I wouldn't go SS. Actually I never rode one newer than ?1962. Except for a few cheap Asian bikes no better. ha. But OTOH I just happen to be collecting parts to upgrade a 1973 SA 3 spd tour size bike with new 650B wheels and drum brakes. I'm even starting to like the 1 piece crank and rubber pedals. The low 50 GI gear at least is good for getting the bike up to speed. I may just take it to Vietnam the next time. For sure it will fit the plane ride better.