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Old 11-28-2018, 08:10 AM   #1
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36LA - 24K chassis vs 26K chassis

I have been looking for a used (2016 or 2017) Allegro Open Road 36LA that has the heavier chassis (26K). I am finding that most of those units were optioned for the 24K chassis. Is there a difference between the two in the way the coach handles and riding comfort? I noticed the Newmar Canyon Stars are all built on the 26K, and that might be my only other choice. (Plus the 3953 has 4 slides, much bigger living room)
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Old 11-28-2018, 04:35 PM   #2
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Not sure about the ride, since the difference is only the rear springs. You could conceivably swap in the heavier springs. The frame, etc. is the same. The issue I found was the 24K chassis with the 36LA didnít provide us enough carrying capacity.
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Old 11-28-2018, 05:44 PM   #3
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Not sure about the ride, since the difference is only the rear springs. You could conceivably swap in the heavier springs. The frame, etc. is the same. The issue I found was the 24K chassis with the 36LA didnít provide us enough carrying capacity.
I have a 2018 36la which came on a 24k chassis. The problem was wbile thefe was 2,300 lbs or so of ccc, i could not shift enough weight to the front axle. So i was about 1k lbs under on the front axle and about 1k over on the rear - while under 24k in total. I took the mh to a truck spring shop wbich added another leaf to the rear to bring that axle up to 17,500 lbs (an increase of 2k lbs) like the 26k chassis.
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Old 11-29-2018, 05:06 AM   #4
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I have a 2018 36la which came on a 24k chassis. The problem was wbile thefe was 2,300 lbs or so of ccc, i could not shift enough weight to the front axle. So i was about 1k lbs under on the front axle and about 1k over on the rear - while under 24k in total. I took the mh to a truck spring shop wbich added another leaf to the rear to bring that axle up to 17,500 lbs (an increase of 2k lbs) like the 26k chassis.

Curious, if you don't mine me asking, what the cost was for the additional spring? Tiffin gets $3,625 for the 26K chassis option so modifying the 24K chassis might actually be a cost effective alternative.
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Old 11-29-2018, 05:41 AM   #5
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Curious, if you don't mine me asking, what the cost was for the additional spring? Tiffin gets $3,625 for the 26K chassis option so modifying the 24K chassis might actually be a cost effective alternative.
If i remember correctly, the cost in the washington dc area this summer was around $1,300 - 1,400.

That said, if possible i would try to find a coach which was built on the 26k chassis if possible, especially if buying used where will probably not raise the price. It will keep all your weight stickers correct, etc.

The specs i found were:
24k chassis - front GAWR - 9,000
Rear GAWR - 15,500
GVWR - 24,000
GCWR - 30,000

26k chassis - Front GAWR- 9,000
Rear GAWR - 17,500
GVWR - 26,000
GCWR - 30,000

2018 f53 chassis
- 26k chassis Rear Spring deflection rate 1,850 lbs per inch / spring

-24k chassis rear spring deflection rate 1,700 lbs per inch / spring

26k Springs - 4 leafs, 64 inch long, 4 inch wide
3.31 inch total thickness without spacer

Unlike the oem 4 leafs, i now have 5 leafs on each side in the rear which increased the height by about 1/2".

While in red bay, I have attempted to measure my total spring height against a 24k and 26k chassis and believe my height is the same as the 26k and about 1/2" more than the 24k.

I did call ford to confirm that the springs were the only difference.
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Old 11-30-2018, 07:30 PM   #6
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Just remember that if you have the 26K chassis, your GCWR is still 30K. So if you use the full weight carrying capability of the chassis, you then have to keep to a weight of 4,000 lbs. or less with your towed vehicle so that you don't exceed your 30K GCWR rating. Same would be true if you add helper springs to the rear axle to bring the rear axle load carrying capability up to it's full 17,500 lbs. rating.
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Old 12-01-2018, 04:21 PM   #7
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So is there any appreciable difference in ride/handling from the 24,000 26,000 pound Chassis?
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Old 12-02-2018, 07:34 AM   #8
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My 34PA was built on the 24K chassis. I had helper springs added to the rear leaf springs for 2000 lbs increased load capability. So specifically addressing your question on my particular configuration, when not loaded it's a little more"bouncy" in the rear, but just slightly so. Under normal travel loading, I don't notice any difference. Without the helper springs I was consistently at the 15.5K weight limit of the rear axle. That limit is strictly rear springs related. With the helper springs I know I now have margin even If I don't have an "official" 26K chassis.
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Old 12-02-2018, 11:56 PM   #9
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Do Sumo Springs count towards helper springs? I have a 24k chassis but I do have Sumo Springs. I wouldn't run it all the way to 26k but it would be nice to know I could go over by 500 to 800 lbs.
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