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Today’s Deals2024 YT Industries
Jeffsy UNCAGED 14 29
A 29″ carbon frame full suspension trail bike with high-end components.
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Manufacturer Price
$4,999| Weight | 33.3 lbs |
|---|---|
| Frame | Carbon |
| Suspension | Full, 145 / 150mm |
| Fork | Öhlins RXF36 |
| Shock | Öhlins |
| Wheels | 29″ Aluminum |
| Drivetrain | 1 × 12 |
| Groupset | XT |
| Brakes | Hayes Dominion A4 Hydraulic Disc |
| Seatpost | Dropper |
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.
Compare the full Jeffsy model range
View Comparison5'0" – 5'6"
5'3" – 5'10"
5'7" – 6'1"
5'11" – 6'5"
6'2" – 6'8"
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Summary
The YT Industries Jeffsy is a highly versatile trail bike that excels in both climbing and descending, offering a fun and agile ride. Its updated frame features internal storage and a sorted component package, making it a great value for the price. While it performs well on a variety of trails, some reviews note areas for improvement in stability and component durability.
Excellent ride-anywhere bike
Updated frame with internal storage
Sorted component package
Rides lighter than its actual weight
Versatile for both rowdy trail sessions and long days in the saddle
Matte black carbon finish is easily scratched and scuffed
Lacks stability at high speeds
SRAM SX Eagle drivetrain required regular adjustment
The new Jeffsy is an excellent trail bike package that can handle tougher stuff too.
Bike PerfectThe JEFFSY turns every trail into a round of Wild Mouse. No other bike in the test is this much fun.
Enduro Mountainbike MagazineThe YT Jeffsy Mk3 Core 4 is a capable all-mountain bike which, thanks to its spec, has a bias towards descending but is equally able to climb.
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Feb 2025
Calling these bikes “all-new” might be a stretch, but there's no denying the incredible value and versatility.
Nov 2024 · Nelson
With a value spec of workhorse components, and putting higher-end components where it matters, this is a hard package to beat.
Top-notch paint quality and finish
Cleanly designed internal cable routing
V4L suspension design for great traction and efficient climbing
SRAM SX Eagle 12-speed with a broad gearing range
SRAM G2 R brakes with adjustable reach levers
YT Postman 100mm dropper seatpost enhances riding experience
Maxxis DHR II tires for excellent cornering and traction
Great value with workhorse components and higher-end components where it matters
SRAM SX Eagle drivetrain requires regular adjustment
760mm-wide aluminum handlebar too wide for most kids
Significant seal friction in forks and shocks for lighter riders
Stiff 35mm aluminum handlebar may exacerbate feedback and control issues
Aug 2024 · Cory Benson
YT’s newest limited edition Uncaged 14 build decks out their latest Jeffsy carbon trail bike with a killer paint job, a drool-worthy build, the first…
Aug 2024 · YT Industries
Its 145mm of rear travel utilizes the World Cup-winning V4L linkage, and with five sizes available, complete with size-specific chainstay lengths (437mm for S-L / 442mm for XL-XXL), there is an Uncaged 14 for all riders.
Mar 2024 · Ben Haworth
The YT Jeffsy Core 4 is a bike that arrives in a box that is not quite perfect out of the box. BUT... there is loads of potential here.
Aug 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
Jul 2022 · Simon Kohler
In our 2022 trail bike group test, the YT JEFFSY 6 stands up against the competition with an electronic RockShox Flight Attendant suspension system.
Clean look
Solid climber
Direct and precise handling
Brakes lack power
Limited freedom of movement (due to long seat tube and short dropper post)
| Fork | ÖHLINS RXF36 M.2 AIR, 29“ | 150mm | 15 x 110mm | TTX 18 | H/LSC LSR | 44mm Offset Travel: 150mm Spring Type: Air |
|---|---|
| Shock | ÖHLINS TTX2 AIR, 210 x 55 mm | 3 pos. HSC LSC LSR | 145mm Travel Travel: 145mm |
| Bottom Bracket | SRAM DUB Pressfit, BB DUB PF 92 MTB w. 2 mm Spacer |
| Headset | CANE CREEK SERIES 40, ZS44 ZS56 | High Cap | 2 Spacer 5mm |
| Stem | TITLE ST1, 40 mm | +/-0° | Custom Purple |
| Handlebar | TITLE AH1, Width 800mm | Rise 38mm | 8° Back Sweep | 5° Up Sweep | Polished Chrome |
| Saddle | SDG BEL AIR 3.0, 140 mm I Lux-Alloy Rail I Uncaged Custom Design |
| 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 RD-M8100, 12-speed | Shadow+ |
|---|---|
| Crank | 5DEV R-SPEC TRAIL ENDURO, 170 mm | 32T | 29mm I Matte Raw |
| Shifters | SHIMANO XT SL-M8100, 12-speed | Rapidfire Plus | 2-Way-Release |
| Cassette | SHIMANO XT CS-M8100, 10-51T | 12-speed I Hyperglide+ |
| Brakes | PURPLE HAYES DOMINION A4, Rotor Front 203 mm / Rear 203 mm Type: Hayes Dominion A4 Hydraulic Disc |
| Rims | CUSTOM CRANKBROTHERS SYNTHESIS ENDURO ALLOY I9 1/1, Front: Aluminum Rims 29“ | Inner Width 31,5 mm | Hub 110 x 15 mm | I9 1/1 // Rear: Aluminum Rims 29“ | Inner Width 29,5 mm | Hub 148 x 12 mm | Freehub I9 1/1 Microspline |
|---|---|
| Tires | FRONT: MAXXIS DHF I REAR: MAXXIS MINION DHR II, Front: Tire Size 29“ x 2.50 WT I EXO+ Casing I 3C MaxxTerra Compound I Tubeless Ready I Rear: Tire Size 29“ x 2.40 WT I EXO+ Casing I 3C MaxxTerra Compound I Tubeless Ready |
First added August 10
Last updated February 15
Not listed for 482 days