Ride, Wrench, Swap, Race
Join Date: Jan 2010
Location: Northern California
Posts: 9,194
Bikes: Cheltenham-Pedersen 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.
Mentioned: 132 Post(s)
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Quoted: 1565 Post(s)
When replacing pullies, it's important that the overall width of each assembled pulley be very close to the same, since the mounting plates are effectively flat.
Someone put the wrong bushing in one of the OP's pulleys, but a suitably-thin washer (of slightly smaller OD) added to the end of the bushing might correct that at lowest cost.
Having both pulley bolts good and tight is a matter of safety in my experience.