107 sounds a little short, but you may get away with it with those narrow chainstays. I believe the idea with 2 cogs 2 chainrings was that you could (theoretically) switch the chain from big/small to small/big without having to reposition the rear wheel. I'm not sure how well that worked in actual practice, though. You'll be fine with a single up front if you don't mind sliding the wheel.
Also, be aware that Dos requires a 9-speed-or-narrower chain to fit between the cogs. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
