This is officially a size medium that fits somewhere between a medium and small with a standover of 29 inches. It has a carbon frame, 27.5 x 2.8 inch wheels, Shimano XT 1x11 components, XT hydraulic disc brakes, Fox factory 34 fork with lockout, Fox Float rear shock, carbon handlebars, carbon crank, and a dropper seatpost. Running tubeless with fresh Stan’s sealant. Except for some chips in the rear triangle from towing a kid trailer (see pictures), it’s in excellent condition. This was around $4,000 new. For complete specifications see: https://www.pivotcycles.com/en-us/bike-archive/mach-429-trail.