For suspension, you get a similar Fox DPX2 Performance rear shock found on the XO1 build kit as well as the always impressive Fox 36 with the new Grip damper.
For the drivetrain, 12spd GX Eagle has a massive range (50-10 tooth) for getting you up super steep climbs.
The build continues to punch above its weight class by offering 4 piston Code R brakes for superior stopping power and fade resistance, Stans Flow S1 comp complete wheelset, and favorite 3C Maxxis Minion tires.
Transition purposely built this spec so you didn't need to upgrade a single part on this bike, just set and forget.
https://www.transitionbikes.com/Sizing.cfm
FORK AXLE TO CROWN 571mm
FORK OFFSET 42mm (Rockshox) / 44mm (Fox)
REAR SHOCK SIZE 205mm x 57.5mm
REAR SHOCK HARDWARE Trunion Bearing Mount Top / 25mm x 8mm Bottom
BEARINGS Full EnduroMax Sealed Cartridge Bearings
HEADSET 44mm Zero Stack (Top) / 56mm Zero Stack (Bottom)
BOTTOM BRACKET 73mm BSA Threaded
REAR BRAKE 180mm Post Mount
REAR AXLE Syntace X12 148
FRONT DERAILLEUR No Support
ISCG TABS ISCG05
SEATPOST DIAMETER 31.6mm
MAX SEATPOST INSERTION ALLOY Small 190mm, Medium 230mm, Large 270mm, XL/XXL 300mm
MAX SEATPOST INSERTION CARBON Small 190mm, Medium 225mm, Large 245mm, XL 245mm
SEAT CLAMP Alloy 34.9mm/Carbon 37mm
MAXIMUM CHAINRING 34t
MAXIMUM TIRE 29 x 2.5
SAG SETUP 18-20mm (32-35%)
FRAME WEIGHT (Medium with Shock/Axle/Hardware) Carbon 7.05 lbs. - 3.2 Kg | Alloy 9.61 lbs. - 4.36 Kg