New dually, question on tires and rims - Chevy and GMC Duramax Diesel Forum
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post #1 of 12 (permalink) Old 03-20-2019, 05:53 PM Thread Starter
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New dually, question on tires and rims

Someone talk to me about dually tires and aftermarket rims. I just bought a 2019 3500 dually. Love the truck, hate the wheels and mpg. I tow my 19k goose neck horse trailer basically all over the country. What's everyone running for aftermarket wheel tire set ups. I don't want to level the truck. What fits at stock height and how is everyone making sure there is enough clearance between the two rear tires? Looking for a set up that works with the truck as is, and doesn't kill ride or mpgs.
I have been looking at three different types of wheels Fuel FF31D, Fuel FF19, or XD Grenades all 20" set ups.
Anyone have any real world experience with similar set ups towing something reasonably heavy? Probably the wrong section, but I wanted ppl with towing experience.
Thanks
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post #2 of 12 (permalink) Old 03-20-2019, 06:54 PM
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New dually, question on tires and rims

I’ve run a 20x8.25 for over 100k already. Try to find some direct bolt on 8 lug 20s, or they’ll stick out past your fenders quite a bit. The bolt ons still will a bit, but not nearly as much. I run 275/65/20s, and have plenty of clearance between the two rear tires, could go wider.

Those 100k were all towing, no issues. Stock suspension setup.


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post #3 of 12 (permalink) Old 03-21-2019, 05:22 AM Thread Starter
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Originally Posted by M.A.M. View Post
I’ve run a 20x8.25 for over 100k already. Try to find some direct bolt on 8 lug 20s, or they’ll stick out past your fenders quite a bit. The bolt ons still will a bit, but not nearly as much. I run 275/65/20s, and have plenty of clearance between the two rear tires, could go wider.

Those 100k were all towing, no issues. Stock suspension setup.


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Perfect thank you. Your truck looks great by the way. Tires and wheels look perfect.
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post #4 of 12 (permalink) Old 03-24-2019, 08:36 AM
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This "thread" has me confused. I am not aware of ANY modern medium duty truck wheel manufactured since the early 1930's that has a separate "rim". Unless there is something on the market in recent years ( other than some early World War Two "combat" wheels) in which the wheel and rim are separate ? ? ?

I remain unclear on what basis changing the wheels and/or tires GMC/Chevrolet trucks come out of the factory door with can significantly change mileage.

Can someone help me understand this ?
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post #5 of 12 (permalink) Old 03-25-2019, 08:19 AM Thread Starter
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Originally Posted by 6686L View Post
This "thread" has me confused. I am not aware of ANY modern medium duty truck wheel manufactured since the early 1930's that has a separate "rim". Unless there is something on the market in recent years ( other than some early World War Two "combat" wheels) in which the wheel and rim are separate ? ? ?

I remain unclear on what basis changing the wheels and/or tires GMC/Chevrolet trucks come out of the factory door with can significantly change mileage.

Can someone help me understand this ?
No tire/wheel combo is going to increase the mpg, but it already sucks big time (currently around 12-13 on the highway empty). So I didn't want to make it worse with larger tires.
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post #6 of 12 (permalink) Old 03-27-2019, 09:36 AM
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I think you should look at what your new truck is rated to tow with the original tire/wheel combos versus something with 20 in wheels. I know a SRW 3500 has different size tires VS a DRW 3500 due to weight ratings.
As for the mileage-- it's a big truck. I have a 2019 3500HD DRW 4X4 with a flatbed on it and I haul horse trailers as well. I get about the same as you unloaded and about 10 loaded.

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post #7 of 12 (permalink) Old 03-27-2019, 10:29 AM
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Quote:
Originally Posted by duramaxsp33d View Post
No tire/wheel combo is going to increase the mpg, but it already sucks big time (currently around 12-13 on the highway empty). So I didn't want to make it worse with larger tires.
Actually when I went to 19.5s I gained about .4 MPG on the highway. But that is easily eaten up by the decreased mileage in town.

My normal MPG in town = 13-14.
Best I ever got on the highway = 18.5

All hand calc.

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Alcoa 19.5s with Michelin XZE, Centramatics,Tow Mirrors, Chrome Grill Overlay, Rear underseat storage, Mudflaps all corners, 20% Window tint, 6" Oval Steps, B&W Turnover Hitch, B&W Companion Hitch, Sulastics, GM Campaign #PIT3009J, Wireless Console Charging, Bilstein 5100s, Raptor 3602RL
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post #8 of 12 (permalink) Old 03-27-2019, 10:44 AM
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09 GMC SLT Dually
Steel Gray Metallic
All options except sunroof

Mods so far:

Alcoa 19.5s with Michelin XZE, Centramatics,Tow Mirrors, Chrome Grill Overlay, Rear underseat storage, Mudflaps all corners, 20% Window tint, 6" Oval Steps, B&W Turnover Hitch, B&W Companion Hitch, Sulastics, GM Campaign #PIT3009J, Wireless Console Charging, Bilstein 5100s, Raptor 3602RL
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post #9 of 12 (permalink) Old 03-27-2019, 10:49 AM Thread Starter
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Originally Posted by sambor View Post
I think you should look at what your new truck is rated to tow with the original tire/wheel combos versus something with 20 in wheels. I know a SRW 3500 has different size tires VS a DRW 3500 due to weight ratings.
As for the mileage-- it's a big truck. I have a 2019 3500HD DRW 4X4 with a flatbed on it and I haul horse trailers as well. I get about the same as you unloaded and about 10 loaded.
I can deal with 10 mpg loaded, that is what my 2500 gets towing the trailer, but the empty mpg is crazy low. Maybe it will get better with more miles, only about 1200 so far?
As far as tire weight rating, the stock tires are only 3085lbs, not sure of the stock rims. The LT275/65R20 are rated 3750/3415. I forget what the rims are off hand, but were not an issue.
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post #10 of 12 (permalink) Old 03-27-2019, 12:44 PM
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New wheels make the truck, I tow my 17'000lbs camper with no issues. As posted by MAM the 275/65 R20 fits perfect with nothing else needed. Plenty of gap in the rear wheels.

I raised mine up because I like the look but my wheel and tire package fit perfect at stock height.
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2018 3500HD LTZ DRW

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