What I've always wondered about straight pull vs. J-bend spokes is the risk/benefit comparison.
The fixtures necessary to create on the straight pull hub that receive force concentrated by the head of the spoke need to be more robust than a conventional drilled hub flange. They have greater contact surface and tangential distribution of energy gained through the contact of the spokes' J-shape, particularly the outbound, against the hub flange material. The straight pull hub must transfer all energy directly by only the head of the spoke. Seems that to make the spoke head fixtures on a straight pull hub body you must ensure enough material for strength and avoid stress risers by design that a weight comparison isn't the highlight. Weight savings at the hub are much less impressive to me than those outward on the circumference. For load bearing parts the importance of experience weighs very well against garage innovations. Shimano or Campagnolo know some things about hubs institutionally and would not focus on any single aspect of a hub design unless able to address the rest of their corporate secret soup. Having lived through the CNC '90s in a bike shop I've seen lot of boutique maker parts after the fail and the wrath of owners unhappy their money didn't buy them out of being concerned for simple failure such as axle of spindle breaks. Whether from less than professional machine work, material selection or tolerances not as tight as they should have been, I saw those things come back in parts. Andy Cheatham Pittsburgh On Monday, January 16, 2023 at 6:44:42 PM UTC-5 Nick Payne wrote: > Here's pair I built myself - Newmen Fade 28h thru axle hubs, Light Bicycle > AR28 (22mm internal width) rims, Sapim CX-Ray straight pull spokes. Weight > 1380g. They've been perfectly reliable and have remained dead true in the > 18 months I've been riding them. All-up cost of the parts was about $AU900 > (~$US600). > [image: PXL_20210608_022518518.jpg] > [image: PXL_20210608_022600960.jpg] > [image: PXL_20210608_022635313.jpg] > > Nick > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/9db5870b-aa66-4c61-bf87-c52fc237e75en%40googlegroups.com.
