You may view the exploded frame detail and purchase replacement parts for your frame below. To verify you have the correct frame, please make sure your serial number has the same first 7 characters listed below.
SERIAL NUMBERS: TBC4341xxx, TBC4342xxx, TBC4340xxx,
Item Added To Your Cart
REF #
DESCRIPTION / PART #
# IN FRAME
STOCK LEVEL
PURCHASE QTY
ADD TO CART
PRICE/EA
0
Storage Zippered Bag P/N: 01.25.99.0029
1
All Available
$30.00
0
Storage Tool Roll P/N: 01.25.99.0030
1
All Available
$30.00
5
MAX Bearing: (6903) - Each P/N: 01.17.91.6903
2
All Available
$9.99
6
Main Pivot Spacer 17mm x 36mm (TRB-BSP-36L) - Each P/N: 01.22.92.0202
1
All Available
$6.00
7
Bearing Spacer and Water Shield 15mm x 27mm x 2mm (CEG-SPA) - Each P/N: 01.25.98.4314
2
All Available
$5.00
8
Main Pivot Axle 17mm x 80mm (TRB-MAX-80L) - Each P/N: 01.22.92.0201
1
All Available
$18.00
9
Main Pivot Taper Nut (A6DA-CCP) - Each P/N: 01.18.92.0205
1
All Available
$6.00
10
Main Pivot Spacer (6x10x1T) - Each P/N: 01.18.92.0203
1
All Available
$0.50
11
Main Pivot Screw (M6-25L-P-S) - Each P/N: 01.18.92.0202
1
All Available
$1.50
12
MAX Bearing: (6802) - Each P/N: 01.17.91.6802
6
All Available
$7.00
13
C-Clip 24mm (IRTW-24) - Each P/N: 01.20.92.0001
8
All Available
$2.00
14
Bearing Spacer 15mm x 23mm x 3mm (TRB-CWS) - Each P/N: 01.22.92.0004
8
All Available
$3.00
15
Chainstay Pivot Axle 15mm x 26mm V2 (TRB-CAX-26L) - Each P/N: 01.19.92.0101
2
All Available
$10.00
16
Chainstay Pivot Screw 12mm x 15mm V2 (TRB-SNT-15L) - Each P/N: 01.19.92.0102
2
All Available
$10.00
17
MAX Bearing: (6902) - Each P/N: 01.17.91.6902
2
All Available
$7.00
18
Bearing Spacer 15mm x 22mm x 3mm (TEDC-BWS) - Each P/N: 01.18.92.0004
2
All Available
$3.00
19
Rocker Pivot Screw 8mm x 40mm (MDEA-LBT) - Each P/N: 01.19.92.0303
1
All Available
$1.50
20
Rocker Pivot Axle 15mm x 38mm (TSCF-LAX) - Each P/N: 01.20.92.0301
2
All Available
$10.00
21
Seatstay Pivot Axle 15mm x 20mm (TRB-CAX-20L) - Each P/N: 01.20.92.0402
2
All Available
$10.00
22
Seatstay Pivot Screw 12mm x 12mm (TRB-SNT-12L) - Each P/N: 01.20.92.0401
2
All Available
$10.00
23
MAX Bearing: (6900) - Each P/N: 01.17.91.6900
2
All Available
$7.00
24
Trunnion Shock Spacer 10mm x 6mm (TSC-SWS) - Each P/N: 01.18.92.0005
2
All Available
$2.50
25
Trunnion Shock Bolt Washer V2 (TSCF-SCP) - Each P/N: 01.19.92.0508
2
All Available
$5.00
26
Trunnion Shock Bolt V2 10mm x 24mm (TSC-TRC-24L) - Each P/N: 01.19.92.0506
2
All Available
$10.00
27
Geo Adjust Chip V2 - Right (TSCF-LCP-R2) - Each P/N: 01.22.92.0503
1
All Available
$10.00
28
Geo Adjust Chip V2 - Left (TSCF-LCP-L2) - Each P/N: 01.22.92.0502
1
All Available
$10.00
29
Shock Bolt 8mm x 55mm (TRB-BT-55L-S) - Each P/N: 01.21.92.0501
Cable Guide Full Cover (TRF-07-HGFC) P/N: 01.25.98.4311
1
All Available
$5.00
50
Cable Grommet (Closed) - Each P/N: 01.25.98.4313
1
All Available
$5.00
50
Internal Cable Grommet - Each P/N: 01.14.98.2929
1
All Available
$8.00
51
Storage Door Assembly P/N: 01.25.99.0025
1
All Available
$22.00
52
Screw Bolt: M3x10L-M-SB P/N: 01.25.99.0028
4
All Available
$2.00
53
Storage Frame Insert P/N: 01.25.99.0026
1
All Available
$1.00
54
Storage Frame Wishbone P/N: 01.25.99.0027
2
All Available
$1.00
You may view the torque specs for your frame below. To verify you have the correct frame, please make sure your serial number has the same first 7 characters listed below.
SERIAL NUMBERS: TBC4341xxx, TBC4342xxx, TBC4340xxx,
REF #
DESCRIPTION / PART #
TORQUE / NOTES
8
Main Pivot Axle 17mm x 80mm (TRB-MAX-80L) - Each
19nm (Apply Grease To Shaft & Blue Threadlock To Threads)
9
Main Pivot Taper Nut (A6DA-CCP) - Each
(Apply Grease To Outer Surface)
11
Main Pivot Screw (M6-25L-P-S) - Each
10nm (Apply Blue Threadlock)
15
Chainstay Pivot Axle 15mm x 26mm V2 (TRB-CAX-26L) - Each
(Apply Grease To Shaft)
16
Chainstay Pivot Screw 12mm x 15mm V2 (TRB-SNT-15L) - Each
10nm (Apply Blue Threadlock)
19
Rocker Pivot Screw 8mm x 40mm (MDEA-LBT) - Each
(Apply Blue Threadlock)
20
Rocker Pivot Axle 15mm x 38mm (TSCF-LAX) - Each
15nm (Apply Grease To Shaft)
21
Seatstay Pivot Axle 15mm x 20mm (TRB-CAX-20L) - Each
(Apply Grease To Shaft)
22
Seatstay Pivot Screw 12mm x 12mm (TRB-SNT-12L) - Each
12nm (Apply Blue Threadlock)
26
Trunnion Shock Bolt V2 10mm x 24mm (TSC-TRC-24L) - Each
12nm (Apply Blue Threadlock)
29
Shock Bolt 8mm x 55mm (TRB-BT-55L-S) - Each
10nm (Apply Grease To Shaft & Blue Threadlock To Threads)
41
Screw Bolt: M4x10L-M-SB
1.5nm
42
37mm Bolt On Seatpost Collar (TRA-CLP) - Includes Screw
Grease bolt and torque to 6-7nm.
52
Screw Bolt: M3x10L-M-SB
1.5nm
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%)
WARRANTY POLICY
At Transition Bikes, we take pride in the quality of our products. Our frames are manufactured to withstand the rigors and abuse modern mountain bike trails can dish out. That said, anything can break given just the right amount of time, wear, or misfortune. Everyone here at Transition Bikes is committed to keeping you riding and we realize every warranty and or crash replacement situation is unique. You have our guarantee that we will do our best to make sure we keep you riding while limiting any downtime.
The V3 Sentinel, released in 2024, is covered for life against manufacturing defects. This policy applies to original owners only. Transition Bikes will repair or replace any original purchaser's individual frame parts or complete frame at our discretion.
If you did not purchase the bike directly from us, you must register your frame on our site with your serial number and provide proof of purchase to qualify for a warranty. In the event of an issue with your frame, Transition Bikes will determine whether it qualifies as a ‘Warranty Issue’ or is covered under our ‘Crash Replacement Policy’ (see below for details).
In the event that you have to send back all or part of your frame under warranty, you are responsible for the shipping costs to get it to us, and we will pay the return shipping.
*Our warranty policy does not cover:
Any labor costs associated to the warranty claim.
Modifications from stock configuration.
Normal wear-and-tear damage.
Paint damage caused by the removal of protective tapes or adhesives.
CRASH REPLACEMENT
In addition to our warranty, all Transition Bikes frames are covered for life under our “Crash Replacement Policy” to the original or second hand owner. If for any reason you should find yourself with a damaged frame, you may send us the broken frame section, and we will replace it for the best possible price we can, assuming we have the replacement part available. If we do not have the piece available, we will attempt to work out a crash replacement price on a replacement frame set. The customer is responsible for all shipping costs to get the frame to and from Transition Bikes.
WE GET IT, PEOPLE WHO RIDE OUR BIKES RIDE HARD
Above is our official stance, since to some degree these things need to be spelled out. But our entire philosophy is based around being a rider-owned company, and we take that seriously. We're well aware that not every circumstance can be accounted for, and not every case falls neatly into one of the above categories. We look at every warranty and crash replacement case with a fresh lens and treat every situation in the manner in which we would expect it to be handled. Our goal is to leave no rider who supports us without support in return.
WARRANTY/CRASH REPLACEMENT CLAIM FORM
To submit a Warranty/Crash Replacement Claim within the United States or Canada, you must have an account with us. To sign in to your existing account or create a new account, follow this link. Once you are signed in, click on Warranty Claims to submit a claim.
Our International Distributors handle warranty cases outside the United States and Canada. Please contact your region's distributor to get a claim started.
If you have any other questions regarding our warranty or crash replacement policies, please email us at warranty@transitionbikes.com or call us by phone, at (360) 230-8596.
Can I fit a water bottle on my Sentinel?
Sure!
Fidlock 450ml - All Sizes
Fidlock 590ml - SM through XXL
Fidlock 750ml compact - MD through XXL
Standard 22oz - MD through XXL
Standard 26oz - LG through XXL
Can I run a coil shock on this bike?
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
Can I run full-29 in the "high" setting / mixed wheels in the "low" setting?
Sure! Though the flip-chip is intended to correct the geo depending on rear wheel size (Low=29", High=27.5"), there's no reason you can't mix it up.
Can I try a bike before I buy?
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.
Do both the carbon and alloy versions feature frame storage?
No, only the V3 Sentinel Carbon has the BOOM Box.
How do I find tracking for my shipment?
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.
I want to run a coil shock, do you have a spring rate recommendation?
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.
What are the dimensions of the B.O.O.M. Box?
The frame storage opening is approximately two inches by six inches. The usable space inside the frame is approximately two inches tall by three inches wide, and runs the entire length of the downtube from the head tube to the bottom bracket shell.
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