I ordered a Calfee tandem through Hubbub Bikes in Chesterfield, OH about 4 weeks ago. I got a Calfee carbon triple tandem crankset from Mel at TandemsEast. All he has left are the 172.5mm/170mm or 170mm/170mm captain/stoker sets, no 175mm/170mm sets. Calfee does not have any cranks in stock. But, I am also getting the Gates Belt drive system installed. I have requested Hubbub to install Token Isis titanium bottom brackets with ceramic bearings, available from www.tufonorthamerica.com.