Sentinel Alloy Eagle 90
OverviewAbout the Transition Sentinel Alloy Eagle 90
The Transition Sentinel Alloy Eagle 90 is a mountain bike, built on a aluminium frame, listed at $9,499.95. An off-road bike for trails, with grippy tyres and trail-ready geometry.
SizingWhat size Sentinel Alloy Eagle 90 do I need?
Enter your height to see the size we would start with.
| Size | Rider height | In feet |
|---|---|---|
| XS | 142 to 155 cm | 4 ft 8 in to 5 ft 1 in |
| S | 152 to 165 cm | 5 ft 0 in to 5 ft 5 in |
| M | 165 to 177 cm | 5 ft 5 in to 5 ft 10 in |
| L | 177 to 188 cm | 5 ft 10 in to 6 ft 2 in |
| XL | 188 to 198 cm | 6 ft 2 in to 6 ft 6 in |
Height is a starting point: arm and leg length, flexibility and riding style all matter, so a test ride beats any chart. How bike sizing works.
SpecificationsWhat we know
- Brand
- Transition
- Model year
- 2026
- Category
- Mountain
- Frame
- aluminium
- Wheel size
- 29-inch (mullet option)
- Drivetrain
- SRAM Eagle 90 Transmission, 1x12
- Brakes
- Disc
- Frame sizes
- XS, S, M, L, XL, XXL
- Price
- $9,499.95, RRP AUD (Lusty Industries, Australian distributor, checked 25 Oct 2026)
Specs and pricing are listed in AUD and sourced from Australian retail listings. Confirm the current details and availability with the seller before purchase.
GeometrySize M
- Stack
- 621 mm
- Reach
- 455 mm
- Stack/reach
- 1.36
- Head angle
- 64 deg
- Seat angle
- 77.9 deg
- Wheelbase
- 1237 mm
- Chainstay
- 442 mm
- BB drop
- 25 mm
- Standover
- 690 mm
- Fork rake
- 44 mm
GearingRatios
Ratios are derived from the chainrings and cassette. They describe the gearing, not any rider's ability.
Drivetrain & buildFull specification
- Groupset
- SRAM Eagle 90 Transmission
- Shifting
- Mechanical
- Drive
- 1x
- Speeds
- 12
- Crank
- SRAM Eagle 90 DUB, 165mm
- Chainrings
- 30t (29) / 32t (27.5)
- Cassette
- SRAM XS 1275 T-Type
- Rear derailleur
- SRAM Eagle 90
- Brakes
- SRAM Maven Silver
- Rotors
- SRAM Centerline 200mm front / 180mm rear
- Wheelset
- DT Swiss M 1900 Spline 30 rims, DT Swiss 370 Ratchet LN hubs, DT Swiss Champion spokes
- Rim internal width
- 30 mm
- Stock tyre
- Maxxis Assegai 3C MaxxGrip EXO+ 29x2.5 front, Maxxis Minion DHRII 3C MaxxTerra EXO+ 2.4 rear
- BB standard
- 73mm BSA threaded
- Thru-axle
- Transition axle, 12x148mm
- Seatpost
- OneUp Dropper Post (M 190mm)
- Cockpit
- Race Face Aeffect R 40mm stem, Race Face Turbine bar (M 780x40mm), ODI Elite Flow grips
- Saddle
- SDG Bel Air 3
- UDH
- Yes
SuspensionMTB detail
- Front travel
- 160 mm
- Rear travel
- 150 mm
- Fork
- RockShox Lyrik Ultimate 160mm
- Shock
- RockShox Super Deluxe Ultimate 205x60mm
- Wheel config
- 29
- Dropper
- OneUp Dropper Post
- Dropper travel
- 190 mm
- Discipline
- Enduro
- Suspension
- full suspension
Bike DNAWhat the numbers say
- Steering
- A 64 deg head angle points to very slack, built for steep descending.
- Climbing
- Lowest ratio 0.1 is a very low climbing gear for steep or loaded climbs.
Derived from the published geometry and gearing above. It describes the numbers, not a ride test.
BikeFinder Data Profile: geometry and specification researched from published sources (transitionbikes.com build and geometry tables; AUD RRP, sizes and wheel options from Lusty Industries variant data), verified 2026-10-25. This is a specification analysis, not a physical ride review.
Where to buyStockist
BikeFinder is an independent directory. We link to retailers; prices and stock are set by the seller and shown as at the date checked.
