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It is: 63-48 = 15
48
21 is the answer
If the crank has 48 and the sprocket 12 then 48/12=4. The wheel will turn 4 times for each turn of the crank.
They came stock with a 49T or 48T rear sprocket you can choose a replacement with either a 48T, 49T, 50T, or 51T, if you have the old sprocket count the teeth on the sprocket and that tells if it is a 48T, 49T or whatever (48T = 48 teeth)
A good sprocket ratio for take off is 3.0:1 and up like 16/48 combination will have you pulling up in first.
20 rpm
48 degrees Celsius
48-2 = 46
48 - 8 = 40.
Two days (or 48 hours) are between June 11 and June 13th.
I am 48 years old and I am now getting my fourth wisdom tooth.