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  1. #1
    New Orleans
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    Does 853 Reynolds come in different thicknesses?

    Does Reynolds 853 come in different thicknesses like 531 did? I'm curious because I had a 853 MTB frame, and it wasn't particularly light, in fact I'm pretty sure it was heavier than my 20.5 inch 531 SL frame despite the 531 having much longer tubes. It was a 13" with an actual C-C seatpost of 11.5"-a tiny frame that weighed ~2600 grams without a fork-a 2001 Dragon(their current published weights are much less now).A good steel road fork would be about 650 grams,I think,so it would be 3250 grams-7lbs plus.
    Thanks,
    Charlie

  2. #2
    Decrepit Member Scooper's Avatar
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    Quote Originally Posted by phoebeisis
    Does Reynolds 853 come in different thicknesses like 531 did?
    Yes. Attached is the Reynolds "Part List" with the dimensions, shapes, and wall thicknesses of various 853 tubes.
    Attached Files Attached Files
    - Stan

  3. #3
    New Orleans
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    Thanks!

    Thanks! I wonder how much lighter an 853 can be vs a 531-1/4 lb maybe?
    Thanks,
    Charlie

  4. #4
    Decrepit Member Scooper's Avatar
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    Quote Originally Posted by phoebeisis
    Thanks! I wonder how much lighter an 853 can be vs a 531-1/4 lb maybe?
    Thanks,
    Charlie
    Charlie, I can't answer that, but maybe someone in the framebuilders forum can. What I can say is that for a given frame size and geometery using the same diameter tubes, 853 can be lighter since it's stronger and stiffer than 531 and can therefore have thinner walls for a given strength and stiffness.

    Here's a chart from the Reynolds website showing the relative strength (MPa) and stiffness (GPa) of various Reynolds tubing materials. Although it doesn't show 531, it does show 631 which is just slightly stronger than 531. I would think you could save significantly more than a quarter pound in frame weight by using 853 instead of 531 on an average size (say, 56 - 58 cm) frame.

    - Stan

  5. #5
    Senior Member Nessism's Avatar
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    Quote Originally Posted by Scooper
    Charlie, I can't answer that, but maybe someone in the framebuilders forum can. What I can say is that for a given frame size and geometery using the same diameter tubes, 853 can be lighter since it's stronger and stiffer than 531 and can therefore have thinner walls for a given strength and stiffness.
    The steel in 853 is not stiffer than the steel in 531, in fact, the stiffness of all steels is pretty much the same. 853 is stronger so the tubes can be made thinner thus saving weight. When the tubes are made thinner they are made more flexable so Reynolds increases the diameter to get back the stiffness.

    Overall, my guess is that a 853 frame will be about 1/4 to 1/3 lbs. lighter than a 531 frame.
    Becareful buying/selling bike parts on-line. I learned the hard way. :(

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  6. #6
    Decrepit Member Scooper's Avatar
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    Yep. Nessism is correct; my bad. The stiffness of all steels is pretty much the same at 207 GPa. Don't know what I was thinking.
    - Stan

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