The Sentinel was designed for 29er skeptics. A bike so capable, playful and fun that even the most staunch 29er naysayer will instantly convert. With our reverse mullet suspension configuration, the Sentinel stays responsive and playful while delivering incredible downhill monster truck capabilities. Our Speed Balanced Geometry is the crown jewel that unlocks 100% of the potential of this bike. With SBG you get improved climbing and cornering traction along with incredible composure and control that won't flinch when you open it up on steep, fast, technical descents.

Transition SENTINEL GX

The Transition Sentinel is a formidable enduro bike, excelling in downhill performance with a design that inspires confidence on rough and steep terrain. Its suspension system, featuring Speed Balanced Geometry (SBG), provides a plush ride that handles everything from chattery trails to big drops, though it requires an active riding style to shine. While it climbs competently, it's happiest when pointed downhill, offering stability and playfulness that rewards aggressive riders.

MSRP	$4,999
Where to Buy	— $1 At
Category	Enduro
Weight	30.2 lbs
	5.8
Frame	Aluminum
	RockShox Lyrik
	Fox Float DPX2 Performance Elite
Wheels	Aluminum
Wheel Size	29″
	SRAM Code R Hydraulic Disc


	GX Eagle, Truvativ Descendant
Drivetrain	1 × 12
Suspension	Full
Front Travel	160mm
Rear Travel	140mm
Brand Site	transitionbikes.com
Summary	The Transition SENTINEL GX is a 29″ aluminum frame full suspension enduro bike with high-end components.

Frame	Aluminum BB Standard: BSA, 73mm, Threaded
Fork	RockShox Lyrik RC Solo Air 160mm Travel: 160mm Spring Type: Air
Shock	Fox DPX2 Performance Elite Travel: 140mm
Bottom Bracket	73mm BSA Threaded
Headset	FSA No.57E
Stem	RaceFace Aeffect R (40mm)
Handlebar	RaceFace Chester 35 (780mm x 20mm)
Saddle	ANVL Forge Stealth Cromo
Seatpost	RockShox Reverb Stealth Type: Dropper
Pedals	N/A
Grips	Velo Single Clamp

Rear Derailleur	SRAM GX Eagle
Front Derailleur	No Support
Crank	SRAM Descendent 6K (30t, 170mm)
Shifters	SRAM GX Eagle
Cassette	SRAM XG 1275 (10-50t)
Chain	SRAM GX Eagle
Chain Guide	N/A
Brakes	SRAM Code R, Rear: 180mm Post Mount Type: SRAM Code R Hydraulic Disc
Brake Levers	SRAM Code R

Rims	E*Thirteen TRS 30mm
Front Hub	Novatec D711SB & D462SB XD
Rear Hub	Novatec D711SB & D462SB XD
Tires	Maxxis Minion DHF / DHR II 2.3 EXO Dual
Disc Rotors	SRAM Centerline (180mm)