Durability/stiffness of Powertap G3 build - 24H vs. 28H

[savechief]

I'm thinking about building up a Powertap G3 rear wheel laced to some nice aluminum rims like a HED Belgium or Aforce. For durability and possibly stiffness reasons, my initial thought was 28H laced 2X both sides. Problem is, I would have to buy a new Powertap hub, whereas I already own a 24H Powertap G3. Would there be a significant durability/stiffness increase going from 24H to 28H, or are there ways that I could have the 24H wheel built (thicker spokes on the DS, for example) that would compensate somewhat?

Thanks.

[jwj410]

Maybe you can build the 24h with 3X lacing both sides?


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[savechief]

Forgot to add that I weigh about 74kg.

[FIJIGabe]

You can't lace 24h on a 3x arrangement (or at least, from what I've read online, you shouldn't). 24h should be plenty stiff, especially if laced in a 2x arrangement, both DS and NDS. I have a set of 24h CX wheels, and they're solid after 3 seasons of CX training (and I weight about 100kg).

[mpulsiv]

For stiffness, durability and longevity, 28 spokes CX-Ray hands down. I even recommend 28 spokes for lighter riders.

[pdlpsher1]

The Hed Belgium plus is a stiff rim. That would help somewhat as a stiff rim is distribute the stresses over more spokes as compared to a less stiff rim. And in theory a stiffer rim will allow a higher spoke tension. Perhaps a heavier spoke along with higher spoke tension will help somewhat. With that being said 28 spokes will likely give you less troubles.

[DutchMountains]

The geometry of the PowerTap hub isn't the best, from what I recall the NDS tension is 44% of the DS. Using an asymmetric rim will help to even this a little and maybe using thinner spokes on the NDS will help too (I used Sapim Race on DS and D-Light on NDS).

Whether 24h is enough is difficult to say for me; The PowerTap wheel set I built has 28h (got a used PT cheaply) but I also have a 24h disc wheel set. Both use Kinlin XR31 (asymmetric) rims and are fine after 5000+km. But I should say I weigh 60kg, am a spinner not a masher and I don't do sprints. So wheels have it easy with me