From my experience riding on Unions and the new Triads, I have to admit that the Triad feels more comfortable - less jarring. While I'm not a rim designer, I would suspect that most of the "compliance" comes from the fact that the Triad is much slimmer in cross section than the Union, which allows it to flex more about the spoke nipple. If you imagine the spoke bed is fixed, the bead walls can still flex up and down a bit, relative to the spoke bed - similar to what the Zipp 3Zero Moto rims are doing.
It's subtle, but noticeable.
![zipp](https://www.sram.com/globalassets/publicsites/feature-promo-single/zipp/z_3zero_moto/3zero_moto_ankle_illustration.png?w=950&quality=80&format=webp)
Nov. 23, 2022, 2:06 p.m. - Ryan Walters
From my experience riding on Unions and the new Triads, I have to admit that the Triad feels more comfortable - less jarring. While I'm not a rim designer, I would suspect that most of the "compliance" comes from the fact that the Triad is much slimmer in cross section than the Union, which allows it to flex more about the spoke nipple. If you imagine the spoke bed is fixed, the bead walls can still flex up and down a bit, relative to the spoke bed - similar to what the Zipp 3Zero Moto rims are doing. It's subtle, but noticeable. ![zipp](https://www.sram.com/globalassets/publicsites/feature-promo-single/zipp/z_3zero_moto/3zero_moto_ankle_illustration.png?w=950&quality=80&format=webp)