Frankie_Castles
Oct 7 2003, 02:34 PM
If 14t coaster sprocket used, how many teeth on chainwheel? like whats the correct ratio for a 14t rear sprocket
Markz
Oct 7 2003, 02:52 PM
Start with this article by JB:
BMX Basics: The secrets of gearing Up above you will see a menu option for "Everything Else". Under that heading you will see the gearing calculator. I believe, someone correct me if I'm wrong, 53 is a good starting point for gear inches. So with your 14t fwheel and a 37t sprocket with a 20" wheel you get 52.857142857142854 gear inches.
jesboogie
Oct 7 2003, 04:27 PM
39-14 is the standard. I use it and love it. That combo is the 'new' 44-16
Jesse D
billn
Oct 8 2003, 08:18 AM
The general rule is 3 teeth on the front equals 1 tooth on the rear in either direction. So if you start with the 'standard' of 44/16, when you drop 2 teeth on the rear, drop 6 teet on the front, resulting in a 38/14. Same goes for adding teeth - 47/17 roughly equals 44/16. This a rough guideline, so use it as such. Actual gear inches, as described in an earlier post, is much more accurate.
Bill Nicholson