It's a bummer that it won't work with front wheels. I've got bolt on rear wheel on my singlespeed, so that device is a non-starter.
It won't? I didn't see that. I like the idea but don't know how it'll all hold together after miles of bumping down the trail and getting mud and water all over/in it. If I get my hands on it and it seems like it'll hold up, I might just give it a try.