Cheap scales for weighing sidecar rig

Discussion in 'Hacks' started by brando4905, Dec 7, 2017 at 5:08 AM.

  1. brando4905

    brando4905 Been here awhile

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    I’m sure someone will tell me I did it wrong, but.......

    I had called Klaus at EPM to get new shocks for a new to me sidecar rig, he wanted weights of the three corners with and without load. I have a race car buddy that had car scales but they were buried deep in his trailer and couldn’t be found. So I started searching for high capacity scales with a big enough deck to weigh all there wheels. I found this one on Amazon, it’s the My Weigh SCMXLT700 for $65.

    I took a few pics of unloaded weighing. I had no idea I’d come close to capping out the scale on either of the three corners, but came close on the rear with full load at 682lbs.!

    I know the most accurate way (or weigh), would be three scales at once, but I feel this method is certainly close enough for new shocks.

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    2C52C9BB-3477-4C3E-B2A9-BF786721A71E.jpeg

    #1
  2. Ridn3

    Ridn3 Lopsidd

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    Now try it with a spacer the same thickness as the scale under the other two wheels and see how much it effects the weight. Just curious.
    #2
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  3. cycleman2

    cycleman2 Been here awhile

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    I agree, accurate enough for shocks.

    I've never weighed each wheel on my rig, just used the truck scales for a total loaded weight. It would be interesting to just weight the bike wheels with the sidecar off, just to see how much weight the sidecar adds to the bike at rest. That load would certainly change a bit going down the road, but a lot of that would be lateral loading so hard to figure out the actual weight of the rig on the bike. Sidecars tend to be set up to run level going down the road so I imagine it would be similar to the tongue weight of a trailer.
    #3
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  4. brianjonesphoto

    brianjonesphoto Single Track Noob

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    I did a very slow similar thing last year trying to figure out spring rates. I used significantly cheaper scales and they were not up to the job. On thing I did differently was to make some plywood platforms the were level with the tops of the scales. This allowed me to roll the rig on and off all 3 scales for a more accurate readings of each corner at the same time.
    #4
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  5. Bobmws

    Bobmws Curmudgeon At Large

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    Same trailer, different park, FL
    I was able to use the track scale at a local sand plant to weigh my rig. This scale was built flush in the ground so I was able to position each wheel on it individually. Those weights were sent to Klaus and the shock he sent were perfect! Your method will be fine.
    #5
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  6. DRONE

    DRONE Dog Chauffeur

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    $65! That's a pretty good deal for a scale that'll go up that high--nice find!

    I figger that since sometimes I ride with a full tank and sometimes with an empty tank, sometimes with a passenger and sometimes alone, sometimes with camping gear for a multi-week trip and sometimes with no gear, that weighing each wheel just needs to be in the ballpark. This gives Klaus an idea of what he's dealing with. With the dual rate springs he uses on the HyperPros, he can give you a ride that's not too springy when riding light and not undersprung when riding heavy.
    #6
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  7. DRONE

    DRONE Dog Chauffeur

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    BTW, is that 3 bags of sand in the car? I think that when I travel with my 50-lb dog and all my camping gear and tools loaded, that would be like 2 bags.
    #7
  8. brando4905

    brando4905 Been here awhile

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    That’s two 60lb bags. Simulating the weight of my dogs, plus I had a few pounds in the trunk acting as gear weight.

    Now to figure how to get the two dogs comfortable in the car!
    #8
  9. cycleman2

    cycleman2 Been here awhile

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    I've read that you should feed them ( likely one at a time ) in the car. I read a post on here somewhere about that.
    #9
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  10. szurszewski

    szurszewski Long timer

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    Train one to ride pillion...and the other to drive, and then YOU can ride in the car!
    #10
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