YT DECOY MX CORE 4 Bosch CX Gen5 800Wh Bolt Black Magic

YT DECOY CORE 4 — Flagship Firepower

The all-new DECOY CORE 4 is YT’s premier e-enduro weapon, engineered for riders who demand the absolute best. It delivers 180mm front / 170mm rear travel via FOX Factory suspension paired with the class-leading Bosch Performance CX motor (100Nm, 750W peak) and massive 800Wh battery. This gravity-focused platform features an Ultra Modulus carbon chassis, X0 Eagle Transmission, carbon Renthal cockpit, DT Swiss HXC1500 carbon wheels, and SRAM Maven Silver brakes. From bike park hits to alpine descents, the CORE 4 is built to dominate every zone, every day. No compromise, no limits — this is the DECOY at full power.

Decoy Core 4 — Specifications

• Frame:
  Ultra Modulus Carbon Frame V4L | 170 mm rear travel | 148 x 12 mm YT Thru Axle

• Fork:
  FOX 38 Float Factory 29" | 180 mm travel | Grip X2 damper | 110 x 15 mm | 44 mm Offset

• Shock:
  FOX X2 Factory | 230 x 65 mm | H/LSC + H/LSR | Tune: CL20RL70

• Drive Unit:
  Bosch Performance Line CX | 85 Nm | 600 W Peak Power (unlock via app to 100 Nm / 750 W)

• Battery:
  Bosch PowerTube 800 | Integrated | 800 Wh | 36 V | 4A Charger

• Controller:
  Bosch Kiox 400C | USB-C | ANT+ | Bluetooth | Flow App | Navigation

• Headset:
  ACROS AZA-1370S / 1113S-BL ZS56 ZS56 | Stainless Steel Bearings | Block Lock 150° (Size S only) | Custom High Cap | 2 x 5 mm Spacers

• Stem:
  Renthal Apex 35 | 40 mm | +/-6° | Custom Black

• Handlebar:
  Renthal Fatbar 35 | 800 mm width | 7° Back | 5° Up | 40 mm Rise | Custom Black

• Grips:
  ODI Elite Motion V2.1 Lock-On

• Crankset:
  SRAM X0 Eagle Transmission BOSCH | 160 mm | BDU38 | Black

• Chainring:
  SRAM XX Eagle Transmission | 36T | Direct Mount | T-Type

• Chainguide:
  MRP SL Custom SL Slider | Bosch BDU38 | 34–36T compatible

• Cassette:
  SRAM X0 Eagle Transmission | 10–52T | XS-1295 Black | T-Type | 12-Speed

• Derailleur:
  SRAM X0 Eagle Transmission | 12-Speed | T-Type | AXS

• Shifter (Rear):
  SRAM POD Ultimate Controller | 2 Button Concave | Discrete Clamp

• Wheelset:
  DT Swiss HXC 1500

  • Front: 29" | 30 mm | 110 x 15 mm | 6-Bolt

  • Rear: 27.5" | 30 mm | 148 x 12 mm | 6-Bolt | XD

• Tires:

  • Front: Continental Kryptotal-Fr | 29” x 2.4 WT | Super Soft | Enduro

  • Rear: Continental Kryptotal-Re | 27.5” x 2.4 WT | Soft | Enduro

• Brakes:
  SRAM Maven Silver

  • Rotors: 220 mm (front) / 200 mm (rear) | Metal Sintered Pads

• Seatpost:
  YT Postman V2 Dropper w/ SRAM Dropper Lever MMX

  • Drop:

    • 150 mm (S)

    • 170 mm (M)

    • 200 mm (L–XL)

    • 230 mm (XXL)

  • Diameter: 34.9 mm

  • Adjustable drop: 20 / 10 / 5 mm

• Saddle:
  SDG Bel Air 3.0 | 140 mm | Lux-Alloy Rail | YT Custom Design

• Colour Options:
  Platinum White
  BlackMagic

• Sizes Available:
  S / M / L / XL / XXL

• Weight:
  23.2 kg (Size L, tubeless setup, no bottle or pedals)

The ALL NEW DECOY MX Geometry

Measurements: millimeters (mm)
Flip Chip position: Regular (Head Angle is 63.5 in the LOW position)

Frame size, guideline for best fit
• S: 154 cm - 165 cm // 5'1" - 5'5"
• M: 163 cm - 175 cm // 5'3.5" - 5'9"
• L: 173 cm - 184 cm // 5'8" - 6'0.5"
• XL: 182 cm - 193 cm // 6'0" - 6'4"
• XXL: 193 cm - 202 cm // 6'3.3" - 6'7.5"

Bosch Smart System Specs

• Drive Unit: Bosch Performance CX (85 Nm, 600W peak, unlock to 100Nm / 750W)

• Battery: Bosch PowerTube 800 (800Wh)

• Display/Controller: Bosch Kiox 400C w/ USB-C, Flow app, Bluetooth, ANT+, navigation

Kinematics Snapshot

• Pedal Kickback (36T / 10-51T): Starts around 23° and drops to ~2° as travel increases

• Anti-Squat: Starts ~135% at sag, decreasing steadily with travel

• Anti-Rise: Consistent ~65–80%

• Leverage Ratio: Progressive, starting ~3.3 and descending to ~2.1 through 160 mm travel

In a nutshell: The CORE 4 is the top-spec YT Decoy built to win — or just ride like it. With FOX’s Factory suspension, carbon DT Swiss wheels, Bosch’s most powerful drive unit, and SRAM’s top-tier wireless Transmission, this is the premium eMTB for the rider who wants it all.

Tech Highlights: FOX 38 Factory GRIP X2 | FOX X2 Factory | Bosch Performance CX (100Nm) | 800Wh Battery | SRAM X0 Eagle AXS Transmission | DT Swiss HXC1500 Carbon Wheels | SRAM Maven Silver Brakes | Renthal Carbon Cockpit

FAQs

• Is this the lightest Decoy model?
  Yes , thanks to carbon wheels and Renthal components, the CORE 4 is the lightest in the lineup.

• Can I tune the motor with the app?
  Yes, the Bosch Flow App lets you customize support levels, monitor ride stats, and plan routes via Komoot.

• Are the wheels tubeless-ready?
  Absolutely. All models ship tubeless-ready; just add the tubeless valves + sealant and you're good to go.