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Today’s Deals2026 Transition
Sentinel Alloy Eagle 90
A 29″ aluminum frame full suspension enduro bike with ultra high-end components.
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Manufacturer Price
$5,499| Frame | Aluminum |
|---|---|
| Suspension | Full, 150 / 160mm |
| Fork | RockShox Lyrik Ultimate |
| Shock | RockShox Super Deluxe Ultimate |
| Wheels | 29″ Aluminum |
| Drivetrain | 1 × 12 |
| Groupset | Eagle 90 Transmission |
| Brakes | SRAM Maven Silver Hydraulic Disc |
| Seatpost | Dropper |
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.
Compare the full Sentinel model range
View Comparison5'0" – 5'7"
5'4" – 6'0"
5'8" – 6'3"
6'0" – 6'7"
🐐 Estimated
None yet.
Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.
Oct 2024
The latest iteration of Transition’s 150mm travel trail bike features in-frame storage and more balanced performance.
Oct 2024 · Peter Walker
We have tested the new and radical trail bike – the Transition Sentinel 2025 – for you.
Well-matched components
Cool detail updates
Inspires huge amounts of confidence downhill
Rear suspension is progressive and generates plenty of traction
Comfortable climber
Tight space around the BOOM Box
Oct 2024 · Ian Collins
In July I attended the launch of a new bike which I’ve given very high praise in its past iteration – the Transition Sentinel. Now in its third time around, the already highly versatile rig boasts updated geometry and improved kinematics as well as downtube storage, fully internal cable routing and a flip chip. I managed to get a few solid rides in on the new bike deep in the middle of Summer. Luckily, that coincided with a one-off rain storm that revitalized the local soil during an atypically dry Summer in Bellingham, Washington. The trails I rode included all
Oct 2024
The Sentinel has always been known as a trail bike that can be bent to fit different categories. The latest version continues the tradition.
Peddles and climbs well, improved leverage curve for better climbing
Excellent descending capability, stable at high speeds and rough terrain
Sensible spec choices and pricing
Updated industrial design, high quality and thoughtful details
Size-specific chain stays
In-frame storage (BOOM Box) with good design
Fidlock bottle mount included
Quiet bike with down tube and chain stay protectors
Cable ports on both sides for wired shifting and easy brake swaps
Mullet compatible with flip chip
Frame available in carbon and alloy, multiple build kits
DT Swiss M 1900 wheels are only adequate by weight
Frame-only pricing not the best value
Oct 2024 · Jessie-May Morgan
As is stock, it was provided with dual 29" wheels, with the 205mm x 60mm shock giving 150mm of rear wheel travel.
Oct 2024 · Tim Wild
I’m never going to threaten the podium at an enduro race — but the Transition Sentinel made me feel as if I could, and ride as if I should.
Super-nimble ride feel for such a large bike
Improved shock mount
Flip-chip allows for mixed wheel setup
Needs to be locked out to climb well
Might take some work to get the correct sizing
Seat clamp bolt could be recessed for weather protection
Oct 2024 · Singletrack Magazine
Transition Sentinel: 29er seeks adventurous riders for mutual outdoor fun. Sleek, sexy and BMX-y. 160mm up front, 150mm out back. Roving reporter Tim WIld tries out a 2025 Deep Purple Transition Se…
| Frame | Sentinel Alloy 150mm BB Standard: BSA, 73mm, Threaded Colors: Silver Mist; Desert Dusk |
|---|---|
| Fork | RockShox Lyrik Ultimate, (160mm) Travel: 160mm Spring Type: Air |
| Shock | RockShox Super Deluxe Ultimate, (205x60mm) Travel: 150mm |
| Bottom Bracket | 73mm BSA Threaded |
| Headset | FSA No.57E |
| Stem | Race Face Aeffect R (40mm) |
| Handlebar | Race Face Turbine, XS(760x20), SM(780x20), MD(780x40), LG/XL/XXL(800x40) |
| Saddle | SDG Bel Air 3 |
| Seatpost | OneUp Dropper Post, XS(120mm), SM(150mm), MD(190mm), LG(210mm), XL/XXL(240mm) Type: Dropper |
| Grips | ODI Elite Flow Lock-On |
| Rear Derailleur | SRAM Eagle 90 |
|---|---|
| Crank | SRAM Eagle 90 DUB, 29(30t/165mm), 27.5(32t/165mm) |
| Shifters | SRAM Eagle 90 MMX |
| Cassette | SRAM XS 1275 T-Type (10-52t) |
| Chain | SRAM GX Eagle Transmission |
| Chain Guide | ISCG05 |
| Brakes | SRAM Maven Silver Type: SRAM Maven Silver Hydraulic Disc |
| Rims | DT Swiss M 1900 Spline 30 |
|---|---|
| Spokes | DT Swiss Champion |
| Front Hub | DT Swiss 370 Ratchet LN |
| Rear Hub | DT Swiss 370 Ratchet LN |
| Tires | Front: Maxxis Assegai 3C, MaxxGrip EXO+ (2.5), Rear: Maxxis Minion DHRII, 3C MaxxTerra EXO+ (2.4) |
| Disc Rotors | SRAM Centerline (180/200mm) |
First added April 8
Last updated May 30