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Old 03-22-21, 03:34 AM
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Originally Posted by bulgie View Post
All the 753 blades I have measured were just as thick as 531. So even in the worst case where you lost the heat-treat, they'd be as strong as 531, which are if anything a bit too strong for my taste, for most riders and purposes.

I really wish they'd made a lighter blade, to make proper use of the stronger steel, if only to get a more supple, bump-eating "undamped suspension". And maybe they did, but again all I saw were the heavy ones. Even Columbus SL were a little lighter than 753 IIRC.

Plus you can put brake bosses on with silver, if you make a suitable fillet. Fillet Pro from Cycle Design is probably the best filler rod to use, though any old 40% silver is probably good enough if done properly. Yes 40% has a liquidus a little hotter than Reynolds recommended for 753, but still way cooler than brass, and with fillet brazing you're working above the solidus but below the liquidus in theory anyway.

Mark B
They created such a myth around 753. As you say since it was stronger the idea is to make it thinner. I think they did do that for the rest of the frame if not the fork. But then they brought out something called "653" for a time which was apparently 753 but minus the heat treatment. In other words thinner 531. But that was obviously considered strong enough to actually use on a bike. Some people even made mountain bikes out of it.
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