This relates to yesterday's post, but I'm also getting separate inquiries about it, so let me address it.
With the R-SYS, due to its structure, the bottom half during riding (especially along the vertical line from the ground contact point) experiences spoke heads grinding against the spoke ring inside the hub under load.
Of course, the spokes aren't assembled loosely enough to rattle, but there's definitely contact friction occurring—enough to leave scuff marks on the contact surface.
Since this is metal-to-metal (aluminum) contact, it's more than enough to cause noise.
The fact that the manufacturer has applied what looks like Kevlar-like fabric around the spoke head neck suggests they're aware of the phenomenon where spokes can be pulled inward toward the hub interior.
↑That blue material between the spoke head and hub shell is the "Kevlar-like fabric."
Thanks to this, there shouldn't be any noise between the spoke head and hub shell itself.
Even when you tighten the nipples more on an R-SYS, it doesn't really affect overall stiffness much.
However, tightening the nipples should reduce the amount that the spoke head is pulled into the hub when buckling forces act on the spoke during riding.
Combined with that, applying grease to the contact surface with the spoke ring will eliminate or reduce the noise.
At least, that's been my experience.
Yesterday's R-SYS wasn't brought in specifically for noise issues, so I didn't deliberately over-tighten the nipples
（I did true it, making adjustments mainly in the direction of light tightening）
but I did apply grease to the contact points.
This symptom occurs frequently enough that you could say "structurally, noise is unavoidable, and an R-SYS that isn't currently noisy is just one that hasn't started yet,"
so if you're having trouble with this, please try this solution.
With the R-SYS, due to its structure, the bottom half during riding (especially along the vertical line from the ground contact point) experiences spoke heads grinding against the spoke ring inside the hub under load.
Of course, the spokes aren't assembled loosely enough to rattle, but there's definitely contact friction occurring—enough to leave scuff marks on the contact surface.
Since this is metal-to-metal (aluminum) contact, it's more than enough to cause noise.
The fact that the manufacturer has applied what looks like Kevlar-like fabric around the spoke head neck suggests they're aware of the phenomenon where spokes can be pulled inward toward the hub interior.
↑That blue material between the spoke head and hub shell is the "Kevlar-like fabric."
Thanks to this, there shouldn't be any noise between the spoke head and hub shell itself.
Even when you tighten the nipples more on an R-SYS, it doesn't really affect overall stiffness much.
However, tightening the nipples should reduce the amount that the spoke head is pulled into the hub when buckling forces act on the spoke during riding.
Combined with that, applying grease to the contact surface with the spoke ring will eliminate or reduce the noise.
At least, that's been my experience.
Yesterday's R-SYS wasn't brought in specifically for noise issues, so I didn't deliberately over-tighten the nipples
（I did true it, making adjustments mainly in the direction of light tightening）
but I did apply grease to the contact points.
This symptom occurs frequently enough that you could say "structurally, noise is unavoidable, and an R-SYS that isn't currently noisy is just one that hasn't started yet,"
so if you're having trouble with this, please try this solution.