frame width - Mountain Buzz
 



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Old 10-08-2014   #1
 
Jackson, Wyoming
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frame width

60" or 66" for a 60" c-to-c raft with 20" tubes (and top chafe).
(One issue: Seems like the wider frame will concentrate the weight on the points where the crossbars contact the top of the side tubes vs. the weight being distributed along the full side rails with a 60" frame -- does this even matter?)

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Old 10-08-2014   #2
 
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There is lots of discussion on this, including a similar thread in the last few weeks... maybe exactly the same... to be brief usually folks go wider than center to center how much is personal preference (search old threads).

66" would be what I'd put on there with those two choices...

Yes you will have more weight bearing on the cross bars than the side rails, but it will redistribute out quite a bit when you load the boat (depress the tubes and spread weight to the frame rails). It will not stress the frame to do this, the most commonly discussed drawback is wear from the frame on the boat but in my experience the opposite will happen. The frame rails will wear, leaving black marks in the form of oxidized aluminum powder. Soap, water and a Mr. Clean Magic Eraser and the rubber it will look new, while the ends of the cross bars and the low pro's will show obvious wear (loss of annodization at first, then the AL itself).
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Old 10-08-2014   #3
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It is harder to center the frame if it is exactly the same as c to c. It will tend to slide one way or the other. go with the wider.
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Old 10-08-2014   #4
 
Jackson, Wyoming
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Quote:
Originally Posted by elkhaven View Post
There is lots of discussion on this, including a similar thread in the last few weeks... maybe exactly the same... to be brief usually folks go wider than center to center how much is personal preference (search old threads).
Sorry about that - I'll search -- and thanks for the brief summary!
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Old 10-08-2014   #5
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I did 68" on a 86" raft with 22" tubes single rail frame
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Old 10-08-2014   #6
 
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Quote:
Originally Posted by pinemnky13 View Post
I did 68" on a 86" raft with 22" tubes single rail frame
86-(11+11)=64" c to c, so a 68 wide frame results in 2" wide of center on each side; seems fine. My possible 66 frame on a 60 c to c results in 3" beyond center on each side. I know c to c is considered the minimum; I was wondering how far beyond c to c is still good.
Sounds from the responses here that 3" per side is still reasonable.
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Old 10-08-2014   #7
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When i ordered my raft i pulled a wireframe diagram from airemand pondered for a long time on how to build my frame. I came to that size off the drawing, ordered the materials and had the boat in my hands and built it i knew i was good. I centered the frame as what I call perfect. Enough on the tube and enough for the boat. If I was going to do double rails i would of gone 7" wider.
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Old 10-08-2014   #8
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And I'm horrible at math and all that beer drinking nonsence
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Old 10-08-2014   #9
 
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You'll be fine with the 66inch frame. If you are going NRS, then you could always have Dusty at DRL make you some NRS LoPro cross bars at whatever width you want.
http://www.drlrivergypsies.com/index.php
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Old 10-08-2014   #10
 
B.V., Colorado
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Thread jack.... (Haven't seen this question with search)
I use/bought a frame that sits wider than c to c (66" frame on 57.5" c to c raft) on my smaller raft in hopes of potentially using the same frame on longer and wider boat in the future.

Question: How 'bad' is it to to be less than the minimum frame width? 66" frame on a minimum 68" raft wouldn't be such a big deal right...right?? If strapped down appropriately?
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