Transition Regulator CX Carbon Eagle 90 E-Mountain Bike 2026
sku# 278251
Model Info
Transition Regulator CX Carbon Eagle 90 E-Mountain Bike 2026
sku# 278251
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Product Info
The Transition Regulator CX Carbon Eagle 90 E-Mountain Bike is what happens when Transition builds an e-bike on their own terms — no compromises, no excuses. Its Bosch Performance CX motor powers out 85Nm of torque through a mixed-wheel chassis with 150mm of travel and a geometry that prioritizes fun over brute force. The 600Wh battery is enough to keep the ride going all day, but you can add a 250Wh range extender if you plan on rolling back to the trailhead with a headlamp. It's more trail bike than e-bike, and that's exactly the point. This build features Rockshox suspension, SRAM Maven Silver brakes, and SRAM Eagle 90 T-Type drivetrain components for smooth shifting under load.
Product Details
Key Features
Carbon Fiber Frame – Lightweight and incredibly strong, Transition's carbon framesets are known for durability and versatility.
Travel – 160mm Front / 150mm Rear
Wheel Size – Mixed Wheel (29" Front / 27.5" Rear)
250wh Range Extender Compatible – MD-XL sizes only. Sold separately.
Bosch Wireless Two Button Mini Remote
Top Tube Mounted System Controller LED Display
Geo-adjust Chip at Lower Shock Mount
Specs
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Biking Type:
Mountain
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Biking Type
Mountain Mountain bikes are built for tackling rough terrain with frames made of durable materials like aluminum or carbon fiber, ensuring stability and maneuverability. They feature suspension to absorb impacts from rocks, roots, and drops, providing a smoother ride.
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Used For:
Trail
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Used For
Trail Trail bikes are the quintessential “mountain bikes.” If you’re heading into the woods expecting to do it all on two wheels – climbing, technical sections, AND fun descents – you’re looking for a trail bike.
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Suspension:
Full Suspension
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Suspension
Full Suspension Engineered to tackle the most challenging terrain with enhanced comfort and control. Unlike hardtail bikes, full suspension bikes feature both front and rear suspension systems that allow the wheels to move independently from the frame.
- Gearing: 1 x 12
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Frame Material:
Carbon
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Frame Material
Carbon Carbon is a composite frame material. Unlike metals, carbon is composed of fibrous strands woven into a grid and bonded with epoxy. Carbon is favored by many for its lightness and stiffness but its complexity in fabrication makes it the most expensive option.
- Water Bottle Mounts: 1
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Fork:
RockShox ZEB Ultimate
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Fork
RockShox ZEB Ultimate Long on travel, short on excuses, ZEB Ultimate is a whole new breed of fork designed to challenge the limits and take on the world’s toughest enduro tracks. An updated stiff 38mm chassis includes the new Charger 3 RC2 damper with vibration-killing ButterCup technology. RockShox's highest performing, athlete-proven technologies matched with premium style plays. - Stanchion Diameter (mm): 38
- Fork Travel (mm): 160
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Rear Shock:
RockShox Super Deluxe Ultimate
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Rear Shock
RockShox Super Deluxe Ultimate In it to win it? Super Deluxe Ultimate is the smart bet for the podium. Packed to the hilt with fine-tuning adjustments that meaningfully improve suspension performance, it’s the most advanced shock RocShox have ever made. Pioneering one of the most impactful innovations in damper history, the new RC2T damper allows for 100% independent High Speed and Low Speed Compression adjustments, rounding out an arsenal of elite technology.
Shock Adjustments - Separate and Independent Open and Threshold Pistons / Low Speed Compression Adjustment / Rebound Adjustment / Air Spring Pressure - Rear Travel (mm): 150
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Drive Unit:
Bosch Performance Line CX BDU38
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Drive Unit
Bosch Performance Line CX BDU38 The next generation Bosch Performance Line CX motor is quieter, lighter, and smaller than ever. More compact but no less powerful, it comes with a maximum torque of 85Nm. Choose between 4 standard modes and customize your ride in the Bosch Flow App. -
Battery:
Bosch PowerTube 600Wh
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Battery
Bosch PowerTube 600Wh Thanks to their range, long service life, intelligent battery management system and easy handling, Bosch Power Tube lithium-ion batteries are among the most modern on the market. All those decades of Bosch experience has paid off! -
Shifters:
SRAM Eagle 90 T-Type
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Shifters
SRAM Eagle 90 T-Type The feel, look and shift quality of the Eagle 90 Shifter
allow you to ride in a whole new way. Optimized
cable pull with a revised lever position for maximum
control. With a new T-Type cable actuation ratio,
Eagle 90 offers a higher quality of shift than any
previous mechanical system.
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Rear Derailleur:
SRAM Eagle 90 T-Type, 12-Speed
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Rear Derailleur
SRAM Eagle 90 T-Type, 12-Speed The Eagle 90 Transmission derailleur is the definitive
answer to how good a cable actuated derailleur can
be. It features an all-new T-Type cable actuation
ratio to provide the most precise and crisp shifts
every time. Utilizing the same Full Mount design
as its electronic siblings, Eagle 90 is the strongest
mechanical derailleur we have ever produced. Not
only is it robust, but the derailleur body features
replaceable outer and inner parallelogram links,
skid plate, and a tool-free threaded cage assembly,
making it the most rebuildable derailleur in the Eagle
Transmission Ecosystem. -
Crankset:
SRAM Eagle 90 DUB T-Type, 34t
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Crankset
SRAM Eagle 90 DUB T-Type, 34t The new Eagle 90 crankset is a sleek, sturdy answer
to a growing demand for robust and aesthetically
pleasing components. And with availability down to
shorter 155mm and 160mm lengths, it gives riders
more freedom to build their bike, their way. Featuring
8-bolt chainring compatibility, the Eagle 90 crankset
includes a silver stamped steel T-Type chainring
with optional bashguards for durability and protection
on the trail. - Cassette: SRAM XS 1275 10-52t
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Chain:
SRAM GX Eagle T-Type Flattop, 12-Speed
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Chain
SRAM GX Eagle T-Type Flattop, 12-Speed The GX Eagle Transmission (T-Type) chain is the strongest SRAM has ever made. Specifically engineered to optimize Eagle Transmission, this all-new T-Type design features a unique flat top. In addition to this shape maximizing shifting performance and upgrading the aesthetics of any bike, it is developed specifically for the added torque loads of E-MTB thanks to its solid pins that give it incredible strength. - Bottom Bracket: Included
- Pedals: Not Included
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Brake Levers:
SRAM Maven Silver
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Brake Levers
SRAM Maven Silver SRAM Maven Silver features monstrous 18 and 19.5mm pistons driving 50% more power than Code. But best-in-class power means nothing unless you’re able to harness it. The Maven Silver lever body houses Swinglink, which translates rider input for progressive power throughout the lever pull, maintaining SRAM’s signature ride feel. And because of a stiff 4-bolt caliper that sheds an incredible amount of heat, that feel remains consistent, so the last corner feels like the first corner. Maven Silver features a bold black anodized finish with stainless hardware. And for unrivaled ease of customization, features tool-free Reach and Contact Point Adjust. - Brake Calipers: SRAM Maven Silver
- Rotors: SRAM Centerline 200mm
- Headset: FSA NO.57E
- Stem: RaceFace Aeffect R 40mm
- Saddle: SDG Bel Air 3
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Seatpost:
OneUp Dropper
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Seatpost
OneUp Dropper Known for its no-nonsense smooth cable actuation, short overall length, and easy serviceability, the OneUp Dropper is a solid choice for dependable and customizable performance. - Hubs: Novatech D791SB/D902SB
- Rims: DT Swiss H 1900 Spline 30
- Spokes: DT Swiss Hybrid 370
- Tires: DT Swiss Hybrid 1
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Front Tire:
Maxxis Assegai 2.5" | 3C MaxxGrip, EXO+
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Front Tire
Maxxis Assegai 2.5" | 3C MaxxGrip, EXO+ Greg Minnaar’s signature tire – the Maxxis Assegai – provides tenacious, predictable grip across the entire profile no matter the lean angle. The Assegai can be used front and rear for a surefooted feel or as a front paired with a faster rolling rear tire.- 3C MaxxGrip: The stickiest, slowest rebounding rubber Maxxis offers.
- EXO+: Durable 60 TPI casing, legendary EXO puncture protection in the sidewalls, and a small butyl insert around the bead to protect from pinch flats and help prevent rim damage.
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Rear Tire:
Maxxis Minion DHR II 2.4" | 3C MaxxTerra, DoubleDown
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Rear Tire
Maxxis Minion DHR II 2.4" | 3C MaxxTerra, DoubleDown With side knobs borrowed from the legendary Minion DHF, but widened to provide more support, the DHR II corners like no other. The center tread features ramped leading edges to improve acceleration and sipes to create a smooth transition when leaning the bike. Paddle-like knobs on the center tread dig in under hard braking and help keep the bike under control.- DoubleDown (DD): Two layers of lightweight 120 TPI casing combined with a butyl sidewall insert creates a highly durable tire with more trail feedback than a Downhill casing tire.
| Size | S | M | L | XL |
| Rider Height | 5' - 5'6" | 5''4" - 6' | 5'9" - 6'3" | 6 - 6'7" |
| Reach (mm) | 425 | 455 | 480 | 510 |
| Stack (mm) | 623 | 632 | 641 | 651 |
| Effective Top Tube (mm) | 551 | 583 | 610 | 643 |
| Seat Tube (mm) | 375 | 400 | 440 | 470 |
| Head Tube Angle (°) | 64.5 | 64.5 | 64.5 | 64.5 |
| Seat Tube Angle (°) | 78.8 | 78.5 | 78.2 | 77.9 |
| Chainstay Length (mm) | 442 | 442 | 442 | 442 |
| Bottom Bracket Height (mm) | 350 | 350 | 350 | 350 |
| Bottom Bracket Drop (mm) | 25 | 25 | 25 | 25 |
| Head Tube Length (mm) | 105 | 115 | 125 | 135 |
| Wheelbase (mm) | 1201 | 1235 | 1271 | 1305 |
| Wheel Size | Mixed Wheel | Mixed Wheel | Mixed Wheel | Mixed Wheel |