Ram Rebel Forum banner

1 - 10 of 10 Posts

·
Registered
Joined
·
35 Posts
Discussion Starter · #1 ·
Trying to figure out The relationship between wheel offset and chances of it rubbing with 35's on my truck

Is it better to go with a +18 mm offset rim which is stock or would a -12 mm offset. Which set up has the least amount of chance of rubbing ?

Grabbing 20" rims tomorrow so I need to know ASAP

Thanks !!
 

·
Registered
Joined
·
660 Posts
Actually, Roomraider did the "sweet spot" mod by adjusting his links, raising it slightly. He says that in a post further down that thread. Some guys have done this with 315/70r17 tires with no height mod. (Instead of 35x12.5r17.) The tires are 12.5 wide, but about 34.5" tall rather than 35". Gives 1/4" more clearance but impossible to see a difference otherwise.
 

·
Registered
Joined
·
35 Posts
Discussion Starter · #5 ·
Actually, Roomraider did the "sweet spot" mod by adjusting his links, raising it slightly. He says that in a post further down that thread. Some guys have done this with 315/70r17 tires with no height mod. (Instead of 35x12.5r17.) The tires are 12.5 wide, but about 34.5" tall rather than 35". Gives 1/4" more clearance but impossible to see a difference otherwise.

That's good to know , I was even thinking if they made a 20" tire that was 34 " overall .. Just have to find one
 

·
Registered
Joined
·
10 Posts
The -12 would put the outer edge of the wheel out further from the hub. The natural thought would be that if you are further out, you have less of a rubbing chance. However, it's not the inner edge of the tire that rubs, it's the outer edge. In actuality, if the outer edge of a wheel/tire is further from the hub, that edge experiences a longer travel distance when you turn, increasing your chances of rubbing.


I'm actually looking into this before long myself, but I do not yet know the specifics of what will work and what won't. Right now I'm thinking 315/70-R17 on stock rims may not rub even without doing anything else. But I'm hearing different results from different people, so still not sure.
 

·
Registered
Joined
·
35 Posts
Discussion Starter · #7 ·
The -12 would put the outer edge of the wheel out further from the hub. The natural thought would be that if you are further out, you have less of a rubbing chance. However, it's not the inner edge of the tire that rubs, it's the outer edge. In actuality, if the outer edge of a wheel/tire is further from the hub, that edge experiences a longer travel distance when you turn, increasing your chances of rubbing.


I'm actually looking into this before long myself, but I do not yet know the specifics of what will work and what won't. Right now I'm thinking 315/70-R17 on stock rims may not rub even without doing anything else. But I'm hearing different results from different people, so still not sure.


I set a -12 20" rim on the truck last night . It's stuck out quite a bit more over the stock . I'm saying almost an 1/ 3/4 "to 2 " inches. Also it was a 9 inch rim over stock was an 8 inch


I think I'm going to take these back get the same rim at a +18 offset, and maybe try a set of 325 / 55 / 20 or a bit taller if I can


Thanks for the info above , because I initially thought that a -12 rim have less chance of rubbing but I see now that you are correct
 

·
Registered
Joined
·
10 Posts
Wish I could take credit for a brilliant mind giving me that insight. Unfortunately, it was a hard lesson I learned a few years ago when doing mods on a Silverado, where I ended up having to cut away part of my wheel well liner. But at least now we know. I'm anxious to see how this turns out for you, as I am wanting to go to 35's without doing any suspension mods if possible.
 

·
Registered
Joined
·
660 Posts
There really doesn't seem to be any way to put actual 35x12.5s on without rubbing somewhere, from what guys in this and the other Rebel forum have posted. Everyone as far as I can tell has resorted to minor lift adjustments using link mods to gain another 1 to 2". Or else put in actual lift kits. Nice thing about the link mods is you can revert back to stock in minutes. Bad thing is the ride gets rougher. But if you were looking at larger wheels, you were already preparing for that.

Keep in mind that you might be able to go with a taller tire that isn't wider. It's a combination of the width and the height that causes the rubbing. Well, plus offset moving that around a bit. But if you were to use a slightly narrower tire you might be able to go with a full 35".

A 305mm is 12" wide. That's 1/4" off each side, not really visible difference from a few feet away. Not sure if 1/4" is enough difference, but adjusting the offset may help. You can also go 295mm, which will be 11.5" wide. There are 295/65r20s out there, including the Toyo A/T II.
 

·
Registered
Joined
·
35 Posts
Discussion Starter · #10 ·
There really doesn't seem to be any way to put actual 35x12.5s on without rubbing somewhere, from what guys in this and the other Rebel forum have posted. Everyone as far as I can tell has resorted to minor lift adjustments using link mods to gain another 1 to 2". Or else put in actual lift kits. Nice thing about the link mods is you can revert back to stock in minutes. Bad thing is the ride gets rougher. But if you were looking at larger wheels, you were already preparing for that.

Keep in mind that you might be able to go with a taller tire that isn't wider. It's a combination of the width and the height that causes the rubbing. Well, plus offset moving that around a bit. But if you were to use a slightly narrower tire you might be able to go with a full 35".

A 305mm is 12" wide. That's 1/4" off each side, not really visible difference from a few feet away. Not sure if 1/4" is enough difference, but adjusting the offset may help. You can also go 295mm, which will be 11.5" wide. There are 295/65r20s out there, including the Toyo A/T II.

I'll let you know what I end up doing. Would really like the 35's but I only want to lift the truck just enough to make them fit :)
 
1 - 10 of 10 Posts
Top