Originally Posted by
tommymc
Wow, the width difference is less than 8 thousands. The latest engineering is impressive but I think I'll stick to 6-8 speed friction shifted drivetrains for third-world adventures (and most real-world biking in the US).
The outer width varies a lot more. Contemporary 10 speed chains are 5.9mm wide vs 6.6-6.8mm for 9 speed, 7.1-7.3mm for 7/8 speed (8 kept the spacing but increased rear axle OLD to 130mm), and 7.8mm for 6 speed.