It's Biopace, not Biospace! For the longest time I thought these Q-Ring competitors were called Shimano Biospace! No wonder I couldn't find information on them. Unfortunately Biopace is still a tough find.
The chainrings came in the mail today! I bought a couple 40t and 42t rings from Zach at BROL and can't wait to install them, but one problem - don't really know how. I guess there's only 5 options (5 holes in the chain ring to choose from).
I'll give it a try in the morning and go for some test runs.
3 days ago