I have a pretty new Shimano 105 triple crankset I'd like to put on my old Sakae 2500 frame. The Sakae is English threaded so the bb should fit fine.

Will the triple set in front cause any misalignment with the older 6-speed hub in back? Are there any other reasons (mechanically speaking) why this won't work?

My weak legs can't propel my bike and me up the hills, and I like riding in the hills. I need a granny gear.

Thanks for your insight and suggestions.

-Nik