Decoy CORE 4 MX
A 29″ / 27.5″ carbon frame full suspension enduro e-bike with high-end components.
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Manufacturer Price
$5,999Weight | 52.0 lbs |
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Frame | Carbon |
Suspension | Full, 165 / 170mm |
Fork | Öhlins RXF38 |
Shock | Öhlins |
Wheels | 29″ / 27.5″ Aluminum |
Drivetrain | 1 × 12 |
Groupset | XT |
Motor | Shimano 250W 85Nm mid-drive |
Battery | 720Wh |
Brakes | Hydraulic Disc |
Seatpost | Dropper |
For This Bike
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.
Compare the full Decoy model range
View Comparison5'4" – 5'9"
5'7" – 6'1"
5'10" – 6'4"
6'2" – 6'7"
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Jan 2024 · Richard Owen
The Decoy's frame may have been around for a while now, but there's still lots to love about this lively MX e-MTB
Agile, playful handling
Bigger battery equals more ride time
Light for a big battery, big motor bike
Top spec Fox Factory suspension
Geometry adjusting flip-chip
Short wheelbase and reach
Bigger battery equals more weight
Needs tougher tires for rocky trails
Dec 2023 · YT Industries
The bikes now have Shimano's EP801 motor, complete with Free Shift technology.
Jun 2023
The YT Industries Decoy 29 Core 3 is touted as the brand’s do-it-all e-MTB and several months of testing have proven the company has hit the nail on the head. Despite its comparably short reach and overall length for a modern trail-orientated e-MTB, the Decoy is fun on almost any trail thanks to a welcoming but impressively well-rounded ride. It’s great value for money, too, employing an array of very well-picked components with a reasonable asking price to boot. This is without a doubt one of the very best e-mountain bikes currently available.
Apr 2023 · Alan Muldoon
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
Jan 2023 · Ron Koch
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.
Jun 2022
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!
Fun and well-rounded ride
Suspension tune overall
Looks good
Reliable! Stayed tight and quiet
Wheel spec
Balanced angles (HT and ST)
Short, snappy rear end
Sizing
200mm rotor spec
Motor felt underpowered
Small battery
Fell back on chunky DH tracks
May 2022 · Alex Evans
A poppy and playful ride that offers addictive fun, but comes at the expense of outright speed and stability
Easy-to-remove battery
Supportive suspension
Synthesis wheelset
Intuitive ride
EXO+ casing tyres
Battery capacity
Geometry compromises
Mar 2022 · Ian Collins
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
Fork | ÖHLINS RXF38 M.2, 29“ | 170 mm | H/LSC LSR | 15x110 mm | 51mm Offset Travel: 170mm |
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Shock | ÖHLINS TTX22 M.2, Length: 230 x 65 mm | H/LSC LSR | C10R40 (S-L) | C10R50 (XL-XXL), ÖHLINS STEEL SPRING: 388 (M) I 411 (L) I 434 (XL) I 457 (XXL) Travel: 165mm |
Bottom Bracket | BSA, 73mm, threaded |
Headset | ACROS AZX-260, Block Lock I High Cap I 2 Spacer 5mm I Flat capset |
Stem | RENTHAL APEX 35, Length 50mm | 35mm Clamp | Rise +/-6° | Black/Black |
Handlebar | RENTHAL AL2014, Width 800mm | Rise 30mm | 7° Back Sweep | 5° Up Sweep | 6061 AL |
Saddle | SDG BEL AIR V3 MAX, YT Custom | Width 140 mm I Lux-Alloy Rail |
Seatpost | YT POSTMAN V2, Ø 31,6mmI MMX-Remote | Adjustable drop 20/10/5mm | 125 mm (S) I 150 mm (M) | 170 mm (L) | 200 mm (XL) | 230mm (XXL) Type: Dropper |
Grips | ODI ELITE MOTION V2.1, Lock On |
Rear Derailleur | SHIMANO XT, M8100 | Shadow Plus | 12-speed |
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Crank | SHIMANO XT, M8150 | Crank Arm Length 160 mm | HOLLOWTECH |
Shifters | SHIMANO XT SL-M8100, 12-Speed | Rapidfire Plus | 2-Way-Release |
Cassette | SHIMANO XT, M8100 | 10-51T | 12-speed I Hyperglide+ |
Chain Guide | E13 e*SPEC Plus, 2-Bolt | 34-38T | Compact Slider |
Brakes | HAYES DOMINION A4, Stealth black/grey | Rotor HS2 Ø front 220 mm / rear 203 mm Type: Hydraulic Disc |
Rims | CRANKBROTHERS SYNTHESIS ALLOY E-MTB, 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 | Microspline |
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Tires | FRONT: MAXXIS ASSEGAI I REAR: MAXXIS MINION DHR II, Front: 29’’ x 2.5 WT I 3C Maxx Grip I Double Down I TR, Rear: 27.5’’ x 2.4 WT | 3C MaxxTerra I Double Down | TR |
Motor | SHIMANO EP801, Torque 85 NM | Power 250 W I E-TUBE PROJECT APP |
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Battery | SMP YT CUSTOM, Removable | 720 Wh Capacity | 36 V | 4A Charger |
Display | SHIMANO STEPS SC-EM800, Color I 35 mm |
Last updated May 18