Seen quit a bit of buzz about this frame over the forums, and it's a relief (if you can call that) to see I'm not the only one shocked by minimal clearance with the chainstays - I took my build up to the LBS three months ago when I bought the frame and the mechanic was pretty amazed by it all, which was refreshing seeing as I was driving myself crazy over it.
Currently using a Shimano 5700 bb (I believe it's 108mm - says BC1.37x24 on the side, anyone help a brother out?) with 172.5 Shimano 105 Hollowtech II cranks (48/38) and A LOT (four) of shims on both (yes, both...two per-) sides of the BB cups. It was the only way I could manage to get the crank arms to clear the chainstays. I don't see anything wrong with doing so, but I've heard a lot of "no-no's" about putting shims on the non-DS.
So, anyway, to make a long story short, the fixing bolt on the Hollowtech cranks must have not been tight enough and the crank arm fell off (non-DS, of course). I got a new fixing bolt and reattached the arm, with success, though now there is an unsettling "clickclick" every time I bear down on the crank.
I feel that this is a result from the abundance of shims, as well as tension being placed on splines that may have been damaged when the crank arm fell off. Due to this, I feel unsafe taking my bike anywhere except for the 3 mile flatland trip to work and back.
So, after reading thru these forums regarding the chainstay issue on this Nashbar X Cross frames, I went ahead and bought a Nashbar ISIS bb @ 113mm and a Nashbar CR2 compact crank @ 170mm. With four 1mm shims on either side, that makes my bb length at about 112mm, so the 113mm seems to be a good choice, and I'm bound to have good clearance with a 170mm crank as opposed to the complications experienced w/ the 172.5mm that people had been having minor success with here on the forums.
I just want to get some second opinions about whether or not this is a terrible idea and if anyone else has tried something similar with success/failure?
PS - Want to remind ya that this is simply my beater/commuter set up. I have no intention of racing or engaging in any super-strenuous riding. What is most important to me is whether or not IT WORKS, as opposed to "proper fit," which I feel is relative in most circumstances. Thanks again!