Cycling Mob: Road Cycling, Mountain Biking and More - View Single Post - Which Bike gear is faster? 39/14 or 25/9?

Rusty · 01-12-2008, 03:50 AM

39/14 and 25/9 are pretty much the same ratio. 2.78 for the 39/14 and 2.77 for the 25/9, so for all intents and purposes, they are identical. 20 inch wheels=55.5 gear inches, 24 inch wheels=66.72 gear inches, 26 inch wheels=72.28 gear inches, etc. Stick with the bigger sprocket/freewheel combo. More teeth=stronger, lasts longer.

01-12-2008, 03:50 AM	#2 (permalink)
Rusty Junior Member Join Date: Jul 2007 Posts: 8	39/14 and 25/9 are pretty much the same ratio. 2.78 for the 39/14 and 2.77 for the 25/9, so for all intents and purposes, they are identical. 20 inch wheels=55.5 gear inches, 24 inch wheels=66.72 gear inches, 26 inch wheels=72.28 gear inches, etc. Stick with the bigger sprocket/freewheel combo. More teeth=stronger, lasts longer. __________________ Powered by Yahoo! Answers