Peugeot 531 frame weighs only 1630g?
08-30-21, 10:38 AM
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Peugeot 531 frame weighs only 1630g?
There was a 54cm Peugeot PS10 frame on Ebay with 531 tubing frame. Looks like it weighs 1630g - with the steel(?) BB cups still on the frame. How did Peugeot manage to make this frame so light? This is as light as a 753 frame.
08-30-21, 11:23 AM
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The scale snapshot shows 2300+
is this with the fork?
kind of curious
is this with the fork?
kind of curious
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08-30-21, 12:00 PM
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I weighed my full 531 frame and fork when it came back from a powder coater. Unfortunately, I can't remember where I wrote down the info, but my memory is that it was about 5.5 lbs.
08-30-21, 12:08 PM
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08-30-21, 12:49 PM
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Gitane TDF, 48cm, full 531 DB, 2005g bare frame, 720g fork
Motobecane Grand Record, 56.5cm, 531 DB triangle & forks, 2095g bare frame, 770g fork
I doubt any 531 frame (of normal size) ever weighed 1630. The fork weight is about right.
A 531SL tubeset had a quoted weight of 3.75 lbs, that's 1700g, more-or-less; add braze, bridges, dropouts, lugs...
A set of steel cups is only about 100g, so you could have a heavy-ish big 531 frame and get up to that weight.
Last edited by oneclick; 08-30-21 at 12:59 PM.
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08-30-21, 01:00 PM
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There are a number of 531 tubing iterations.
Scroll down to the bottom of this page: https://raleigh-sb4059.com/2018/09/30/frame-weights-of-specialist-bicycle-development-unit-sbdu-reynolds-753-and-531-frames/
Author details the frame weights of over 30 Raleigh SBDU bikes - many built w/ Reynolds 531.
~1650-~1700 is about right for a 54cm frame built w/ Reynolds 531SL. Note, however, a 531C or 531P frame would not be much heavier, maybe only 100 - 50grams respectively. Obviously, there is alot more to frame weight than the tubing alone.
Scroll down to the bottom of this page: https://raleigh-sb4059.com/2018/09/30/frame-weights-of-specialist-bicycle-development-unit-sbdu-reynolds-753-and-531-frames/
Author details the frame weights of over 30 Raleigh SBDU bikes - many built w/ Reynolds 531.
~1650-~1700 is about right for a 54cm frame built w/ Reynolds 531SL. Note, however, a 531C or 531P frame would not be much heavier, maybe only 100 - 50grams respectively. Obviously, there is alot more to frame weight than the tubing alone.
Last edited by tendency; 08-30-21 at 01:19 PM.
08-30-21, 01:14 PM
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F&F weigh what they should - not super light.
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08-30-21, 01:24 PM
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2343g likely = frame only (no fork) but possibly not a full 531 frame. I have 2 full 531 frames, both 59CM C-T and one weighs 2130 and the other 2030. 200+/- grams is not a lot, so it could be full Reynolds as well, depending on treatment and year.
08-30-21, 02:59 PM
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the Reynolds transfer is pretty beat, quite possibly a three main tubes 531, plus the fork.
2300+ for the frame would align pretty well.
2300+ for the frame would align pretty well.
08-30-21, 03:12 PM
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The PS/PSN 10 is a "3 tubes renforcées" bike. The decal remnants confirm that.
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