Tire conversion

[mattyj858]

i spoke with a tire guy who said the tire size conversion from a 8 x 17.5 would be a 215/70/17.5 load G. Is this correct for a 73 brave 20. It doesn't appear to be split rims, no apparent split in the rim and tubeless tires.
At this point he only has 4 and considering replacing all four in the rear and waiting for the fronts, any issue running radials in the rear and nylon up front?
Hope this works as he has a set of 4 installed for $200

[legomybago]

Don't mix and match Bias ply tires with Radials....You'll create a crab walk effect when going down the road. I did this once when I was a poor kid trying to save money...wait still am Hm?  I put a cheap used set of bias tires on the rear of my 1968 ford f250. I still had the radials on the front, the truck drove like crap on the highway.

[mattyj858]

Thanks had a feeling about that. I'll wait for all 6 tires


Does anyone know if the 215/70/17.5 is the right conversion for 8x17.5 ?

[brians1969]

Here's a calculator to play with:

https://tiresize.com/comparison/

They also have "tire size converter" and "tire height calculator" for you to click on.

[mattyj858]

Thanks couldn't seem to get info on 17.5" rim???

[mattyj858]

Hi guys, anyone have experience using 215/75/17.5 on the Dodge Rm350 8 lug?
I have a connection for all 6 tires for a screaming deal. 90% + tread on all 6, $300 installed. these are load G


I hear there might be a bead issue?


Will the ther be enough space between the rear dully? Someone mentioned a "kissing issue"


Any info is greatly appreciated, and hope these work!

[Froggy1936]

If you find they are the correct size make sure you ck the production date,  Time marches on & 7 years is the useable life of the tire even if never used !  W% Frank

[mattyj858]

If you find they are the correct size make sure you ck the production date,  Time marches on & 7 years is the useable life of the tire even if never used !  W% Frank

I am hoping someone has experience on this size, I don't want to take a gamble and find out they rub or worse stuck on the side of the road.

[Gus79Chieftain]

I just had 215 75 17.5 put on my 79 Cheiftain....new ones and they work great.

[mattyj858]

Awesome! I did make a mistake and confirmed I have a 300 chassis.
The price I found is too hard to turn down. I think I'll bring the rig in this week.

[mattyj858]

Hey guys, I put 215/75/17.5 on my 73 Brave 20 ( not split rims) today with no issues. Man big difference from the bias ply 8 17.5r

[Jonbbrew]

Never shopped for truck tires like these Rv load ones. So is it safe to assume we all have to buy $1500 worth of tires to only last us 7 years?


Or is there some sort of be for that has screaming deals?

[mattyj858]

I think I got really lucky I scoured craigslist and found 2 year old tires based on the DOT dating for $300 installed.

[Rickf1985]

Look at the Samson tires if they have them in your size. Good prices and no complaints from any of us who are using them.

[Licksquidink1]

Looking to substitute 215/75/17.5 for the original 8.0 x 17.5  for the duallys. My research says  215's are 8.46 wide. Will the rub against each other? It's a 1978 Brave, not split rims.