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wsimpson

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Wallace
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WA
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Rivian R1S
I am in the Seattle area and would love to see one of these as well. Looks like it solves a lot of problems for me.
 

1civilengr

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Chris
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Lynchburg VA
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2025 R1T MAX Pack, Honda Prologue EV
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Retired Civil Engineer
Clubs
 
I've had mine since last fall, and it has been fantastic! We do a lot of camping, and it is great to have an enclosed bed to carry all the stuff we bring along. I got the tool box option on one side, and that makes for a really convenient place for my tools and set up supplies!
Assembly is a bit tricky - like an IKEA kit, but with sketchy instructions. I was able to assemble and mount by myself (with a tractor to lift onto the bed) in about 4 hours.
 

XtrovertTwins

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Nel
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United States
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2024 R1T
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QA Consultant
Finally got around to designing some mounting brackets to utilize the Mars Accessory Adapters to mount the topper and get them fabricated. Absolutely rock solid. A bit tricky to install with the storage boxes since you can't easily see the adapters to align the bolts, but with enough patience I got all four brackets mounted. If anyone is interested, I can order more and have them shipped directly to you. Just let me know. Price would be dependent on exact material thickness and finish.

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The mounting brackets look great. Will it work with the Weistec adapters? How much?
 

flyingdock

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West Virginia
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Chevy Bolt EV
Finally got around to designing some mounting brackets to utilize the Mars Accessory Adapters to mount the topper and get them fabricated. Absolutely rock solid. A bit tricky to install with the storage boxes since you can't easily see the adapters to align the bolts, but with enough patience I got all four brackets mounted. If anyone is interested, I can order more and have them shipped directly to you. Just let me know. Price would be dependent on exact material thickness and finish.

PXL_20260603_224752212.RAW-01.webp


PXL_20260603_230325940.RAW-01.webp


PXL_20260603_230321522.RAW-01.webp
Looks great! I’d like to order a set. If you’re happy with yours I’d just copy the same setup.
 

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stefprez

Active Member
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Superior, CO
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2023 R1T PDM Max Pack w/ 20" Dark All-Terrain
The mounting brackets look great. Will it work with the Weistec adapters? How much?
I don't have the Weistec adapters myself, but I think the answer is no. Weistec list that they use M10 bolts, whereas the Mars adapters use M8. Weistec doesn't list their center to center bolt spacing either.

The mounting plates I made are about $135 total for four plates as is (0.250" thick with texture black powder coat finish). Going with a thinner material and/or omitting the powder coating can reduce price. Final price is dependent on exact taxes and shipping.
 

stefprez

Active Member
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Superior, CO
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2023 R1T PDM Max Pack w/ 20" Dark All-Terrain
Looks great! I’d like to order a set. If you’re happy with yours I’d just copy the same setup.
Shoot me a DM if you'd like a set and I can get your shipping info and we can work out payment. Happy to get a set sent your way!
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