I own two of the 80s vintage Specialized Sirrus bikes. One has been left original the other has been upgraded to Ultegra 9 speed brifters. They are fine riding bikes. I'm still using the original saddle on one, but I'm sure yours will appreciate the birthday gift.
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A conclusion is the place where you got tired of thinking. - S. Wright
Favorite rides in the stable: Indy Fab CJ Ti - Colnago MXL - S-Works Roubaix - Habanero Team Issue - Jamis Eclipse carbon/831