Anyone have US Mags Rambler U121s? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**MDPotter** · 03-01-2021, 12:18 PM

Anyone have these wheels on their truck? Looking at getting a set.

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**1971Stepside** · 03-01-2021, 04:55 PM

I have the 111's (grey centers)

sipper · 03-02-2021, 05:35 PM

Here's mine

**MDPotter** · 03-02-2021, 06:26 PM

Quote:

Originally Posted by sipper

Here's mine

Thanks for posting!

What color is your truck? And can you share your wheel specs (diameter, backspace) and tire size? And is your rear end the narrow or wide 12 bolt?

sipper · 03-02-2021, 07:48 PM

Fronts are 20 X 8.5 with 255/40/20s
Rears are 20 X 10 with 295/40/20s
Sorry don't remember the offset and its not on the bill of sale.

I got them from TNT Motorports.
https://www.rocketracingwheels.com/l...NT-Motorsports. They were real good at specking them out.

Color is Grabber Blue

Here' another angle for you

sipper · 03-02-2021, 07:50 PM

Rear is narrow. But I'm sure that doesn't help with out the specs.

**CMars45000** · 03-02-2021, 09:45 PM

Not installed yet, but I just received my U111s.
I got them from AZ Pro Performance here:

https://azproperformance.com/collect...nmetal-1-piece

I ordered:

Front 20x8
Rear 20x9.5

Tires are BFGoodrich G-Force Comp-2 will be in this week:

Fronts are 245/45R20
Rears are 275/40R20

Truck has a 3.5"/5" static drop

**MDPotter** · 03-02-2021, 11:46 PM

Quote:

Originally Posted by sipper

Fronts are 20 X 8.5 with 255/40/20s
Rears are 20 X 10 with 295/40/20s
Sorry don't remember the offset and its not on the bill of sale.

I got them from TNT Motorports.
https://www.rocketracingwheels.com/l...NT-Motorsports. They were real good at specking them out.

Color is Grabber Blue

Here' another angle for you

Quote:

Originally Posted by sipper

Rear is narrow. But I'm sure that doesn't help with out the specs.

Very helpful info, thank you.

How much is your truck lowered?

There is one other user I know of that painted his truck grabber blue, really cool color from Ford. Mine is voodoo blue (Toyota color), just a little darker.

sipper · 03-03-2021, 09:51 AM

Lowered 4.5" and 6"
Yea vodoo blue is a really nice color. It was on my short list.

**1971Stepside** · 03-03-2021, 10:27 AM

I don't think you can order these with a specific offset. They come as they come so to speak. You have to go to the two piece version to get custom offsets.

sipper · 03-03-2021, 11:17 AM

You can, but they have to be ordered and it. Takes a while

**MDPotter** · 03-04-2021, 11:05 AM

Quote:

Originally Posted by 1971Stepside

I don't think you can order these with a specific offset. They come as they come so to speak. You have to go to the two piece version to get custom offsets.

True, there is only one option for each width and bolt pattern.

I am chasing a shake in my truck and can't figure out what it is yet. The wheels I have now are cheap hand-me-down steelies from Jegs. I took them to Discount Tire and had them re-balance and they made it sound like steel wheels are sometimes hard to balance. It felt good after leaving the shop, but the shake is back to normal and pretty annoying right around 55mph. Had the truck aligned at a reputable shop awhile back, so that shouldn't be the issue. So I conducted an elaborate experiment yesterday and did some trading of wheels and tires with our other trucks and test drove and it felt much better, but it's hard to confirm without driving the roads I usually take. My dad never complained of any shaking when they were on his truck. Hard to believe the driveshaft is out of balance. Pinion angles seem to be in the acceptable range.

Regardless, I've been wanting to convert to 5 lug and get different wheels and tires so I'm considering the U121's.

03-01-2021, 12:18 PM	#1
MDPotter Senior Member Join Date: Aug 2018 Location: Western Colorado Posts: 1,165	Anyone have US Mags Rambler U121s? Anyone have these wheels on their truck? Looking at getting a set. __________________ 1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax

03-01-2021, 04:55 PM	#2
1971Stepside Almost Satisfied Join Date: Mar 2002 Location: Springfield, MO Posts: 2,928	Re: Anyone have US Mags Rambler U121s? I have the 111's (grey centers) __________________ 1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far."

03-02-2021, 05:35 PM	#3
sipper Registered User Join Date: Oct 2015 Location: wyoming ontario Posts: 40	Re: Anyone have US Mags Rambler U121s? Here's mine Attached Images

03-02-2021, 07:48 PM	#5
sipper Registered User Join Date: Oct 2015 Location: wyoming ontario Posts: 40	Re: Anyone have US Mags Rambler U121s? Fronts are 20 X 8.5 with 255/40/20s Rears are 20 X 10 with 295/40/20s Sorry don't remember the offset and its not on the bill of sale. I got them from TNT Motorports. https://www.rocketracingwheels.com/l...NT-Motorsports. They were real good at specking them out. Color is Grabber Blue Here' another angle for you Attached Images

03-02-2021, 07:50 PM	#6
sipper Registered User Join Date: Oct 2015 Location: wyoming ontario Posts: 40	Re: Anyone have US Mags Rambler U121s? Rear is narrow. But I'm sure that doesn't help with out the specs.

03-02-2021, 09:45 PM	#7
CMars45000 Registered User Join Date: Jul 2006 Location: Pittsburgh, PA Posts: 204	Re: Anyone have US Mags Rambler U121s? Not installed yet, but I just received my U111s. I got them from AZ Pro Performance here: https://azproperformance.com/collect...nmetal-1-piece I ordered: Front 20x8 Rear 20x9.5 Tires are BFGoodrich G-Force Comp-2 will be in this week: Fronts are 245/45R20 Rears are 275/40R20 Truck has a 3.5"/5" static drop __________________ Project Family Values Build Thread Vehicles/Projects: -1971 C10 SWB Fleetside! Gathering parts now, will begin frame-off resto soon... Pleasure in the job puts perfection in the work. -Aristotle

03-03-2021, 09:51 AM	#9
sipper Registered User Join Date: Oct 2015 Location: wyoming ontario Posts: 40	Re: Anyone have US Mags Rambler U121s? Lowered 4.5" and 6" Yea vodoo blue is a really nice color. It was on my short list.

03-03-2021, 10:27 AM	#10
1971Stepside Almost Satisfied Join Date: Mar 2002 Location: Springfield, MO Posts: 2,928	Re: Anyone have US Mags Rambler U121s? I don't think you can order these with a specific offset. They come as they come so to speak. You have to go to the two piece version to get custom offsets. __________________ 1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far."

03-03-2021, 11:17 AM	#11
sipper Registered User Join Date: Oct 2015 Location: wyoming ontario Posts: 40	Re: Anyone have US Mags Rambler U121s? You can, but they have to be ordered and it. Takes a while



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