Trek 420 - Advice on Upgrading
1985 I believe, I'm upgrading to sell, not keep, and make it more attractive in a slow market.
It does have the Helicomatic hub, 5 speed, 126mm spacing. Everything seems original, Weinmann rims, tires in remarkably good shape.
Cheapest seems to get a rear hub and 7 speed freewheel with Shimano A070 7 speed brifters. Keeping the 27" rims, tires and new spokes if needed - I've done this route before..
But I happen to have 1055 Shimano 105 8 speed brifters that I've attempted the "take apart and flush n grease" (got 'em free). The left is great but the right has a little resistance on the big lever, not great but not horrible, well greased.
Further testing is needed mounted on bars. I know this leads to a freehub and cassette that I haven't dealt with yet in working on bikes. A little wary of getting a freehub that may be 9 or 10 speed, like Tiagra 4400 and how a 8 speed cassette is going to work. I believe there's spacers involved behind the largest cog (?). But all this would make a better bike.
Of course looking for a good but reasonable cost route. Please comment with your experience in making a nice bike that someone would like to buy.
1974 Falcon 76 : 1986 Falcon 105 : 1980 Trek 614 : 1985 Ironman Master
1987 Le Mans RS : 2009 POS : 2012 Trek FX