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Radial, heads in or out?

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Old 02-20-08, 05:25 PM
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Radial, heads in or out?

I've got the American Classic Micro, the GEL280 rim and the spokes for a dedicated, radially laced, hillclimb wheel.

Heads in or out? Aesthetics aside, which for a more functional wheel?
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Old 02-20-08, 05:31 PM
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Heads out puts less stress on the flanges. Heads in makes it a little more laterally stiff. If the hub is approved for radial use then I would say heads in.
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Old 02-20-08, 05:36 PM
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Originally Posted by cavernmech View Post
Heads out puts less stress on the flanges. Heads in makes it a little more laterally stiff. If the hub is approved for radial use then I would say heads in.
Thank you, Thats what I'm after. Laterally stiff=Better for climbing.

The hub has thick flanges.

http://www.amclassic.com/micro_58.html

Regards,
Ray
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Old 02-20-08, 06:17 PM
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Heads out is also a little more aero, but all of those factors (stiffness, flange support, and aerodynamics) have minor effects. I prefer heads out for aesthetics and aerodynamics and haven't had any problems, but it's really personal for most people.
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Old 02-20-08, 06:41 PM
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FWIW, I built one radial wheel (28s) alternating heads in/heads out. To tell you the truth I can't think of a reason to do it again, but there was nothing wrong with it.
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Old 02-20-08, 06:45 PM
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HEADS OUT,it's better
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Old 02-20-08, 07:42 PM
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The wheel probably wont go much over 7 mph. It really is a dedicated hill climb wheel for just one hill that they won''t let us ride down.

I'm registered for both Mt Washington hill climbs this year.
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Old 02-20-08, 07:51 PM
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both wheels are dished on my lowracer. all 34 spoke heads are on the left sides of the 4 hub flanges.
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Old 02-20-08, 10:37 PM
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Originally Posted by Bob Barker View Post
FWIW, I built one radial wheel (28s) alternating heads in/heads out. To tell you the truth I can't think of a reason to do it again, but there was nothing wrong with it.
I imagine that would be less aero since you're increasing the overall frontal area. I see no other problem, but no benefit to make it worthwhile as you mentioned.

Originally Posted by DDYTDY View Post
The wheel probably wont go much over 7 mph. It really is a dedicated hill climb wheel for just one hill that they won''t let us ride down.

I'm registered for both Mt Washington hill climbs this year.
In that case go for the more laterally stiff for sure. If you're heavy or put out a lot of power you might actually even consider crossing it 2x. I've seen front wheels that rub the brakes when people climb on them.
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Old 02-20-08, 10:48 PM
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Heads out is not better, except for aesthetics.
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Old 02-20-08, 10:57 PM
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The only thing I can add, regarding the OP's hubs having "thick flanges" is that heads in will put more stress on the bend of the spoke, although that's not really a huge deal on a front wheel. But a thicker flange will exacerbate the bend.
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Old 02-22-08, 02:17 PM
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Hey thanks for all the input. I built it heads in.

Complete without a skewer in weighs 500 grams even. I'm going to run Vittoria Crono EVO-CS tires. The rear wheel will be a GEL280 laced to a Dura Ace 9 speed hub, 2 cross
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