Ok I have a great shape 89' 14 speed peugeot triathlon bike
I recently wrecked my wheels (Velotech by Mavic with shimano 105 hubs) and cannot find ones like it so i went out and bought a set of American classic 420 Aero wheels.
Instead of keeping with the 7-speed cassette, i was thinking of upgrading to a 8 or 9-speed and buying what i need to upgrade if it isn't too much. I wanted to stick with Shimano 105 and don't mind buying used to save on the $$. Plus my bike also runs downtube shifters and want to keep it as a downtube shifting bike. I would only need to buy one shifter because it would only affect my rear derailleur. So to my understanding this should be right other than buying a new cable
8/9 speed downtube shifter (i would like to find a shimano one)
8/9 speed shimano 105 rear derailleur
8/9 speed cassette
is this correct on what i would need?
ps. yes i know there is an axle size difference and i am fine with spreading the rear forks wider to support my new wheelset.