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fatbike carbon rims, 64 hole, will they fill with water?

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fatbike carbon rims, 64 hole, will they fill with water?

Old 08-19-16, 03:57 PM
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Todd Richards
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fatbike carbon rims, 64 hole, will they fill with water?

I got a wonderful aluminum frame 1x10 fat-bike but with exceptionally heavy rims. i know i know, the whole thing is heavy why count grams? I'm really not but still I like building wheels so would like to swap the heavy existing 80mm rims for lighter carbon 80mm wide rims. The tires I have are fairly light as well and work great on the groomed snow of the snowmobile trails here in Maine.

The rear of the frame is asymmetric, so i need the carbon rims with 2 pairs of 32 holes right and left, so i can lace the spokes to the 32 on the drive side.

my question is wouldn't the remaining 32 holes accumulate water? carbon rims always seem to have a fairly substantial void in the middle, and run about 675 grames each, instead should I just get a set if Sunringle Mulfoots at 830 grams per rim? Those don't seem to have any 'middle void' area so the issue is solved.
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Old 08-19-16, 04:58 PM
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Originally Posted by Todd Richards View Post
......The rear of the frame is asymmetric, so i need the carbon rims with 2 pairs of 32 holes right and left, so i can lace the spokes to the 32 on the drive side. .........
Why ???

All rear derailleur equipped bikes have asymmetric rear wheels, usually constructed with different length spokes on centrally drilled holes. A more sophisticated wheel build uses thinner spokes on the NDS so that the stress level (force per unit cross-sectional area) is the closer to the same in the DS and NDS spokes.

You could plug the holes, or contact the manufacturer for a rim with only the holes you want to use.
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Old 08-19-16, 06:30 PM
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Holes with spoke nipples in them are hardly watertight, so I don't see that empty holes would be any different.
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Old 08-19-16, 07:02 PM
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Originally Posted by nfmisso View Post
Why ???

All rear derailleur equipped bikes have asymmetric rear wheels, usually constructed with different length spokes on centrally drilled holes. A more sophisticated wheel build uses thinner spokes on the NDS so that the stress level (force per unit cross-sectional area) is the closer to the same in the DS and NDS spokes.

You could plug the holes, or contact the manufacturer for a rim with only the holes you want to use.
It's pretty common to have two rows of drillings on fatbike rims, and only to lace up to the DS drillings -- that gives nicely-balanced spoke tensions in the end without resorting to thinner spokes or anything like that.

I agree that if spec'ing the rims from scratch, there's no reason to do the NDS drillings in the first place.
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Old 08-20-16, 08:09 AM
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Originally Posted by nfmisso View Post
Why ???

All rear derailleur equipped bikes have asymmetric rear wheels, usually constructed with different length spokes on centrally drilled holes. A more sophisticated wheel build uses thinner spokes on the NDS so that the stress level (force per unit cross-sectional area) is the closer to the same in the DS and NDS spokes.

You could plug the holes, or contact the manufacturer for a rim with only the holes you want to use.
um, i understand your statement, but honest, many fat-bikes are asymmetric spacing for the rear hub. not quite the same as just shorter spokes on the drive side as with all bikes with rear derailleurs. on my fat-bike, and many others, both drive side and non drive side spokes are laced only to the row of holes on the drive side of the rim. Some fat-bikes have very wide rear hubs that I think then allow traditional spoke patterns to the center of the rim, but not mine.

https://tse1.mm.bing.net/th?id=OIP.M...a74o0&pid=15.1

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Old 08-20-16, 08:17 AM
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https://tse1.mm.bing.net/th?id=OIP.M...a74o0&pid=15.1
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