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The Transition Sentinel combines 150/160mm travel, FOX Performance Elite suspension and Shimano XT Di2 for versatile all-mountain performance.
The Transition Sentinel combines 150/160mm travel, FOX Performance Elite suspension and Shimano XT Di2 for versatile all-mountain performance.
Transition

Transition Sentinel Carbon XT Di2 Mountain Bike 2027 in Glacier White

£6,999.00
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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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Hassle free returns

In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Transition Sentinel Carbon XT Di2 Mountain Bike 2027 in Glacier White

Season:2025

Brand:Transition

Code:THW2ID.TX.BRC.TNES.52.BC.

The Transition Sentinel is an all-mountain bike designed to say yes to just about every trail. Combining 150mm of rear travel with a 160mm FOX 36 fork, it strikes a balance between planted confidence on rough descents and the lively, responsive handling needed for technical climbs, jumps and flowing singletrack.

Refined suspension kinematics support the bike higher in its travel while retaining plenty in reserve for bigger impacts. A 64-degree head angle and size-specific chainstays help keep riders balanced and composed, while the geo-adjust flip chip allows compatible sizes to be converted from a 29" rear wheel to a mixed-wheel setup.

The carbon frame also incorporates Transition's B.O.O.M. Box downtube storage, refined cable routing, a main-pivot mudguard and a noise-damping chainstay protector. FOX Performance Elite suspension, wireless Shimano XT Di2 shifting, powerful XT four-piston brakes and DT Swiss wheels complete a capable build that's ready to Send-It-All.

Key Features & Benefits:

  • 150/160mm All-Mountain Suspension: 150mm of progressive rear travel and a 160mm FOX 36 fork provide a lively, supportive ride with the reserves for demanding descents and bigger hits.
  • Shimano XT Di2 Drivetrain: Wireless electronic XT shifting delivers fast, precise gear changes across a wide-range 10-51T 12-speed cassette.
  • B.O.O.M. Box Frame Storage: Integrated downtube storage on the carbon frame provides convenient space for tools, snacks and riding essentials, with two storage bags included.

Full Specification:

  • Frame: Sentinel Carbon, 150mm Travel, B.O.O.M. Box Internal Storage, Geo-Adjust Flip Chip, Size-Specific Chainstays
  • Rear Shock: FOX Float X Performance Elite, 205x60mm
  • Fork: FOX Float 36 GRIP X2 Performance Elite, 160mm Travel
  • Number of Gears: 12
  • Gear Shifters: Shimano XT Di2 SW-M8250
  • Chainset: Shimano XT FC-M8200, 165mm
  • Chainrings: 30T
  • Rear Cassette: Shimano XT CS-M8200-12, 10-51T
  • Chain: Shimano XT CN-M8100
  • Rear Derailleur: Shimano XT Di2 RD-M8250
  • Pedals: Not Supplied – Shop Pedals Here
  • Rims: DT Swiss XM 481
  • Front Hub: DT Swiss 350 Classic DEG
  • Rear Hub: DT Swiss 350 Classic DEG
  • Spokes: DT Swiss Competition
  • Front Tyre: Maxxis Assegai 3C EXO+, 29x2.5" (27.5" on XS)
  • Rear Tyre: Maxxis Minion DHR II 3C EXO+, 29x2.4" (27.5" on XS)
  • Brakes: Shimano XT BR-M8220 Four-Piston Hydraulic Disc
  • Rotors: Shimano RT86, 203mm
  • Handlebar: OneUp Carbon Bar; 800x20mm (XS, S), 800x35mm (M, L, XL, XXL)
  • Stem: ANVL Swage, 40mm
  • Seatpost: OneUp Dropper Post; 120mm (XS), 150mm (S), 190mm (M), 210mm (L), 240mm (XL, XXL)
  • Saddle: SDG Bel Air 3 LUX
  • Accessories: Shimano Di2 Battery Charger, Tubeless Valves & Sealant

Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.

Size Guide for Transition

SizeRider Height
X-Small (XS)143–158 cm (4'8"–5'2")
Small (S)153–168 cm (5'0"–5'6")
Medium (M)163–178 cm (5'4"–5'10")
Large (L)173–188 cm (5'8"–6'2")
X-Large (XL)183–198 cm (6'0"–6'6")
XX-Large (XXL)188–203 cm (6'2"–6'8")

Geometry for Transition Sentinel


SMMDLGXLXXL
XS29" | MX29" | MX29" | MX29" | MX29" | MX
27.5"
A. Reach415430 | 426455 | 451480 | 476505 | 501530 | 526
B. Stack592615 | 618621 | 624633 | 636642 | 646651 | 655
C. Carbon Effective Toptube Length527549577605632660
Alloy Effective Toptube Length534557586614642670
D. Seattube Length360360390430460490
E. Carbon Effective Seattube Angle79.8°79.3° | 78.9°78.7° | 78.3°78.3° | 77.9°77.9° | 77.5°77.6° | 77.2°
Alloy Effective Seattube Angle79.2°78.7° | 78.2°77.9° | 77.5°77.3° | 76.9°76.8° | 76.4°76.5° | 76.2°
Saddle Height For Effective Seattube Angle560600660720780820
Carbon Seattube Offset At Bottom Bracket696969696969
Alloy Seattube Offset At Bottom Bracket878787878787
F. Headtube Length100100110120130140
G. Headtube Angle64°64° | 63.6°64° | 63.6°64° | 63.6°64° | 63.6°64° | 63.6°
H. Carbon Chainstay Length436442 | 440442 | 440448 | 446448 | 446448 | 446
Alloy Chainstay Length434442 | 440442 | 440446 | 444446 | 444446 | 444
I. Carbon Wheelbase117312081237127313021332
Alloy Wheelbase117112081237127113001330
J. Bottom Bracket Drop1525 | 1125 | 1125 | 1125 | 1125 | 11
K. Estimated Bottom Bracket Height340350 | 344350 | 344350 | 344350 | 344350 | 34

Warranty Information for Transition:

ALL Transition frames are covered by our Unlimited Rider Support program. This program keeps you riding by providing discounted replacement frame parts or repair assistance in the event of damage - regardless of how it happened, or whether you're the original or a secondhand owner. If we are unable to replace or repair your frame part, we will work with you to find a suitable solution.
For full warranty policy please visit transition.com

Technical Information
  • Frame
    Sentinel Carbon 150mm
  • Wheel size
    29" (X-Small 27.5")
  • Rear shock
    Fox Float X Performance Elite (205 x 60 mm)
  • Fork
    Fox Float 36 Grip X2 Performance Elite (160 mm)
  • Headset
    FSA No.57E
  • Stem
    ANVL Swage (40mm)
  • Handlebar
    OneUp Carbon Bar XS/SM (800 x 20 mm) MD/LG/XL/XXL (800 x 35 mm)
  • Grips
    ODI Elite Flow Lock-On
  • Saddle
    SDG Bel Air 3 LUX
  • Seatpost
    OneUp Dropper Post XS (120 mm) SM (150 mm) MD (190 mm) LG (210 mm) XL/XXL (240 mm)
  • Brakes
    Shimano XT BR-M8220 4 Piston
  • Rotors
    Shimano RT86 (203 mm)
  • Shifter
    Shimano XT Di2 SW-M8250
  • Derailleur
    Shimano XT Di2 RD-M8250
  • Cassette
    Shimano XT CS-M8200-12 (10-51T)
  • Chain
    Shimano XT CN-M8100
  • Crank
    Shimano XT FC-M8200 (30T/165 mm)
  • Rims
    DT Swiss XM 481
  • Spokes
    DT Swiss Competition
  • Hubs
    DT Swiss 350 Classic DEG
  • Tyre/Front
    Maxxis Assegai 3C EXO+ (2.5)
  • Tyre/Rear
    Maxxis Minion DHRII 3C EXO+ (2.4)
  • Included
    Shimano Di2 Battery Charger Tubeless Valves & Sealant
  • Colour options
    Glacier White Graphite Grey Deep Purple
Sizing Information
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