Gearing ratio on XX1 1x11 v. XTR 3x9--what am I missing here? | Mountain Bike Reviews Forum
Is there a major difference in sprinting with a 50T chain ring/11T small cog (4.54 ratio) vs. 52T/12T (4.33 ratio)? Which is recommended? - Quora
kstoerz.com | visual drivetrain comparison tool
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Gear Ratios: Comparing 2x10 versus 1x11 Mountain Bike Drivetrains - Bikerumor
Cycling App of the Week: Bike Gear Calculator | road.cc