Zeda 80 Kit Options: Heads and sprocket size.

So would 27.0 = 37 tooth? JOhn
Do a true diameter check on the tire. Hold the wheel perpendicular to the ground. Hold a level on top of the tire and get level. Measure from the bottom of the level to the ground; that'll be your true diameter.

For example my 26" Kendra 838 tires true diameter is 26.25"
 
27 inch on a similar bike I have here (1980 Schwinn Traveler with 1.25"tire) measures @ about 26 &7/8" from ground to top of tire.

700c Mavic wheel on a Trek measured to almost exactly 26" from ground to top of tire--but this was a narrow 23 Bontraeger racing tire.

John
 
27 inch on a similar bike I have here (1980 Schwinn Traveler with 1.25"tire) measures @ about 26 &7/8" from ground to top of tire.

700c Mavic wheel on a Trek measured to almost exactly 26" from ground to top of tire--but this was a narrow 23 Bontraeger racing tire.

John
700mm ÷ 25.4mm = 27 9/16 so I'm going to assume you're talking about the rim
 

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Sorry to repost late in this thread, but I ran across this link for various sprocket sizes that looked like a good price ($10.99-$15.99 ) with free shipping:

Multiple Spocket Sizes.

Not sure about the quality, but they list the 38 tooth option discussed above and several other size options.
John
 
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