this above bag is designed for bike friday and it mention you can wheel the bike even when it is cover. would this also work for like the mini downtube. for ppl that don't know...u can wheel the mini once it is folded with the seat post up. so here are my question:
1. is this bag compatible with the mini downtube?
2. are there any other similar bag out there that are cheaper than this one? links would be great.