This spidering is for a directmount on Aldhu arms and spindle. It's available in 3 sizes and this one is with round chainrings.
Inner round chainring, for 110mm cranks. These NoQ chainrings are perfectly round whereas Qrings are ovalized (5%).
Outer chainring for compact cranks (110mm). Available in many sizes.
144mm diameter. Round chainring. Compatible with Rotor 3D track crank, Aldhu track crank and Vegast track crank.
Round aero chainring for Rotor 110mm cranks. Qarbon is a stiffer and lighter chainring than standard. It's the top of the brand of the chainrings.
Available in many sizes. Same quality as the famous Qrings, but round ! Compatible with Rotor 110mm cranks.
For 130mm cranks . Available in 46, 52, 53T.
Inner chainring, available in many sizes. For Rotor 130mm chainrings.
Round aero chainring for Rotor 130mm cranks.