New, never mounted. Standard 6-bolt disc mounting; not tubeless compatible (TPU inner tubes are more suitable for enthusiasts).

"The Metron 55 is the Vision wheelset designed for aerodynamic competition. With the Metron 55, you won't be able to do without it after trying it. This model sits in the middle of Vision's Metron rim range and offers the greatest versatility in the series."

55mm section full carbon clincher rim
PRA hubs with DP spokes
Standard 6-bolt disc mounting
6 sealed cartridge bearings
2:1 aero spokes
ABS self-locking nipples
Artisanally made, entirely by hand
For Shimano HG ...