Transition Bikes Sentinel

SEND-IT-ALL ON THE ALL NEW SENTINEL

A bike that says yes to every trail, every ride and begs for more.

The Sentinel rides the lines between planted bottomless sender and playful, poppy trail pony. This leaves it right in the sweet spot, as we like to call it. It's versatile attitude helps riders excel and push their limits, making it the one bike most will need. Its intuitive nature is 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. It's time to Send-It-All.

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PRICE

$4,899 USD

$3,299 USD

$4,499 USD

$6,199 USD

$7,899 USD

$2,199 USD

$3,399 USD

FRAME

Sentinel Carbon 150mm

Sentinel Alloy 150mm

Sentinel Carbon 150mm

Sentinel Alloy 150mm

Sentinel Carbon 150mm

WHEEL SIZE

29" (X-Small 27.5")

REAR SHOCK

RockShox Super Deluxe Select
(205x60mm)

RockShox SuperDeluxe Base
(205x60mm)

RockShox Super Deluxe Select+
(205x60mm)

RockShox Super Deluxe Ultimate
(205x60mm)

Fox Float X Factory
(205x60mm)

RockShox Super Deluxe Ultimate
(205x60mm)

FORK

RockShox Lyrik Base
(160mm)

RockShox Psylo Gold RC
(160mm)

RockShox Lyrik Select+
(160mm)

RockShox Lyrik Ultimate
(160mm)

Fox Float 36 Grip X2 Factory
(160mm)

HEADSET

FSA No.57E

STEM

RaceFace Aeffect R (40mm)

ANVL Swage (40mm)

HANDLEBAR

RaceFace Chester
XS/SM (800x20mm)
MD/LG/XL/XXL (800x35mm)

ANVL Mandrel Alloy 35
XS/SM (800x20mm)
MD/LG/XL (800x30mm)
XXL (800x40mm)

OneUp Carbon Bar
XS/SM (800x20mm)
MD/LG/XL/XXL (800x35mm)

GRIPS

ODI Elite Flow Lock-On

SADDLE

SDG Bel Air 3

SDG Bel Air 3 LUX

SEATPOST

SDG Tellis
XS (125mm)
SM (150mm)
MD (170mm)
LG (200mm)
XL/XXL (230mm)

OneUp Dropper Post
XS (120mm)
SM (150mm)
MD (190mm)
LG (210mm)
XL/XXL (240mm)

Fox Transfer Factory
XS (120mm)
SM (150mm)
MD (180mm)
LG (210mm)
XL/XXL (240mm)

BRAKES

Shimano Deore M6120 4 Piston

Shimano XT M8120 4 Piston

SRAM Maven Silver

ROTORS

Shimano RT66 (203mm)

Shimano RT86 (203mm)

SRAM HS2 (200/180mm)

SHIFTER

Shimano Deore M6100 iSpec EV

Shimano XT M8100 iSpec EV

SRAM POD Ultimate Bridge MMX

DERAILLEUR

Shimano Deore M6100 SGS 12sp

Shimano XT M8100 SGS 12sp

SRAM XO AXS Eagle Transmission

CASSETTE

Shimano Deore M6100 (10-51t)

Shimano XT M8100 (10-51t)

SRAM XS 1295 T-Type (10-52t)

CHAIN

Shimano Deore M6100

Shimano XT M8100

SRAM XO Eagle Transmission

CRANK

Shimano Deore M6100
(30t/165mm)

Shimano XT M8100
(30t/165mm)

SRAM XO Eagle DUB T-Type
(30t/165mm)

RIMS

WTB ST i30

DT Swiss M 1900 Spline 30

DT Swiss XM 481

SPOKES

Pillar Double Butted

DT Swiss Champion

DT Swiss Competition

HUBS

Novatech D791SB/D902SB

DT Swiss 370 Ratchet LN

DT Swiss 350 Classic DEG

TIRE/FRONT

Maxxis Assegai 3C EXO/TR (2.5)

Maxxis Assegai 3C EXO+ (2.5)

TIRE/REAR

Maxxis Minion DHRII 3C EXO/TR (2.4)

Maxxis Minion DHRII 3C EXO+ (2.4)

INCLUDED

Fidlock Twist Bike Base
Tubeless Valves & Sealant

Fidlock Twist Bike Base
SRAM AXS Battery Charger
Tubeless Valves & Sealant

Fidlock Twist Bike Base

COLOR OPTIONS

	Deep Purple
	Graphite Grey
	Glacier White

	Deep Purple
	Graphite Grey
	Glacier White

	Deep Purple
	Graphite Grey
	Glacier White

	Deep Purple
	Graphite Grey
	Glacier White

	Deep Purple
	Graphite Grey
	Glacier White

	Deep Purple
	Graphite Grey
	Glacier White

	Deep Purple
	Graphite Grey
	Glacier White

WEIGHT

33.6 lbs/15.21 kg (Size MD)

36.4 lbs/16.51 kg (Size MD)

34.4 lbs/15.58 kg (Size MD)

32.9 lbs / 14.92 kg (Size MD)

33.2 lbs/15.07 kg (Size MD)

9.91 lbs / 4.50 kg (Size MD)

7.41 lbs / 3.36 kg (Size MD)

Specs are subject to change at any time. All complete bikes are 95% assembled and packaged for quick and easy final assembly, and as such, Transition Bikes is not able to make special request build spec changes or modifications to packaging.

REFINING THE LEGEND
The new Sentinel may have a similar silhouette, but we've fully redesigned the frame with updated industrial design, features, and geometry to turn it up a notch. The leverage curve supports the bike higher in its travel, leaving plenty of room for big hits, while keeping it light on its feet to remain nimble and quick everywhere else. This gives it the lively, sporty attitude felt in the Spur and Smuggler without sacrificing its capabilities in rougher terrain. New size specific chainstays and a 64 degree headtube angle keep riders balanced with great traction on climbs and descents. All of this creates a bike that encourages new riders to push their limits, while ensuring a seasoned pro feels none.

REFINING THE LEGEND
The new Sentinel may have a similar silhouette, but we've fully redesigned the frame with updated industrial design, features, and geometry to turn it up a notch. The leverage curve supports the bike higher in its travel, leaving plenty of room for big hits while keeping it light on its feet to remain nimble and quick everywhere else. This gives it the lively, sporty attitude felt in the Spur and Smuggler without sacrificing its capabilities in rougher terrain. New size specific chainstays and a 64 degree headtube angle keep riders balanced with great traction on climbs and descents. All of this creates a bike that encourages new riders to push their limits, while ensuring a seasoned pro feels none.

REFINED DETAILS
We took a step back and looked for ways to improve the Sentinel, not just for the sake of change but for real, tangible steps forward that riders will feel and experience.

We added internal frame storage in the downtube of our carbon frame. The B.O.O.M. Box (Burritos Or Other Munchies) is positioned below and isolated from the water-bottle cage mount. This allows you to leave your bottle installed in your cage while easily getting into the B.O.O.M. Box, reducing clutter and fuss on the trail. It also prevents noise by not placing any weight on the door itself. With an easy access lever and two supplied gear bags, riders can stow away snacks, tools, a tube, or anything else they want to have along for the ride.

GEO-ADJUST FLIP CHIP
The lower shock mount has a geo-adjust flip chip to accommodate mixed wheels, and features a new design that allows water, dirt and debris to easily wash away. Low for 29" rear wheel, high for 27.5".

MUD GUARD
The Sentinel comes with a pre-installed mud guard to protect the main pivot area, improving the bearing life.

CHAINSTAY PROTECTOR
An all-new chainstay protector minimizes chain slap, so you can enjoy the sound of your favorite turns. The "pillow top" design features large rubber pillows that dampen sound and protect the chainstay.

CABLE PORTS
Cable ports on the side of the headtube allow for easy and simple cable routing with customizable options for mechanical or wireless shifting as well as left or right rear brake setups. The new port stops cables from getting kinked during a crash and holds them tight to prevent rattling. If you aren't using the port at all, simply cover it with the supplied insert to prevent dirt or water from getting inside your frame and keep a clean aesthetic. These ports help improve the looks of the frame while remaining functional and simple for maintenance.

Wheel Size Options
29" Wheels SM-XXL and mixed wheel compatible, dual 27.5 on XS.
160mm travel front, 150mm travel rear
The perfect amount of travel for going up and down mountains. Option to run 160mm rear travel with longer stroke shock.
B.O.O.M. BOX
In frame storage with supplied frame storage bags on carbon models.
64 degree headtube angle
Send-it-all with confidence and traction.
Size specific Chainstays
As the frame sizes grow, so do the chainstays to keep rider weight balanced on the bike.
Increased Size Range (XS-XXL)
The Sentinel is offered from XS-XXL.
Main Pivot Mud Guard
A pre-installed guard protects the main pivot area, improving the bearing life.
Carbon and Aluminum frame options
Available in 3 colors
Choose from Deep Purple, Graphite Grey, and Glacier White.
New Cable routing ports
Ports on the side of the headtube support different cable configurations for electronic or cable shifting while remaining simple for maintenance.
Refined Kinematics
The progressive leverage curve creates a lively nature that leaves plenty of room for big hits while keeping it light on its feet to remain nimble and quick everywhere else.

CARBON AND ALUMINUM FRAME OPTIONS
We want everyone to have the bike of their dreams, so we are offering the Sentinel in both carbon and aluminum. To make this bike as accessible as possible, we crafted the aluminum frame to remain simple, keeping costs and weight to a minimum. This means it does not have the B.O.O.M. Box, but does still have the flip chip and all other features found on the carbon frame. The aluminum frame is available with two build kits, Shimano Deore and XT, as well as frame only. The carbon frame is available in three build levels, Shimano Deore, XT, and SRAM X0 AXS as well as frame only. Each carbon build has the same high quality carbon construction including the B.O.O.M. Box and frame bags.

Speed Balanced Geometry SBG ensures the bike maintains low speed agility, front wheel traction, and proper rider weight balance while actually increasing confidence in steep terrain and at high speeds. With SBG, a slacker head tube angle is combined with a reduced offset fork standard, preventing the front wheel from being too far in front of the rider. This improves front to rear weight distribution on the bike, which is often out of balance on long and slack bikes. One of SBG's greatest benefits is that it creates a confident steering feel that adapts to wheel speed. More stability when going fast, more agility on technical slow speed maneuvering as well as improved traction, control and confidence for any skill level of rider.
	XS 27.5"	SM 29" \| MX	MD 29" \| MX	LG 29" \| MX	XL 29" \| MX	XXL 29" \| MX

A. REACH	415	430 \| 426	455 \| 451	480 \| 476	505 \| 501	530 \| 526

B. STACK	592	615 \| 618	621 \| 624	633 \| 636	642 \| 646	651 \| 655

C. CARBON EFFECTIVE TT LENGTH	527	549	577	605	632	660

ALLOY EFFECTIVE TT LENGTH	534	557	586	614	642	670

D. SEAT TUBE LENGTH	360	360	390	430	460	490

E. CARBON EFFECTIVE ST ANGLE	79.8°	79.3° \| 78.9°	78.7° \| 78.3°	78.3° \| 77.9°	77.9° \| 77.5°	77.6° \| 77.2°

ALLOY EFFECTIVE ST ANGLE	79.2°	78.7° \| 78.2°	77.9° \| 77.5°	77.3° \| 76.9°	76.8° \| 76.4°	76.5° \| 76.2°

SADDLE HEIGHT FOR EFFECTIVE ST ANGLE	560	600	660	720	780	820

CARBON SEAT TUBE OFFSET AT BB	69	69	69	69	69	69

ALLOY SEAT TUBE OFFSET AT BB	87	87	87	87	87	87

F. HEAD TUBE LENGTH	100	100	110	120	130	140

G. HEAD TUBE ANGLE	64°	64° \| 63.6°	64° \| 63.6°	64° \| 63.6°	64° \| 63.6°	64° \| 63.6°

H. CARBON CHAINSTAY LENGTH	436	442 \| 440	442 \| 440	448 \| 446	448 \| 446	448 \| 446

ALLOY CHAINSTAY LENGTH	434	442 \| 440	442 \| 440	446 \| 444	446 \| 444	446 \| 444

I. CARBON WHEELBASE	1173	1208	1237	1273	1302	1332

ALLOY WHEELBASE	1171	1208	1237	1271	1300	1330

J. BOTTOM BRACKET DROP	15	25 \| 11	25 \| 11	25 \| 11	25 \| 11	25 \| 11

K. ESTIMATED BB HEIGHT	340	350 \| 344	350 \| 344	350 \| 344	350 \| 344	350 \| 344
All measurements in degrees and millimeters

GIDDYUP
SUSPENSION
DESIGN

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 a subtle yet supportive end-of-stroke ramp. 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 60mm stroke shock. It is also possible to install a longer stroke shock of 205mm x 65mm to increase the rear wheel travel to 160mm.

A wide usable sag range of 26-33% 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.

"The Sentinel V3 remains true to its ride-everything identity while improving its climbing efficiency and responsiveness on low-angle trails. Still a capable descender that can hold its own on when things get gnarly, the Sentinel flourishes most on trails that maximize its maneuverability and fast handling. You tack on the new additions of mixed wheel compatibility, internal storage, updated chain slap protection, reworked cable routing, UDH on carbon frames, and a geometry flip chip, and the Sentinel V3 answers the wants of many past owners. Refined, not redesigned, looks pretty damn good."

Jason Schroeder / Vitalmtb.com FULL REVIEW HERE

"Since it was first launched, the Sentinel has represented exactly what you want in a trail bike, and the latest version continues the tradition: it's happy to pedal and climb all day long if you need it to, but it's all still in service of the descent. And when that time comes, the Sentinel delivers. Even if you get in a bit over your head, it has you covered. It won't replace the big bike for some, and it isn't pretending to, but it does a great job as a stand in. As far as trail bikes go, the Sentinel keeps its spot high on my list of favourites."

Pete Roggeman / nsmb.com FULL REVIEW HERE

"I think this bike is for the mountain biker — for the purist, the minimalist, the no-nonsense-ist. It's not full of fancy bells and whistles, no marketing gimmicks, no proprietary BS, and despite all that, it's a damn good bicycle. It's a mountain bike with ports to route your damn shifter cables if you want them. It takes that same mentality out to the trails. It goes uphill and downhill and doesn't pigeonhole itself into some tiny little niche. It's happy in all kinds of terrain and never gets in your way. It goes as hard or easy as you'd like, it's just happy to be outside in the woods."

Conor Barry / Bikers Edge FULL REVIEW HERE

"As far as a summary on the new Sentinel, I am extremely impressed by my first impressions and I'm hard pressed to pick apart a single low point. While many things appeal in terms of the bike's features, it was the improved ride quality - which stems from perfectly refined kinematics and razor sharp geometry - that really won me over."

Ian Collins / MTB-Mag Click here for the full review

Frame Specifications

REAR TRAVEL:	150mm (Compatible with 160mm)

FRONT TRAVEL:	160mm

WHEEL SIZE:	29" or MX (XS 27.5 only)

SIZES:	XS, SM, MD, LG, XL, XXL

FRAME BEARINGS:	2x 6903, 2x 6902, 4x 6802, 2x 3802, 2x 6900

FORK AXLE TO CROWN:	578mm (Includes headset) (XS 560mm)

FORK OFFSET:	44mm (XS 37mm)

REAR SHOCK SIZE:	205mm x 60mm (compatible with 205 x 65mm)

SHOCK HARDWARE:	Trunnion Mount Top / 30mm x 8mm Bottom

HEADSET (TOP):	44mm Zero Stack

HEADSET (BOTTOM):	56mm Zero Stack

BB SHELL:	73mm BSA Threaded

CHAINLINE:	52-55mm

REAR BRAKE MOUNT:	180mm Post Mount, Max Rotor Size 223mm

REAR AXLE:	Transition Axle For UDH, 12mm x 148mm Spacing

ISCG TABS:	ISCG05

SEATPOST DIAMETER:	31.6mm

SEAT CLAMP:	Carbon: 37.0mm Alloy: 34.9mm

MAX SEATPOST INSERTION:	Carbon: X-Small 245mm \| Small 245mm \| Medium 275mm \| Large 315mm \| X-Large 345mm \| XX-Large 375mm Alloy: X-Small 225mm \| Small 225mm \| Medium 260mm \| Large 310mm \| X-Large 325mm \| XX-Large 340mm

MAX CHAINRING SIZE:	34T Standard Single Ring

MAX TIRE SIZE:	29" x 2.5"

REAR SHOCK SAG:	150mm/60mm: 16-20mm (26-32%)

FAQ'S