There's a new geometry on the bike combined with the newest Shimano groupset suitable for novice racing in XC and MTB marathons. The Shimano Deore M 5120 is a 1x10 drive with a completely new rear derailleur mechanism. Radon in air is ubiquitous (existing or currently being almost everywhere concurrently). https://bookmarkvids.com/story19716721/rumored-buzz-on-lever-4-0