Shimano GRX FC RX 820 chainring, 12x2-speed, 110mm bolt circle, asymmetrical, 48 teeth
The GRX 2-speed chainrings are perfectly matched to the GRX 48-31 tooth configuration. Due to the asymmetrical 80 mm bolt circle with internal bolt fastening, these chainrings are only compatible with GRX cranks.
Herstellerinformation: SHIMANO INC., 3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan, www.shimano.com | EU contact: Shimano Europe BV, High Tech Campus 92, 5656 AG Eindhoven, The Netherlands, www.shimano.com