A 29″ / 27.5″ carbon frame full suspension enduro e-bike with upper mid-range components. Compare the full range
|Travel||165mm rear, 170mm front|
|Fork||Fox Performance Elite Float 38|
|Wheels||29″ / 27.5″ Aluminum|
|Drivetrain||1 × 12|
|Motor||Shimano 250W 85Nm mid-drive|
For This Bike
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more →
5'0" – 5'5"
5'4" – 5'9"
5'7" – 6'1"
5'10" – 6'4"
6'2" – 6'7"
Alan MuldoonApr 2023
Say hello to the 2023 YT Decoy Core 4 MK 1.35. Okay, so the MK1.35 tag isn’t part of its official title, we added that ourselves. But seeing as YT has managed to increase the potential battery capacity from 540Wh to 720Wh (which is a 35% increase) without having to make wholesale changes to the frame, we think it’s a rather fitting addition. Need to know: A flip-chip in the rearward shock mount offers high and low geometry settings Tested here with the new 720Wh battery, but the bike ships with the old 540Wh battery Mixed wheelsize Full carbon frame comes in five sizes – S to XXL Fox Factory suspension has all the adjustability you need and then some How did YT squeeze in the extra juice without messing up the handing of our e-bike of the Year winner in 2021? It completely redesigned the battery, while maintaining the same fittings and mounting architecture. So yes, the new 720Wh battery is backwards compatible with all Decoy models, bar the size S. It’s currently only available as a standalone product for £899, which, as e-bike batteries go, is competitively priced. Best of all, the potbelly profile of the 720Wh battery allows YT up the cell count while keeping the extra weight as low and central in the bike as possible. On our scales the 720Wh battery weighed 4.57kg, which is 860g heavier than the stock 540Wh battery, and increased the weight of the stock Decoy Core 4 from 23.32kg to 24.18kg. Still pretty competitive, but not as light as you might expect for a full carbon frame and high-end build kit that wants for nothing. Still it’s a moot point as all current Decoys ship with 540Wh batteries as standard, but we’re confident that YT will roll out the bikes with the new battery in the not too distant future. Other than the bigger battery option then, it’s business as usual since we last tested the Decoy. It’s still available in MX (170/165mm travel) and full 29in (150/145mm travel) options and it’s designed around the Shimano Steps EP8 motor, with the smaller, monochrome SE E7000 display. The frame is available in five sizes XS to XXL and while the sizing on the Decoy isn’t the most generous, the size L sporting a rather demure 451mm reach, the Decoy feels all the more manageable and manoeuvrable for it. Also the 50mm stem ensures that the fit never feels cramped, and even slows the steering response down a hair to make it easier to correct course mid turn. Suspension As the flagship bike in the Decoy range, the Core 4 get’s Fox Factory level suspension components, bling Kashima coating and all. The 170mm Fox 38 fork and X2 shock both offer 4-way adjustable damping, so if you want a flatter, more stable ride to the Decoy it is relatively easy to achieve by simply cranking up the compression damping. However, we think the Decoy feels best with a lighter more active approach …Continue reading »
720Wh battery means more fun, reactive ride, premium build components
720Wh battery means more money
Ron KochJun 2022
If you like to stay planted to the trail, stable at high speed and want to plow through rough singletrack, the YT Decoy MX is a whole lot of good times.
The YT Decoy MX shreds corners, likes to jump, and it has a comfortable and well rounded suspension tune. It's a fun bike all around! Read more now!
Alex EvansMay 2022
A poppy and playful ride that offers addictive fun, but comes at the expense of outright speed and stability
EXO+ casing tyres
Ian CollinsMar 2022
For the last few months I've been ripping around on YT's Decoy MX Core 3. It's the first mixed wheel e-bike that I've ridden
Jonas MüssigMar 2022
With its powerful Shimano EP8 motor, 540 Wh battery and capable suspension, the YT DECOY MX CORE 4 stands for uncompromised trail fun. But is it just a mean downhill machine or can it impress with its all-round qualities? To find out, we pitted the YT DECOY MX CORE 4 against the most exciting bikes of the season in our big 2022 eMTB group test.
High fun-factor on flowing trails and jumps
Excellent comfort for long rides
Short-travel dropper post
Tires with fragile casing
Long seat tube restricts choice of frame size
Jeremy BensonMar 2022
The sleek-looking YT Decoy 29 Core 4 checks nearly all of our boxes and is among the best eMTBs we've tested. With 29-inch wheels, 150/145mm of front/rear...
La PataNov 2021
Plenty of range for plenty of good times.
Eats up the steep, nasty downhills
Battery life and performance
FOX Factory suspension is a solid performer
Parts to price/Value
Faster is more fun
Shimano E-Tube app
Struggles on techy climbs
Not an easy jumper
Sluggish in sprints
Voluminous, EXO rear tire
FOX 38 PERFORMANCE ELITE, 29“ | 170 mm Travel | 110 x 15 mm Axle | 51mm Offset Grip2 Damper, Adjustable High- and Low-Speed Compression and Rebound, Air Pressure
FOX FLOAT X PERFORMANCE ELITE, Shock Length: 230 mm | Shock Stroke: 65 mm ≙ 165 mm Travel | 2pos-Adjust | Custom Tune Adjustable Low-Speed Compression, Adjustable Low-Speed Rebound, Air Pressure
ACROS AZX-260, Block Lock I High Cap I 2 Spacer 5 mm I Flatcapset
E13 Plus 35, Length 50 mm | 35 mm Clamp | Rise 0° | 7050 AL
E13 Plus 35, Rise 35 mm | Width 800 mm | 9° Back Sweep | 5° Up Sweep | 7050 AL
SDG BEL Air 3.0, YT Custom | Width 140 mm I Lux-Alloy Rail
YT POSTMAN, Ø 31.6 mm | 125 mm Drop (Frame Size S-M) | 150 mm Drop (Frame Size L) | 170 mm Drop (Frame Size XL-XXL) | MMX-Remote
ODI ELITE MOTION V2.1, Lock On
SHIMANO SLX, M7100 | Shadow Plus | 12-fach
SHIMANO EM600, Crank Arm Length 160 mm
SHIMANO SLX, M7100 I 12-speed I 2-Way-Release
SHIMANO SLX, M7100 | 10-51T | 12-speed I Hyperglide+
E13 e*SPEC Plus, 2 Bolt | 34-38T | Compact Slider
SRAM CODE R, Rotor CENTERLINE Ø front 200 mm / rear 200 mm Adjustable Reach
CRANKBROTHERS SYNTHESIS ALLOY, Front: Aluminum Rim 29“ | Inner Width 31,5 mm | Front Hub 110 x 15 mm | Rear: Aluminum Rim 27,5“ | Inner Width 31,5 mm | Rear Hub 148 x 12 mm
FRONT: MAXXIS ASSEGAI | REAR: MAXXIS MINION DHR II, Front: Tire Size 29“ x 2.5 WT | EXO Casing | 3C MaxxTerra Compound | Tubeless Ready Rear: Tire Size 27,5“ x 2.6 WT | EXO+ Casing | 3C MaxxTerra Compound | Tubeless Ready
SHIMANO EP8, Torque 85 NM | Power 250 W I E-TUBE PROJECT APP
SMP YT CUSTOM, Removable | 540 Wh Capacity | 36 V
SHIMANO E7000, Monochrome I 35 mm