On Fri, 10 Jan 2020 10:31:40 -0800 (PST),
wrote:
On Friday, January 10, 2020 at 10:14:09 AM UTC-8, AMuzi wrote:
https://bikerumor.com/2020/01/06/pat...don-wave-tech/
-- Andrew Muzi
www.yellowjersey.org/ Open every day since 1 April, 1971

Doesn't it seem sort of silly that you would drill a million holes in
a chainring to make them as light as possible and then stick steel
magnets on them? On 1 x's I suppose the problem is going to be chain
retention what with very wide rear cog ratios nd no front derailleur
to hold them in place. But don't you think a plastic retention cage
would both work better and be lighter?

Or just taller teeth on the chainring.