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Thread: backpack weight

  1. #1
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    backpack weight

    On long rides I take a back pack with extra tube and such. I've heard that every pound on bike equals five in pack. Is this ratio correct?

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    rugged individualist wphamilton's Avatar
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    I think it makes a difference if your bike has suspension, in how well it holds the road. On a road bike with no suspension (ie, your body is the suspension spring) it's only sprung weight if you're out of the seat and cornering, accelerating or stopping. It won't make any difference in performance, acceleration, going up hills etc. So mostly "no", but in the specific case of cornering on the road with a mtb I'd expect that to be about right.

    For a road bike, the advantage is also counterbalanced by the advantages of having the load carried low, which is the preference of most touring cyclists.

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    Senior Member datlas's Avatar
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    No. I think the correct ratio is really 1:1.

    On the other hand, I don't think backpacks really have much of a role on a road bike. Most of us use a saddle bag and/or jersey pockets.
    Quote Originally Posted by RUOkie View Post
    never underestimate the idiocy of BF.

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    Senior Member halfspeed's Avatar
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    A backpack is a pretty awful way to carry weight on a road bike, especially if your position is at all aggressive. If your long rides take enough time that you can't carry what you need in a jersey pocket, a Carradice or even a handle bar bag are good alternatives.
    Telemachus has, indeed, sneezed.

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    downhill quickly
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    Fify:

    Quote Originally Posted by dusty01 View Post
    on long rides i take a back pack with extra tube and such. I've heard that every pound in the pack equals 5 on the bike. Is this ratio correct?

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    This is kinda what I was thinking, but I've had the conversation with a few people and this is what I was told.

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    Senior Member MegaTom's Avatar
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    Quote Originally Posted by dusty01 View Post
    This is kinda what I was thinking, but I've had the conversation with a few people and this is what I was told.
    Now you're having a conversation with another few people and they're telling you different. What're ya gonna do...?

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    Zoom zoom zoom zoom bonk znomit's Avatar
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    What's the ratio in metric?

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    I'm going think what I orginally thought that it don't matter weight is weight.

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    Senior Member datlas's Avatar
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    Yes. It does not matter. Weight is weight.

    Except for rotating weight...

    Maybe.
    Quote Originally Posted by RUOkie View Post
    never underestimate the idiocy of BF.

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    Senior Member Homebrew01's Avatar
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    Quote Originally Posted by datlas View Post
    No. I think the correct ratio is really 1:1.

    On the other hand, I don't think backpacks really have much of a role on a road bike. Most of us use a saddle bag and/or jersey pockets.
    Yup.
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

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    downhill quickly
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    Quote Originally Posted by datlas View Post
    Yes. It does not matter. Weight is weight.

    Except for rotating weight...

    Maybe.
    rotational..."maybe" just a hair more towards "perhaps".

    Yes, weight is weight, but, one thing is true: placing that additional weight anywhere on your person will have a greater negative impact. It does influence as a cost of energy and stress to you at all your bike touch points as well as the overall physiological adaptation you make to carry that weight on your personal frame. Your better served lugging that weight on your bike frame. Your are even better served eliminating that weight altogether

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    Senior Member shoota's Avatar
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    Do yourself a favor and ditch the backpack.
    2005 Cannondale six13 10s SRAM

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