentage and wheel diam
 
for example; 305 mm max section width ~ 12"
the 70 is percentage of width in height; 12" times 70% = 8.4"
so top 8.4" plus 18" wheel plus bottom 8.4" = 34.8" diameter
By the way most tires are a bit short of the specs, so a 35x12.5 might be from 34.5 to 35" tall... just my $0.05 if you want to learn how to calculate tire diameters... 305/70r18, the 'r' is for Radial
 
I have 325/60/20 BFG KO2 all terrains on my 2500 Mega and they shook a bit. Popped the bead and threw in a 6 ounce bag of balance beads and SMOOOOOTH now.
 
H3LZSN1P3R said:
No it is ONLY the width in MM…. The next would be the height in a percentage of the width (70 as used in your example)


305 can be many different height’s depending on percentage and wheel diam
Click to expand...
Correct. But many times the actual measurement can be off quite a bit. I do the Jeep thing. Lots of 305/70/15 tires are like 33.5" tall. Lots of tire companies sell tires that use both measuring methods. I.E., 35X12:50X18or a 305/70/18. I've yet to see a "35" that is 35" tall. But close enough.
LOL, Remember the E,F,G,H size ratings? I'm old.
 
BigBob said:
Correct. But many times the actual measurement can be off quite a bit. I do the Jeep thing. Lots of 305/70/15 tires are like 33.5" tall. Lots of tire companies sell tires that use both measuring methods. I.E., 35X12:50X18or a 305/70/18. I've yet to see a "35" that is 35" tall. But close enough.
LOL, Remember the E,F,G,H size ratings? I'm old.
Click to expand...
Those ratings are still around but the “load index” is taking over unfortunately. I have seen a few 35s that are 35” but its not common
 
BigBob said:
Correct. But many times the actual measurement can be off quite a bit. I do the Jeep thing. Lots of 305/70/15 tires are like 33.5" tall. Lots of tire companies sell tires that use both measuring methods. I.E., 35X12:50X18or a 305/70/18. I've yet to see a "35" that is 35" tall. But close enough.
LOL, Remember the E,F,G,H size ratings? I'm old.
Click to expand...
Like H78-14 ? ... nope !
 
H3LZSN1P3R said:
Those ratings are still around but the “load index” is taking over unfortunately. I have seen a few 35s that are 35” but its not common
Click to expand...
NOT load ratings, those were tire widths! Load ranges are A,B,C,D,E,F.... each letter increments by 2 ply ratings; 2,4,6,8,10,12.... So a Load Range E is a 10 ply RATING (steel belted radials have much less layers or plies than the old bias ply tires)
 
johanh13 said:
NOT load ratings, those were tire widths! Load ranges are A,B,C,D,E,F.... each letter increments by 2 ply ratings; 2,4,6,8,10,12.... So a Load Range E is a 10 ply RATING (steel belted radials have much less layers or plies than the old bias ply tires)
Click to expand...
There were never widths here by letter that i have ever heard of
 
I was looking at these tires. I currenlt have Cooper AT3 XLT, and they are okay... Very stiff, and not great in slush snow, they are very quiet which is nice. But looking at the spec, the XLT are a fairly heavy tire

How are these tires? What have you seen with your fuel economy? Hand calculated with the XLT im getting 16-19 highway.
 
H3LZSN1P3R said:
There were never widths here by letter that i have ever heard of
Click to expand...
LOL You are too young. Back in the later part of the 60's they had letters for the tire ratio, I.E. G60 15, H50 15, I think they went up as high as H but not sure. I have G60 15's on the rear of my El Camino. Pretty wide tire. Once radial tires finally came out in mass that letter stuff went away. In the old days they had few choices for tires. You could go into a tire shop and get a Goodyear 8.25 14 tire and size it next to a Firestone 8.25 14 (yes, most cars used 14" wheels back then) and the height could be very different. In 1974 I bought a W100 Power Wagon. At that time very few off road tires were available. But around that time Armstrong came out with a 11:00 X 15 bias play tire called the Tru-Trac that was great. They varied in height by what air pressure you put in them. @ 35 psi they were tall tires. @ 15 psi they were shorter sand tires. They were the cats meow at that time. I loved them.
1714261801561.jpeg
 
You must log in or register to reply here.
Back
Top