2024 YT Industries
Jeffsy UNCAGED 13 MX
A 29″ / 27.5″ aluminum frame full suspension trail bike with high-end components.
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Manufacturer Price
$2,979| Weight | 34.2 lbs |
|---|---|
| Frame | Aluminum |
| Suspension | Full, 145 / 150mm |
| Fork | Marzocchi Bomber Z1 |
| Shock | Marzocchi Bomber |
| Wheels | 29″ / 27.5″ Aluminum |
| Drivetrain | 1 × 12 |
| Groupset | GX 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 Comparison5'0" – 5'6"
5'3" – 5'10"
5'7" – 6'1"
5'11" – 6'5"
6'2" – 6'8"
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May 2024 · YT Industries
Now, YT Industries takes it back to the 90s with a limited, retro-inspired Uncaged 13 edition, mixing things up with an MX-specific frame and custom, nostalgic silver components..
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.
Nov 2023
Review: All-new YT Jeffsy reminds us that trail bikes are what we all love about mountain biking, from singletrack to bikeparks…
Jun 2023 · Tom Marvin
A blast from the past that's still a serious contender
Fun, poppy ride quality
Excellent frame details
Good value for money
Some pedal bob when you’re trying hard
Harsh cockpit
Brakes are underwhelming
Feb 2023
Read our YT Industries Jeffsy Core 2 review and see why this versatile, affordable mountain bike is made for rippers and beginners alike. Read the review now!
Best Bang for the Buck
Solid Spec
Looks the Most Refined
Comfortable All-Day Ride
Shift Performance or lack thereof
G2 Brake Fade
Short Dropper Post
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 | MARZOCCHI BOMBER Z1, 29“ | 150 mm | GRIP | 15x110 mm | Gloss Red | 44 mm Offset Travel: 150mm Spring Type: Air |
|---|---|
| Shock | MARZOCCHI BOMBER AIR, 210 x 55 mm | 2pos-Adjust | CL RM | 0.6 Spacer Travel: 145mm |
| Bottom Bracket | SRAM DUB BSA, BB DUB BSA 73 MTB |
| Headset | CANE CREEK SERIES 40, ZS44 ZS56 | High Cap | 2 Spacer 5mm |
| Stem | RENTHAL APEX 35, 50 mm | +/-6° | Custom Silver |
| Handlebar | RENTHAL FATBAR 35, Width 780mm | Rise 30mm | 7° Back Sweep | 5° Up Sweep | 6061 AL | Custom Silver |
| 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 25/10/5mm | 125 mm (S) I 150 mm (M) | 170 mm (L) | 200 mm (XL) | 230mm (XXL) Type: Dropper |
| Grips | ODI VANS V2.1, Lock On | Red |
| Rear Derailleur | SRAM GX EAGLE, 12-speed |
|---|---|
| Crank | SRAM GX EAGLE, Crank Arm Length 170 mm | 32T |
| Shifters | SRAM GX EAGLE, 12-speed |
| Cassette | SRAM GX EAGLE, 10-52T | 12-speed |
| Brakes | SRAM G2 ULTIMATE, Polar Grey Anodized | Rotor CENTERLINE | Front 200 mm / Rear 200 mm Type: Hydraulic Disc |
| Rims | CRANKBROTHERS SYNTHESIS ENDURO 2 ALLOY - SILVER OE, Front: 29’’ 31,5 mm | 110 x 15 mm | 6-Bolt, Rear: 27,5’’ 29,5 mm | 148 x 12 mm | 6-Bolt | XD |
|---|---|
| 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, Rear: Tire Size 27.5“ x 2.40 WT I EXO+ Casing I 3C MaxxTerra Compound I Tubeless Ready |
Last updated June 22