interesting bike. the mismash of parts has thinking maybe it is older than '89 and the DA and 600 levers are an upgrade.
can you post a few pics of the crank, dropouts and the underside of the BB shell?
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk