https://www.bikeman.com/bicycle-repair- ... inring-bcd
5 Bolt Chainrings
Bolt CircleDiameter__________Hole to Hole Cntr to Cntr
56mm____________________32.9mm
58mm____________________34.3mm
94mm____________________55.4mm
74mm____________________43.5mm
110mm___________________64.7mm
130mm___________________76.4mm
135mm___________________79.5mm
144mm___________________84.6mm
4 Bolt Chainrings
58mm____________________41.0mm
64mm____________________45.3mm
68mm____________________48.1mm
104mm___________________73.6mm
112mm___________________79.2mm