The Bottom Line
Ultimately, the battle for market share in bicycle components realises more innovation and better products generally. Both Shimano and SRAM offer similar ranges, and usable tech.
SRAM are the cool kids on the block, and are often first to market – the big gold Eagle cassette launched in 2016, for example, that’s already trickling down to cheaper groupsets.
Shimano are more conservative. They often take a while to deliver new technology; but when they do, you can bank on their craftsmanship.
Sometimes, choosing the right groupset comes down simply to looks. And there’s nothing more subjective than that.