Leaner Minimum Angle and Track Width

Discussion in 'Hacks' started by Mavigogun, Oct 10, 2020.

  1. Mavigogun

    Mavigogun Adventurer

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    I’m gearing up for a leaner sidecar build; the rig will be paired to a relatively low and short wheel base Suzuki S40/LS650. The car has some dimension constraints based on the standing height of my dog riding face-forward- with the wind shield at the car nose; this constrains car-side lean over to around 25 degrees, with a lean-out width of around 74.5”- very near the EU width limit. Track width is 49”, with an 8.8” car wheel lead, on a cycle wheel base of 58.75”.

    So, a few practical questions for those of you piloting leaners-

    Is a 25 degree max-lean sufficient?

    What are the handling implications of the 49” track width?

    6’3” in a turn is pretty wide, not leaving much line deviation or adjustment; considering such, wouldn’t one tend to avoid heavy leaning altogether, reserving that capacity as response to the unanticipated?

    Thanks for your reflection.
    #1
  2. steam powered

    steam powered just a regular punk

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    Not a leaner pilot, but a couple of observations all the same...

    25 degrees is not a lot to a sportbike rider, but there is plenty of cruisers that are limited to 27 - 28 degrees. That said the Yamaha Niken got panned by many a spec sheet warrior because it could "only" reach 45 degrees. Your riding style is relevant here, if you can live with it, it won't be a problem.

    6'3" is not particularly wide, comparing that to the current BMW cage range, that is a 5 series sedan or X3 suv. They seem to be able to stay in there lane mostly. Although if you look at the width including mirrors, you are narrow than the entire range by more than 4 inches. Totally a non issue.

    And welcome.
    #2
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  3. brstar

    brstar Long timer

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    I would be looking for more lean.
    I assume the 25 degree is towards the sidecar?
    With more as you lean away?
    Your dog will lean with the cornering so the screen location and height is a variable that's adaptable.
    I get the variation in width.
    It's a bit disconcerting in traffic round abouts.
    Having to allow for different amounts of road space needed.
    My rig as a leaner was 6ft wide upright.
    Which is the legal maximum width here.
    Of course it was 7ft or so when turning hard towards the bike.
    But a long rigid truck is 8ft plus the extra road it uses turning.
    So shouldn't be an issue.
    Just don't lean into oncoming traffic.
    Please post pics as soon as you can.
    #3
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  4. Hellracer.nl

    Hellracer.nl What the hack???

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    25 degrees is not enough.
    I'm at 44 degrees and regularly wish for more.
    Don't forget that you'll need more lean than a solo bike because you're pushing more weight round the corner.

    Leaner riding is a lot of fun but with only 25 degrees lean angle it will very soon become very dangerous.
    #4
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  5. Mavigogun

    Mavigogun Adventurer

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    I appreciate the feedback. I don’t think I can stomach your 88” bike-side lean; I hope to find a happy medium, perhaps safely- and practically -delivered by operating at conservative seeds?
    #5
  6. brstar

    brstar Long timer

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    Conservative speeds doesn't include the unexpected.
    It's easy enough to achieve a good lean angle.
    The sidecar suspension and wheel is one factor in how much width is needed.
    Keep it narrow and there should be enough space available.
    Don't forget if you drop a bike there's a risk of it hurting you.
    If you drop a leaner then there's more and possibly un predictable metal looking to cause pain stress and trauma .
    Enjoy but be safe.
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  7. Jack Grinder

    Jack Grinder Adventurer

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    I also am looking to the leaner side. does it handle the same as two wheels, any safety issues? This is what I'm going for but in a leaning version BMW-F650-9-1024x731.jpg
    #7
  8. Hellracer.nl

    Hellracer.nl What the hack???

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    Are you sure about that?
    With a tub this high, there will be very little room for leaning. Turns to the right will become a challenge.
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  9. Jack Grinder

    Jack Grinder Adventurer

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    No, not sure. I have a DR650 and was looking to add a enduro style (dirt and gravel road) leaning sidecar. I was thinking it would help to retain the motorcycle ride if it leaned.
    With that said, I have never driven a hack so felt I should do some research before investing.

    Any advise would be appreciated.

    I did not know there are two styles of leaning sidecar, I am looking at both bike and sidecar leaning in tandem.
    #9