Wayne and Greg discussed one-bolt Super Records with allen-fitting bolt heads.
That stock 13mm head, 8mm shaft steel bolt was one of the heaviest things in a Super Record Gruppo! Certainly heavier than, say, the brake centerbolt, which was often replaced with a Ti aftermarket part back in Drillium Days. Just about from the day one-bolt SRs came out, I used to replace that bolt with the Cinelli 1R stem bolt, which is aluminum and allen-headed. The Cinelli didn't have enough threads, so I'd add threads with a die and shorten 'em. A cool thing to accompany ultralight bolt kits from FB, OMAS et al.
Please don't tell me it was silly - I know that! I don't think anyone seriously thought the ultralight thing added significantly to the joy of riding or won races. Tricking out bikes was a game of it's own, with no real goal beyond having a trick bike.
I should take a pic of the seatpost on my own #1 road bike sometime. It's a generation 1 SR, with the two bolts and the barrels they thread into replaced by some black anodized aluminum bits; FB brand I think. That wasn't enough though - I also lathe turned the shaft on a taper, such that it's 27.2 in the frame but immediately above the lug starts to get smaller. All the fluting is gone, and with it all the collectible value, but I did it in about 1979, back when those weren't so rare and dear. (Shoulda started with a Record SL, the result would have been the same and I wouldn't be kicking myself so much now.) Still not done, I reshaped and lightened the top part, but tastefully, I think you'd like it, an improvement on the original shape. Then I polished the shaft, masked it off, and beadblasted the top for a pleasing two-tone effect - looks good with those black-ano barrels too.
The punchline is obvious - I'm way overweight - what was I thinking?! I shoulda been out riding instead of obsessing over grams. Well, back when I was lightening my bike, I was a skinny Cat3 racer and rode about as much as I wanted to, so this stuff didn't reduce my saddle time any - morelike whiled away those long Northern winter nights. And nowadays the most common parts replacement I do is to take something light off and put something heavier on.
Mark Bulgier
Seattle, Wa
USA