Thread: Vintage Trek serial number?
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Old 09-01-17, 06:58 AM
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JohnDThompson 
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Originally Posted by Lakerat
I'm quite confident it is a 750 but the serial number date of 1978 and the A prefix don't fit in with the normal serial number pattern. Is it possible a 750 was made in 1978? My understanding is that the 750 was designed by Tim Isaak and he wasn't hired until 1979 according to the Trek timeline.
No. The 750/950 series frames were the first to use investment cast bottom bracket shells and UF dropouts, and they didn't start production until 1981. The 1970s production used Nikko bulge-formed bottom bracket shells and Campagnolo 1010 dropouts.
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