For Shimano 8-11 Speed Bike Round Oval Narrow Wide Chainring 104bcd 30-42T Crank | eBay
GARBARUK Kettenblatt Round Direct Mount | 1-fach narrow-wide Shimano , 64,50 €
Amazon.com : M-Wave Unisex Adult PD-R4-S-NW E-Bike Chain Ring for 1/2 x 3/32 & 11/128 Inch Chains for Brose, Bosch, Shimano, Bolt Circle 104 mm, Black, 20 x 20 x 1 cm :
GARBARUK Chainring Round Direct Mount | 1-speed narrow-wide Shimano M, 54,50 €