B-tension adjustment hard to get right; 12-speed chain has a short lifespan; shifting isn’t as crisp as more expensive offerings Shimano’s newest Deore M6100 12-speed groupset takes key elements of ...

Shimano Deore has made the jump to 12-speed with the new Deore M6100 mountain bike groupset, adopting nearly all of the tech seen on the brand’s higher-tier options and getting a premium-looking ...