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Transition Sentinel Alloy GX

Transition Sentinel Alloy GX
Color: Black Powder
Size: Small
Wheel Size: 29-inch
Please select options Unavailable


The Hard Charging All-Rounder
The Sentinel inspires confidence like you're wearing full body armor.

It's forgiving do-it-all attitude truly blurs the lines between planted bottomless sender and playful poppy trail pony. Whether you're chasing EWS dreams or just a weekend afternoon escape, it will bring out the best in you. So easy to get acquainted with you'll find yourself sending lines, jumps and maneuvers you always felt were beyond your ability. Where before you went around, now you go over. Where you pushed up, now you pedal. Where you rolled, now you boost.


We want to make it as easy as possible to experience great rear suspension performance. The GiddyUp suspension system is designed to behave intuitively across a broad range of setup. Because, we get it, sometimes you just want to grab your bike and GiddyUp, without checking your setup. When you do, it will always feel good.

We did this by balancing a 25% progressive leverage curve with a consistent linear rate of change. Anti-squat is tuned to enhance pedaling performance and acceleration. Overall chain growth is moderate and reduces after sag so chain tension doesn't get in the way of the suspension working.

This translates to killer small bump compliance and great mid-stroke support that gradually transitions into an end of stroke ramp that is subtle, yet supportive. The amount of consistent progression is carefully optimized for both air and coil shocks. Riders are able to add or remove volume spacers in air shocks to suite their individual riding style and there is no compromise to bottom out support with coil shocks. The Sentinel has 150mm of rear wheel travel when used with the supplied 205mm x 62.5mm stroke shock. It is also possible to install a shorter, 205mm x 57.5mm stroke shock, to decrease the rear wheel travel to 140mm.

A wide usable sag range of 25 - 35% allows the rider to tune the feel of the bike; from poppy and playful, to planted for plowing. Wherever you end up, you can focus on the trail without remotes, levers or knobs. Just grab your bike and GiddyUp.

A. REACH 420 450 476 501 521
B. STACK 613 622 631 640 649
C. EFFECTIVE TT LENGTH 552 585 613 641 665
D. SEAT TUBE LENGTH 350 390 430 460 490
E. EFFECTIVE ST ANGLE 78.2° 77.5° 76.9° 76.4° 76.0°
ACTUAL ST ANGLE 70.8° 70.8° 70.8° 70.8° 70.8°
SEAT TUBE OFFSET AT BB 87 87 87 87 87
F. HEAD TUBE LENGTH 100 110 120 130 140
G. HEAD TUBE ANGLE 63.6° 63.6° 63.6° 63.6° 63.6°
H. CHAINSTAY LENGTH 440 440 440 440 440
I. WHEELBASE 1199 1233 1263 1292 1316
J. BOTTOM BRACKET DROP 29 29 29 29 29
K. ESTIMATED BB HEIGHT 346 346 346 347 347
L. STAND OVER HEIGHT 671 688 700 712 722
M. FORK OFFSET 43 43 43 43 43


Fork Fox Float 36 Grip 2 Performance Elite (160mm)
Hubs DT Swiss 370 Ratchet LN or RaceFace Trace 28H
Rims DT Swiss M 1900 Spline 30 or RaceFace Aeffect R
Stem ANVL Swage (40mm)
Chain SRAM GX Eagle
Frame Sentinel Alloy 150mm
Tires Front: Maxxis Assegai 3C EXO+ (2.5)
Rear: Maxxis Minion DHRII 3C EXO+ (2.4)
Brakes TRP DH-R-Evo
Saddle ANVL Forge Cromo or SDG Bel Air 3
Spokes DT Swiss Champion or RaceFace 2.0/1.7/2.0
Crankset SRAM GX Eagle DUB (30t/170mm)
Seatpost OneUp Dropper Post SM(150mm) MD(180mm) LG/XL/XXL(210mm)
Shifters SRAM GX Eagle
Handlebars ANVL Mandrel Alloy 35 SM/MD(800x20) LG/XL(800x30) XXL(800x40)
Rear Shock Fox Float X Performance Elite (205x62.5mm)
Tape/Grips ODI Elite Flow
Rear Derailleur SRAM GX Eagle
Cassette/Freewheel SRAM XG 1275 (10-52t)
Rotors TRP R1 2.3 (203mm)
Headset FSA No.57E
Accessories & Extras Tubeless Valves & Sealant

* Subject to change without notice.

Part Numbers

Option UPC MPN Store SKU
Black Powder / Small / 29-inch 769165689344 COM39104693R