Bottom Bracket Compatability

[kruncher]

I am currently using Shimano 105 standard crankset, with 52-39 chainrings. I would like to change to a Shimano FC-R700 compact crankset with 50-34 chainrings. Could I use the current Bottom bracket on the bike or must I change to a BB compatible to the R700 ?

[alienator]

I am currently using Shimano 105 standard crankset, with 52-39 chainrings. I would like to change to a Shimano FC-R700 compact crankset with 50-34 chainrings. Could I use the current Bottom bracket on the bike or must I change to a BB compatible to the R700 ?

You can use the same BB.