>>1318269Those chainrings are 65T, they're custom made and they cost over a 100 dollars. They're built for recumbents with 20 inch wheels.
I solved the problem. I ordered a similar chainring with the right BCD.
I am combining it with 150mm cranks. It is generally recommended to use shorter cranks on a recumbent, as you shouldn't place too much torque. You can't use your body weight on the pedals, so if you use similar torque, you could bust your knees up. So on recumbents you have to ride with a higher cadence if you want to save your knees.
