Originally Posted by
LesterOfPuppets
I FD will definitely not be a direct transfer because LHT takes bottom pull but the BD bike has a top pull. Seatpost may or may not be cuz there are lots of sizes of those and BD doesn't list the spec on theirs.
Slight chance the BD bike has 73mm BB shell but I seriously doubt it. Should be OK there. LHT definitely has clearance for 48T chainring. Rear dropouts are 135mm on both bikes. Both take 1 1/8" headsets/forks/stems. I think that about covers all the compatibility concerns.
I wonder how many of these statements made sense to the OP. Until they all do, he needs more experience.