Overview
The YT Decoy is YT Industries’ full-power eMTB, built around the Bosch Performance CX Gen5 motor with 100Nm of torque and a massive 800Wh integrated battery. With 180mm of front travel and 170mm of rear travel in a MX (29/27.5) wheel configuration, the Decoy is designed as an enduro-capable eMTB that can handle the most demanding terrain while providing motor-assisted climbing power to reach it. The Ultra Modulus carbon frame is engineered specifically for eMTB duty, with reinforced motor and battery mounting points.
New to bike geometry? Our complete guide to mountain bike geometry explains every measurement and what it means for your riding. You can also learn how to read a geometry chart to compare this bike against other models.
The Decoy’s geometry is aggressive and modern: a 64.5° head angle in the slack flip chip position, seat tube angles around 75.5–76.0°, and reach spanning approximately 409mm (S) to 489mm (XXL). The MX wheel setup — 29-inch front and 27.5-inch rear — provides excellent rollover at the front with a lower, more maneuverable rear end. Chainstay length is a consistent 442mm across all sizes, and the BB height sits around 344mm. The 800Wh battery is one of the largest in the eMTB market, providing extended range for long days in the mountains.
Geometry Diagram
Geometry Table
| Measurement | S | M | L | XL | XXL |
|---|---|---|---|---|---|
| Head Tube Angle | 64.5° | 64.5° | 64.5° | 64.5° | 64.5° |
| Seat Tube Angle (eff.) | 76.0° | 76.0° | 75.8° | 75.5° | 75.5° |
| Reach | 409mm | 429mm | 449mm | 469mm | 489mm |
| Stack | 616mm | 625mm | 634mm | 643mm | 652mm |
| Wheelbase | 1184mm | 1209mm | 1234mm | 1259mm | 1284mm |
| Chainstay Length | 442mm | 442mm | 442mm | 442mm | 442mm |
| BB Height | 344mm | 344mm | 344mm | 344mm | 344mm |
| Head Tube Length | 85mm | 95mm | 105mm | 115mm | 125mm |
| Seat Tube Length | 380mm | 410mm | 440mm | 465mm | 490mm |
Geometry Analysis
The Decoy’s 64.5° head angle strikes a balance between stability and agility — it’s slacker than most trail-oriented eMTBs but not as extreme as dedicated gravity machines. For an eMTB with 170mm of rear travel, this positions the Decoy as a versatile all-terrain machine rather than a pure descender. The seat tube angles (75.5–76.0°) are more relaxed than the analog Jeffsy’s, which is typical for eMTBs where the motor assists climbing regardless of rider position. Reach figures are moderate, with the L at 449mm — slightly shorter than the equivalent Jeffsy size, reflecting the different riding dynamics of an eMTB where the motor compensates for less aggressive cockpit positioning. The consistent 442mm chainstays provide a balanced, predictable rear end across all sizes. Note: S, M, and L geometry figures are extrapolated from confirmed XL and XXL data, following YT’s consistent 20mm reach increments.
Ride Characteristics
The Decoy transforms what’s possible on a mountain bike. The Bosch CX Gen5 motor delivers 100Nm of torque — among the most powerful in the eMTB market — making even the steepest climbs feel manageable. The 800Wh battery provides genuinely all-day range, with most riders getting 3–5 hours of mixed riding before needing a charge. On descents, the MX wheel configuration and 170mm of rear travel create a confidence-inspiring platform that handles rough terrain beautifully. The 29-inch front wheel rolls over obstacles easily, while the 27.5-inch rear provides a more responsive, playful feel in corners and on technical terrain. The extra weight of the motor and battery (total bike weight approximately 50+ lbs) actually benefits descending by adding stability and traction. The Decoy rides remarkably well for an eMTB, with suspension that feels active and controlled rather than wallowing under the extra weight.
Key Specs
Frame: Ultra Modulus Carbon. Wheel Size: MX (29″ front / 27.5″ rear). Travel: 180mm fork / 170mm rear. Motor: Bosch Performance CX Gen5, 100Nm, 750W peak. Battery: 800Wh integrated. Sizes: S, M, L, XL, XXL. Flip Chip: ±0.5° HA adjustment. Drivetrain: SRAM GX/X0 Eagle Transmission. Brakes: SRAM Code, 220/200mm rotors. Fork: FOX 38 / RockShox ZEB. Weight: ~50+ lbs (varies by build).
What’s New vs Previous Generation
The 2025 Decoy is a major update featuring the Bosch Performance CX Gen5 motor system (100Nm torque, up from 85Nm on the previous generation’s Shimano EP8 motor). The 800Wh battery is also a significant upgrade, providing substantially more range. The frame is entirely new with an Ultra Modulus carbon construction designed specifically around the Bosch motor platform. Geometry has been updated with modern numbers including the 64.5° head angle and longer reach figures. The MX wheel configuration (29/27.5) is now standard across the range, and the flip chip provides ±0.5° of head angle adjustment.
Who Should Consider This Bike
The Decoy is ideal for riders who want to maximize their time on technical descents without the physical toll of climbing under their own power. It’s excellent for riders returning from injury, those who want to keep up with faster friends, or anyone who simply wants to ride more trail per day. The Bosch CX Gen5 motor and 800Wh battery make it particularly well-suited for long mountain days with significant elevation gain. The enduro-level travel and geometry also make the Decoy a great choice for riders who want an eMTB that genuinely descends as well as it climbs.
Comparable Models
The Decoy competes with the Specialized Turbo Levo (150/160mm, Specialized 2.2 motor), Trek Rail (150/160mm, Bosch CX), Santa Cruz Bullit (170/170mm, Shimano EP8), Yeti MTe (165/170mm, TQ HPR60), and Norco Sight VLT (discontinued). The Decoy’s 170mm of rear travel and Bosch CX Gen5 motor place it at the more aggressive end of this group. The 800Wh battery is among the largest available, providing a range advantage over competitors with smaller batteries. YT’s direct pricing delivers significantly better specs per dollar than most retail competitors in the eMTB segment.
Related Geometry
More YT geometry: YT Capra 2025 Geometry, YT Capra 27.5 2020 Geometry, YT Capra 29 2020 Geometry, YT Decoy 27.5 2020 Geometry, YT Decoy 29 2020 Geometry.
Compare emtb bikes: 2023 Giant Reign E+ Geometry, 2023 Giant Stance E+ Geometry, 2023 Giant Trance E+ Geometry.
Frequently Asked Questions
What motor does the YT Decoy use?
The 2025 Decoy uses the Bosch Performance CX Gen5 motor, which produces 100Nm of torque and 750W of peak power. This is one of the most powerful motors available in the eMTB market.
What is the battery size on the YT Decoy?
The Decoy features an 800Wh integrated battery, one of the largest in the eMTB market. This provides approximately 3–5 hours of mixed riding depending on assist level, terrain, and rider weight.
What wheel size does the YT Decoy use?
The Decoy uses a MX (mixed/mullet) wheel configuration with a 29-inch front wheel and 27.5-inch rear wheel. This provides excellent rollover at the front with quicker, more playful handling at the rear.
How much does the YT Decoy weigh?
The Decoy weighs approximately 50+ lbs (23+ kg) depending on the build and size. This is typical for a full-power eMTB with an 800Wh battery and is heavier than lighter eMTB platforms that use smaller motors and batteries.
Can the YT Decoy be ridden with the motor off?
Yes, but at 50+ lbs, the Decoy is very heavy to pedal without motor assistance. The Bosch CX motor has minimal drag when turned off, but the weight makes unassisted riding impractical for anything other than short distances. The motor is designed to always be used.