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Old 10-14-2017, 03:03 PM   #1
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Newmar's use of non-stock F-53 Wheelbases

This site shows the 2018 F-53 specs and stock wheelbases:

2018 StrippedChassis Fleet Specifications | fleet.ford.com

They are: 158" / 178" / 190" / 208" / 228" / 242" / 252"

A quick check of several manufactures shows they are happy with these lengths.

Newmar Bay Star and Bay Star Sport use: 190" and 228" but also the non-stock: 172", 200", 216", 220"

Does anyone know what Newmar is doing here? Are they stretching shorter ones or cutting longer ones? Why?


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Old 10-14-2017, 03:56 PM   #2
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It's not just the Bay Star and Bay Star Sport...

The Canyon Star line (giants at up to 39'11" overall) use the top of the line 26,000lb GVWR for all floorplans in:
*Non-OEM wheelbases of 220", 260", and 266" and
*Two using the OEM 242"
https://www.newmarcorp.com/gas-motor...r/coach-specs/

As I understand, Ford has certified several makers to make substantial changes to the chassis, while maintaining structure and warranty. And driveshaft balance is a big part of that modification.
Maybe someone has seen the process on the factory tour to know if it is a stretch or bob (?).

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Old 10-14-2017, 05:43 PM   #3
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Newmar has always modified chassis my 90's Ford f-53 were extended.
The BAY STARS have been shortened because people wanted them short, when they started doing the short ones they had problems with the harness wiring being to long.
Haven't heard of any problems lately so must make wiring harness to fit now.
Thinking about it a shorter chassis, you may have gain more carrying capacity all suspension parts are for a 18,000 or 22,000 chassis.
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Old 10-14-2017, 05:59 PM   #4
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There was a thread a while back about a rough spot that could wear out the wiring harness at the point where Newmar shortened the chassis. Easy fix but something to check at the time. That would have me thinking they are shortened if not stock.

That was one of the things that got me looking at wheel bases. Longer is better but usually costs more and indicates a heavier chassis. Newmar has some of the longest in the business on their gas line of coaches. One of the reasons they work so well compared to some others who barley make 50% of overall length.
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Old 10-14-2017, 07:07 PM   #5
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I Was at the Newmar factory a couple of years ago getting some warranty repairs done to my Canyon Star and meet a tow truck driver from Morryde Suspension. He was picking up a chassis to have it extended. In my case my chassis is listed as a 242 inch wheelbase chassis. Morryde added 18 inches to the middle of the chassis to make it a 260 inch wheelbase chassis.
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Old 10-14-2017, 08:42 PM   #6
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I was going to post about Mor-Ryde earlier, but wasn't sure if Newmar used them. Lots of other manufacturers in Elkhart use them.

Ford does offer lots of wheelbases, but not all combinations of wheelbase and GVWR are available.

Mor-Ryde Chassis Division
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