HELP! Need Exact Dimensions of a 2024 HD 8' Bed for Custom Cap

Blairware · July 14, 2023

Anyone know where to find exact dimensions for a 2024 HD 3500 with long box? I need a few different measurements for custom cap I am having made for my Ultimate with a 7/31/23 build week. There is a 6 week build time for the cap so I want to get that started asap.

If someone has access to a 2024 HD 3500 with long box I'd really appreciate if you could take some measurements. I have a list of measurements from the cap manufacturer that I will send.

Thanks!

Another JR · July 14, 2023

Is the 2024 box different from the 2020-2023 box?

newdude · July 14, 2023

11 hours ago, Blairware said:

Anyone know where to find exact dimensions for a 2024 HD 3500 with long box? I need a few different measurements for custom cap I am having made for my Ultimate with a 7/31/23 build week. There is a 6 week build time for the cap so I want to get that started asap.

If someone has access to a 2024 HD 3500 with long box I'd really appreciate if you could take some measurements. I have a list of measurements from the cap manufacturer that I will send.

Thanks!

Same dimensions as 2020-2023. Find one on a lot and bring some measuring devices with you.

nitro882 · July 16, 2023

I can measure mine for you. do you want the internal dimensions at the rail, external to the edge of the bed and tailgate or both?

Edited July 16, 2023 by nitro882

Blairware · July 21, 2023

On 7/15/2023 at 9:59 PM, nitro882 said:

I can measure mine for you. do you want the internal dimensions at the rail, external to the edge of the bed and tailgate or both?

Hey nitro882, thanks for getting back to me. The custom cap has a sleeping platform that extends over the cab so I need some height measurements too. Below is their list of measurements. I will attach their photos too as some of the measurement descriptions are a bit vague. Let me know if you have any questions. Huge thanks, otherwise, I'd have to wait 6 weeks after receiving the truck to get cap.

Quote

Measurements:
1) Dimension from top of truck bed rail to highest point of cab.
2) Dimension from floor of truck bed to top of truck bed rail
3) Rear rail dimension
4) Front rail dimension (closest to cab)
5) Inside rail to inside rail (rear of truck)
6) Inside rail to Inside Rail Front (closest to cab)
7) From bed rail front / closest to the cab to the inside of the tailgate. Hook tape measure on the bed rail front in the middle.

nitro882 · July 24, 2023

On 7/21/2023 at 9:17 AM, Blairware said:

Measurements:
1) Dimension from top of truck bed rail to highest point of cab. 23 1/2" The highest point of the cab is in the center not at the stop lamp. I used a straight edge on the roof so i didn't have to try and eyeball it and measured to that highest point. To the top of the stop lamp is 1" less.
2) Dimension from floor of truck bed to top of truck bed rail. 21 1/2"
3) Rear rail dimension 4"
4) Front rail dimension (closest to cab) 4 1/2"
5) Inside rail to inside rail (rear of truck) 62 1/4"
6) Inside rail to Inside Rail Front (closest to cab) 63 3/4"
7) From bed rail front / closest to the cab to the inside of the tailgate. Hook tape measure on the bed rail front in the middle. 98 3/4"

See above for the measurements of my truck. One thing i think you may want to double check is the rail dimensions if your truck is going to be a SRW. My truck is a DRW and i think it may make a difference given that the plastic trim part numbers are different depending on DRW or SRW. I think the rest of the dimensions would be the same.