This is a great starter mountain bike already built out and ready for the road or the trails. The suspension on the bike compresses very well so it’s a great dirt bike. It’s not adjustable. The bike has dual suspension, 21 speeds and is super easy to work with. No need to worry about assembling and dealing with brakes, everything's already done for you! Aluminum MTB frame with 4 bar linkage Full suspension bike 18 inch Frame Steel riser MTB handlebars Suspension fork with 80mm travel Coil rear shocks with 80mm travel Shimano EF40 21-speed Shimano front derailleur Shimano Tourney TZ40 SIS rear derailleur Velo black padded saddle Alloy micro adjust 27.2 X 300mm seat post with quick-release Rear Disk brake 160mm linear pull