Here's our Ichi Bike 11 skip tooth cog being put to use by a customer. Bob LaPiana sent us some photos of his 1941 Rollfast. He put one of our skip tooth cogs on his Sturmey Archer hub. The cog is available in both 9 and 11 teeth, exclusively from Ichi Bike. Thanks for sharing, Bob! If you'd like to share some pics with us of your Ichi parts or bikes, we'd love to see them!