Half a dozen frame builders will correct me after I say this but...
The original 753 was a very thin gauge tubeset that took advantage of the heat treated alloy's high yield and tensile strengths to "get away with" very thin walled tubes. Since the stiffness (modulus?) of steel tubes doesn't change with different alloys, the super-thin early 753 built up into pretty flexy frames. 753R was introduced with a bit of extra meat and built into frames that were closer in stiffness and weight to ordinary 531 frames. I think the 753 tubes were a touch lighter than 531C, and supposedly they could be built into very lively framesets.
Tom Dalton
> My recently acquired 753R Peugeot frame has chrome
> on the stays. Isn't that
> considered a no-no by Reynolds? I've seen chrome on
> the very-similar 753 "z"
> team bikes as well.
>
> Also, what is 753R? This frame weighs 1/4 lb less
> than my TI-Raleigh 753.
>
> Jack "mention team Raleighs and noone will notice
> I'm off topic by 3 years "
> Bissell
> Tucson, Az-- crisp, clear 50s
>
>
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