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  1. #1
    mtbr member
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    Weight loss converting

    I have a Raleigh Grand Prix (road bike) that I want to convert to a 3 or 5 speed IGH Gravel grinder. I am wondering what kind of weight loss I might have on the bike by doing this. Also, I am a US citizen living in Cambodia where is is either hot and dry or hot and wet/humid/rainy. What 3 or 5 speed IGH will handle this type of riding?
    Weight loss converting-dsc00929.jpg

    Here is what I want to do
    Front wheel
    27 x 1 1/4 aluminum rim 36 hole w/ eyelets
    2mm SS spokes
    Plated brass nipples
    High flange aluminum hub 36 hole(rebuild existing)
    Kenda 27x 1 1 3/8 gravel tire gum wall

    Rear wheel

    27 x 1 1/4 aluminum rim 36 hole w/ eyelets
    2mm SS spokes
    Plated brass nipples
    High flange aluminum hub 36 hole Sturmey - Archer 3 speed
    Kenda 27x 1 1 3/8 gravel tire gum wall

    Remove;

    Front wheel Steel rim(rebuild hub for new rim)
    Rear wheel Steel rim
    Rear derailleur & hanger
    RD cable & housing
    Front derailleur
    FD cable & housing
    small crankring

    Replace;
    Down tube double/10 speed shifter clamp to single side/5 speed clamp on

    New
    3 speed down tube shifter and cable

    Options
    Coaster brake and remove hand brakes.
    5 speed IGH S/A
    Brake levers to aero



    So I am looking for answers to 2 questions
    1. What 3 to 5 speed IGH?
    2. What weight difference to expect?

  2. #2
    dru
    dru is offline
    mtbr member
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    2,636
    I have the made in Canada version of that exact same bike and it's simply a pig. I've upgraded my drivertain considerably and it's still 27 lbs: Sugino cranks, 700c aluminum wheels, ultegra shifters and rear D :-(

    Your bike is low end as is mine, sorry to say.

    I'd hedge a bet converting to IGH might cost you more in weight, but I'd seriously doubt you'll come in any lighter.

    On top of that you'll really notice the IGH drag on a road bike compared to traditional gears.

    I love my Alfine as a MTB drivetrain, but it sucks for serious road work.

    I rode it for a season with our local road club so I'd know.

    Drew
    occasional cyclist

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