Ride, Wrench, Swap, Race
Join Date: Jan 2010
Location: Northern California
Bikes: Cheltenham-Pederson racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
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The STX derailers, all of them, were specifically for compact rings/cogs, meaning 28 or perhaps 30t max in back.
You will need to assure that sufficient B-tension is achieved to run a 32t cog in back, which may necessitate a longer screw or even adding a dome nut to the tip of the screw to keep the lengthened screw from slipping off of the frame dropout's hanger tab. A stiffer, 5mm diameter cable housing can actually help boost the b-tension effect as well.
Chain length needs to be from 2-4 links (1 to 2 inches) longer than full-tight (when using the biggest sprockets front and rear), and likely more if you have rear suspension (which must be compressed to the chain's tightest position when checking chain length).
Last edited by dddd; 12-28-10 at 01:03 PM.