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cheftim

Bourne, MA

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Posted: 02/22/21 05:18am Link  |  Quote  |  Print  |  Notify Moderator

Well,

Given that the 19.5's aren't going to work on the beach, I cancelled the order and I'm back to the drawing board.

I wanted to go that route for some extra safety but the #4080 option does still give me at least #500 headroom when fully loaded.

I definitely want to upgrade the wheels from the OEM. I've looked at the Methods and the American Force.

Near as I can tell the stock rims are 8"x18" with an offset of +40mm (taken from wheel-size.com) for my LT275/70R18 OEMs.

The Method MR305 NV HD are and 18"x9" with an +18mm offset with 5.7" spacing.

From what I've gathered in research:

An 9" rim with +18 offset means the mounting surface of the rim is about .7" into the front half of the wheel. That means back spacing would be 4.5 + .7 = 5.2". That's a .5" off from the spec.

Any flaws in my logic so far?

I can't find the spacing value for the current OEM rims so I don't know how to reason about the 5.75" spacing on the Methods but I'll try my math again.

I'm guessing at the OEM back spacing to be:

An 8" rim with +40 offset means the mounting surface of the rim is about 1.6" into the front half of the wheel. So the backspacing would be 4 + 1.6 = 5.6".

It seems like these rims would work and not cause an spacing issues in the wheel well.

Thanks again for all of the help.


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billtex

RI

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Posted: 02/22/21 05:47am Link  |  Quote  |  Print  |  Notify Moderator

cheftim wrote:

Well,

Given that the 19.5's aren't going to work on the beach, I cancelled the order and I'm back to the drawing board.

I wanted to go that route for some extra safety but the #4080 option does still give me at least #500 headroom when fully loaded.

I definitely want to upgrade the wheels from the OEM. I've looked at the Methods and the American Force.

Near as I can tell the stock rims are 8"x18" with an offset of +40mm (taken from wheel-size.com) for my LT275/70R18 OEMs.

The Method MR305 NV HD are and 18"x9" with an +18mm offset with 5.7" spacing.

From what I've gathered in research:

An 9" rim with +18 offset means the mounting surface of the rim is about .7" into the front half of the wheel. That means back spacing would be 4.5 + .7 = 5.2". That's a .5" off from the spec.

Any flaws in my logic so far?

I can't find the spacing value for the current OEM rims so I don't know how to reason about the 5.75" spacing on the Methods but I'll try my math again.

I'm guessing at the OEM back spacing to be:

An 8" rim with +40 offset means the mounting surface of the rim is about 1.6" into the front half of the wheel. So the backspacing would be 4 + 1.6 = 5.6".

It seems like these rims would work and not cause an spacing issues in the wheel well.

Thanks again for all of the help.

OE steelies are a great choice too. Should be rated higher than OE aluminum wheels.


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Grit dog

Black Diamond, WA

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Posted: 02/22/21 08:26am Link  |  Quote  |  Print  |  Notify Moderator

billtex wrote:


OE steelies are a great choice too. Should be rated higher than OE aluminum wheels.


Agree, however I haven't seen a higher "rating" on them, but finding OE rim load ratings is a challenge at best most of the time.

OP, I didn't calc your numbers but the theory is right. 9" wide +18 offsets is a mild offset/width change and you shouldn't expect any issues.


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jimh425

Western MT

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Posted: 02/22/21 08:39am Link  |  Quote  |  Print  |  Notify Moderator

I wouldn’t assume that OEM steel rims are higher rated. I think you are making the right call to go with 18s.

As far as offset goes, the 19.5 Visions I had were offset a bit compared to OEM. I didn’t find it to be an issue to have a slightly wider stance. Also, that would allow you to go wider/better for the beach without rubbing. I think that would be advantageous.


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cheftim

Bourne, MA

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Posted: 02/22/21 12:06pm Link  |  Quote  |  Print  |  Notify Moderator

And finally for tires, Toyo Open Country A/T II LT295/70R18.

1" larger in diameter than the OEMs.

Any final things I should consider?

billtex

RI

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Posted: 02/22/21 12:08pm Link  |  Quote  |  Print  |  Notify Moderator

Hey cheftim,

Just noticed you are right down the road from us.

Is that a SRW? No duallys allowed on the beach down the Cape.

And you def don’t want 19.5’ for running the beaches there. We air down to 18psi-20psi at Nauset.
Did you get a beach pass for this year?

Let me know if you need help setting up your rig we can meet up.

Good luck,

Bill

billtex

RI

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Posted: 02/22/21 01:48pm Link  |  Quote  |  Print  |  Notify Moderator

cheftim wrote:

And finally for tires, Toyo Open Country A/T II LT295/70R18.

1" larger in diameter than the OEMs.

Any final things I should consider?


Buy 5.

Grit dog

Black Diamond, WA

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Posted: 02/22/21 02:20pm Link  |  Quote  |  Print  |  Notify Moderator

billtex wrote:

cheftim wrote:

And finally for tires, Toyo Open Country A/T II LT295/70R18.

1" larger in diameter than the OEMs.

Any final things I should consider?


Buy 5.


Chieftim, that's about the ultimate tire/wheel setup, IMO. Good to go there.

But I absolutely wouldn't waste the money on a matching spare tire setup for a setup as close to OE in size and capacity as you are.
Your OEM wheels and tires already would haul the camper fine, and especially so in a pinch (flat tire).
Little difference in diameter won't hurt a thing, even on the rear wheel loaded.

ticki2

NH

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Joined: 07/09/2008

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Posted: 02/22/21 02:55pm Link  |  Quote  |  Print  |  Notify Moderator

billtex wrote:

Hey cheftim,

Just noticed you are right down the road from us.

Is that a SRW? No duallys allowed on the beach down the Cape.

And you def don’t want 19.5’ for running the beaches there. We air down to 18psi-20psi at Nauset.
Did you get a beach pass for this year?

Let me know if you need help setting up your rig we can meet up.

Good luck,

Bill


I thought they started allowing DRW a few years ago . Could be wrong


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Bradymydog

Western MA

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Posted: 02/22/21 03:08pm Link  |  Quote  |  Print  |  Notify Moderator

I stayed with the 18" also, 295/70/18 Cooper AT3 XLT 4080 vs stock 265/70/18 @ 3525. I really like them very quiet on the road, (I don't run them in the winter) so so in mud as they load up.
I'm at the opposite end of the state.

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