January 12, 2020
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There are many important factors to ensure compatibility between a body and a chassis. Gross vehicle weight rating, gross axle weight rating, payload, wheelbase, fuel and DEF tank location are just a few to consider. Utilizing an experienced and professional upfitter will ensure your next purchase won’t yield an incompatible body and chassis. Regardless if you lean on your truck equipment distributor to do it all from spec’ing to installation or if you prefer to dream up your own upfit, you should always understand how the cab to axle measurement comes into play.
Use this quick guide to determine what body will fit with your next chassis.
Cab To Axle |
Service/Utility |
Platform |
Gooseneck |
Dump |
|---|---|---|---|---|
| 36″ | 7′ | 7′ | 7′ | |
| 40″ | 7′ | 7′ | 7′ | |
| 42″ | 7′ | 7′ | 7′ | |
| 56″ | 8′ | 8′ | 8′ | |
| 60″ | 9′ | 9′ | 9′ | 9′ |
| 84″ | 11′ | 10′ | 11′ | 12′ | 11′ | 11′ |
| 108″ | 13′ | 13′ | 14′ | 16′ | ||
| 120″ | 14′ | 14′ | 16′ | 18′ |
* List contains common cab to axle measurements of Ford, GM & Ram cab chassis and standard Knapheide product body lengths.
** Always use an experienced truck equipment upfitter to help determine what chassis, body and equipment are compatible and comply with all federal, state and local commercial vehicle regulations.
*** Body lengths in table are nominal length, please refer to Knapheide specification pages for exact body lengths.
