It’s not often I write a quick blog post, but this is just too exciting to wait for a full and detailed review – so here is a short teaser of what just landed in the workshop! This is a really amazing and rare SBDU frame – there will be more to write on this one in a little while, but for now, I’d like you to meet SB4409, a 1981 753 Dynaflite.
Never heard of the Dynaflite? I’m not surprised, there weren’t that many built. The word ‘Rare‘ is often commonplace when talking about classic bikes and bike parts; some bikes are described as rare because only a few hundred or few thousand exist of the many tens of thousands that were made, but with the 753 Dynaflite, the word ‘Rare‘ takes on another meaning altogether, it takes the meaning of ‘Rare‘ to a completely different and altogether higher level! It’s thought that no more than 25 of these SBDU Specials were ever built. So from those reputed 25 frames, how many still exist? I’ve seen a picture of one other Dynaflite and heard a story about a second and then there is this one, the third, that is all, three known frames. Now that is what ‘Rare‘ means!
Why was the Dynaflite rare? There are a few reasons. First, they were a special build, they weren’t a standard model of road or time trial frame. Second, they were fillet brazed, so there is no seat lug or head lugs or standard bottom bracket shell. Third, not only were they fillet brazed, they were 753 tubes which many think could not be fillet brazed. And finally, the tubing was Reynolds 753 Aero, where each tube is shaped specifically for it’s purpose in the frame. These frames took incredible technique and skill to build.
I said it would be a short post and that is where I’m leaving it for now. I really want to write lots but I’ll save it till later. I just wanted to get this frame out there and published onto the blog. In the next post I’ll expand on some of these features with lots more images and look at the frame geometry, build process and the amazing details of this special frame.