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.
AVAILABLE COLORS:
TI GREY (CARBON ONLY)
LOAM GOLD (CARBON ONLY)
SELECT BUILD
Sentinel Carbon Frameset
$3,699 $2,299 USD
SELECT SIZE/COLOR
X-Large
Ships Now
X-Large
Ships Now
$3,699
$2,299
USD
IN STOCK: This item will ship within 2 business days
AVAILABLE FOR PREORDER
This item is currently unavailable for online ordering.
If you'd like to purchase this item from a local Transition dealer, use this dealer locator tool and reach out to them to see what options are available.
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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.
SM
MD
LG
XL
XXL
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°
SADDLE HEIGHT FOR EFFECTIVE ST ANGLE
600
660
720
780
820
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
Frame Specifications
REAR TRAVEL:
150mm (Compatible with 140mm)
FRONT TRAVEL:
160mm
WHEEL SIZE:
29"
SIZES:
SM, MD, LG, XL, XXL
COLORS:
Carbon: Loam Gold, Ti Grey
Alloy: Cascade Blue, Platinum Silver
FRAME BEARINGS:
2x 6903, 2x 6902, 4x 6802, 2x 3802, 2x 6900
FORK AXLE TO CROWN:
574mm (Includes headset)
FORK OFFSET:
42-44mm
REAR SHOCK SIZE:
205mm x 62.5mm (Compatible with 205mm x 57.5mm)
SHOCK HARDWARE:
Trunnion Mount Top / 25mm x 8mm Bottom
HEADSET (TOP):
44mm Zero Stack
HEADSET (BOTTOM):
56mm Zero Stack
BB SHELL:
73mm BSA Threaded
CHAINLINE:
52mm
REAR BRAKE MOUNT:
180mm Post Mount, Max Rotor Size 203mm
REAR AXLE:
Carbon: Syntace X12 148, 1.0mm Thread Pitch
Alloy: 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: Small 220mm | Medium 250mm | Large 290mm | XL 320mm | XXL 350mm
Alloy: Small 240mm | Medium 270mm | Large 310mm | XL 335mm | XXL 360mm
Yes, this frame comes with ISCG05 tabs. If using a chain guide the rubber cable guide plug is not needed.
For customers ordering directly off our website, we are no longer accepting pre-orders due to uncertainty in global supply chains and production and with ETAs continually changing. However, we have added a "Notify me when this item is back in stock" feature for all our models. Just click the model, build kit, color and size you'd like then click on the notify me button and add your email. Once that bike arrives and is available for purchase you will receive an email notifcation.
Yes. This bike is designed to work with both air and coil shocks. We know there are a lot of great shock options outside of what we spec, but we have worked extremely hard to develop the tune in our supplied shocks. We believe they perform as good as anything else available in the aftermarket options.
Transition Bikes is not responsible for any damage to a frame caused by a shock that we do not spec. To verify shock fitment please email us at info@transitionbikes.com
Yes. Running 10mm more or less travel than stock is okay. Any more than 10mm in either direction can negatively affect the handling.
Yes, but this bike is built with SBG technology, which utilizes an offset in the range of 42-44mm. Running a fork with more or less offset would be taking away from the SBG technology package.
We offer three ways to demo a bike. If you find yourself in Bellingham, you can follow this link to schedule a demo through the Outpost. If you live somewhere else, you can follow this link to see what shops currently have demo bikes available. And finally, you can view our events page, located here to see which upcoming demo events we'll be participating in.
We provide easy and affordable financing through our partner, Bread, so you can pay for your purchase over time.
Sizes MD-XXL will fit a standard sized water bottle. Size SM will fit a 15oz/450ml Fidlock water bottle
If you have not received an email confirming your tracking number, you can find it by going to your "Order History" once logged in. There you'll see the invoice number, date shipped, shipping carrier, and tracking info, if available. You'll be able to click on the tracking info and be re-directed to the shipping carrier's website. See below for an example.
If you order directly from us you can watch this video to see how the bike will arrive to you. There is very little assembly required. If you order it through one of our local dealers, then the bike will come assembled and ready to ride.
This bike uses the Enduro MAX Bearing Kit For Trunnion Mount Frames (2018-2023) - Part Number 01.18.91.6840
We do not have a spring rate chart or recommendation for this model. Please reach out to the shock manufacturer or use the spring rate calculator here.
This frameset is covered for life against manufacturing defects for the original owner and comes with a lifetime crash replacement policy. You can read more about our warranty and crash replacement policy on our Support Page.
Looking for a little giddy-up in your life, but not sure what size you need? Take a look at our human specific sizing guide located here.
Visit our Support Page to see the torque specs and more information about the Sentinel.
DON'T BE A STRANGER, STAY CONNECTED
TRANSITION HQ
5090 Samish Way
Bellingham, WA 98229 USA
(360) 366-4960
info@transitionbikes.com
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TI GREY (CARBON ONLY)
LOAM GOLD (CARBON ONLY)
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