JEFFSY Comp
A 27.5″ carbon frame full suspension enduro bike with high-end components.
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Manufacturer Price
$2,999Weight | 30.4 lbs |
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Frame | Carbon |
Suspension | Full, 160 / 160mm |
Fork | Fox Rhythm Float 36 |
Shock | Fox Float DPX2 Performance |
Wheels | 27.5″ Aluminum |
Drivetrain | 1 × 12 |
Groupset | NX Eagle |
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 Jeffsy model range
View ComparisonAug 2022
The YT Jeffsy 29 Core 3 is a very capable all-mountain bike which can handle the rough stuff but is equally at home on flow trails and jumps. While the specification list is solid for the money, it's worth paying extra attention to frame sizing and geometry to get the ride you want. With a longer dropper and some tougher tyres this bike has what it takes to be a real challenger when it comes to the best mountain bikes.
Aug 2022 · Richard Owen
Like Robocop or the Six Million Dollar Man, YT have rebuilt the Jeffsy with top notch tech to be (even) better than it was before
Superbly capable
Wants to blast every trail
Packed with top tech
Instant freehub engagement
App driven suspension setup
A hefty investment
Slightly conservative geometry
Apr 2022 · Matt Beer
Following the recent release of YT's Capra and Decoy MX Uncaged 9 builds is the trail-friendly 150mm Jeffsy Uncaged 8.
Dec 2021 · Lydia Tanner
A great value with an appetite for rowdier trails. .
Incredibly capable
Incredibly fun
Incredibly versatile
Incredible value
Pedal bob had us using the lockout on long climbs
Slightly limited water bottle space
Could use stronger brakes
Oct 2021 · Robert Johnston
The YT Jeffsy 29 Core 4 is a versatile all mountain bike that’ll happily crunch out mellower miles or tackle some tough enduro tracks.
Well-Rounded nature
Capable suspension package
Technical climbing prowess
Steeper head angle in steep terrain
Flimsy tires
Aug 2021 · McCoy
The Jeffsy hits the mark for a rider who wants to go a step beyond...
Jul 2021 · Loganbrown
Not your typical Vital bike test...
All fun, all the time
Capable climber
Excellent parts spec
Encourages aggressive riding
Confident descender for both rocks and jumps
A true all-rounder
Frame protection quickly peels
Seemingly forever sold-out (even before the bike boom)
Jun 2021 · Jeremy Benson
The Jeffsy Core 3 is the latest version of YT's popular longer travel trail bike. While other brands have gone to extremes with their geometry, this bike's...
Frame | JEFFSY Carbon 27" high modular carbonfiber frame | V4L Virtual 4-Link rear suspension | 148x12mm DT Swiss QR Thru axle | down tube/seat stay/chain stay protection |
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Fork | FOX 36 Float Rhythm 27,5" | 160 mm | 15 x 110 | 44 mm Rake Travel: 160mm Spring Type: Air |
Shock | FOX Float DPX2 Performance 230 x 65 mm | 3 pos- Adjust Travel: 160mm Spring Type: Air |
Headset | Acros AZX-576 High Cap |
Stem | E13 Base 50 mm |
Handlebar | E13 Base 35 mm Rise | 780 mm Width |
Saddle | SDG RDR MNT YT Custom |
Seatpost | YT Postman 31.6 mm | S - M 125 mm drop / L 150 mm drop / XL - XXL 170 mm drop Type: Dropper |
Pedals | included / inklusive The included pedals were not made for demanding trails or racing. That is why we also offer you quality pedals at an attractive price in the shopping cart. |
Grips | ODI Elite Motion V 2.1 Lock- On |
Rear Derailleur | SRAM NX Eagle 12- Speed |
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Crank | SRAM NX Eagle 175 mm | 32 T | DUB |
Shifters | SRAM NX Eagle 12- Speed |
Cassette | SRAM PG1230 Eagle 11- 50 T | 12- Speed |
Brakes | SRAM Guide R Rotor Centerline 200 mm / 180 mm Type: Hydraulic Disc |
Rims | E13 TRS 27,5" x 27 mm | 110 x 15 mm | 148 x 12 mm |
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Tires | Front: MAXXIS Minion DHR II 27,5" x 2.4 | EXO | TR, Rear: MAXXIS Minion DHR II 27,5" x 2.4 | EXO | TR |
Last updated February 5
Not listed for 1,177 days