Bike Drivetrain Design

I am redesigning my drivetrain this offseason. I am running what is referred to a 3x10 drivetrain (3 chainrings on the front derailleur and 10 cogs on the rear cassette) . The big picture here is that I have a drivetrain with 8,000+ miles on it that needs to be replaced this offseason. The changes I am looking to make are the shifters (more robust and reliable SunTour vintage bar-end shifters), a…