How to measure for a custom rear sprocket

Discussion in 'Hubs, Gearboxes, Sprockets and Chains' started by 87octane, Mar 23, 2017.

  1. 87octane

    87octane Member

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    What you will need are digital calipers
     

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  2. 87octane

    87octane Member

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    Inside diameter measurement........45.4 and add 1mm for clearance= 46.4mm
     

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  3. 87octane

    87octane Member

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    Bolt circle diameter.......70mm +57mm =127mm /2= 63.5mm bolt circle diameter. I made mine 64mm bolt circle diameter and it worked out fine.
     

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  4. TheNecromancer13

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    Pretty much any set of precision calipers will work, it doesn't have to be digital. I have a set of vernier calipers that serve me just fine.
     
  5. 87octane

    87octane Member

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    I just realized that this method will only work if the two opposite holes are in a straight line through the center. Hopefully, some one will show how to do it when its an odd number of holes.
     
  6. 87octane

    87octane Member

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  7. 87octane

    87octane Member

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    So Far, I have had the best result using Rebel Gears. One week turnaround to California.
     

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