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Old 12-01-10, 10:48 AM
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AEO
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you won't be able to use an R700 compact on a frame that has a 73mm shell unless you do some modifications to the frame.
Mega EXO uses a 2-piece system that has a fixed length axle, just like shimano's R700 compact. Some cranksets have a long axle, mainly road triple and the entire MTB range, but others, like shimano's road double regular and compact have a shorter axle. When you apply the fixed axle length to the BB, shorter axles will not work on frames that require the longer length, but the longer can work on the shorter with the use of spacers.

if 68mm is the road size and 73mm is the MTB size, then the frame's BB will need to be brought down to 68mm if you want to use a road compact on it. Even then, it's not a guarantee that it will work, because there are certain chainring size limits to frames.
All in all, if you have a shop bring down the BB size to 68mm, then the R700 should work on that frame, as I see it has a 28-38-48 triple, which means a 34-50 compact will fit 99% of the time.
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