Well, I definetly want to check out the tunnels some time. Might be a good idea to go there with a group of riders son one can go first and radio the others if there is any traffic coming from the other direction.

As for the October holidays: My GF and I would have time from 1st to the 5th. We are not really happy about the thought of riding two up for the whole time so I am thinking of borrowing/renting an additional bike for these 5 days. Anybody has any idea where to borrow/rent bikes in Beijing (no ChangJiangs, please!)?