Originally Posted by
KCT1986
There was a RX-100 triple crank, marked '-T'. This was from earlier than the OP's bike, about '92 (7 speed group). It was one of Shimano's early use of 130/74 triple for road. Followed a few years later with the FC-1057.
Thus, triples were made by Shimano. Probably not standard on OP's bike. Reason that the post before your asked OP to confirm the parts.
Point taken. Thank you.
Odd that the RX-100 version appeared before the 105SC. AFAIK they were identical except for the painted finish on the 105SC.
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