Jeffsy CORE 2 29
A 29″ aluminum frame full suspension trail bike with high-end components.
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Manufacturer Price
$2,999Weight | 34.2 lbs |
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Frame | Aluminum |
Suspension | Full, 145 / 150mm |
Fork | Fox Performance Float 36 |
Shock | Fox Float X Performance |
Wheels | 29″ Aluminum |
Drivetrain | 1 × 12 |
Groupset | GX Eagle |
Brakes | 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"
None yet.
Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.
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.
Jan 2024 · Simon Kohler
How did the YT JEFFSY CORE 5 fare in our big 2024 trail bike group test?
Trail bike with fun guarantee
Mind-boggling price/performance ratio
Super intuitive handling
Pure agility!
Countless clever frame details
No storage compartment on the alloy model
Jan 2024 · Dario DiGiulio
The Jeffsy boasts easy, intuitive handling, and now has in-frame snack storage.
Intuitive and easy handling
Active, grippy suspension feel
Quality frame with well-executed storage and accessories
Requires attention in very rough terrain
Some may wish for more supportive suspension
Stock frame storage bags could be improved
Nov 2023
Review: All-new YT Jeffsy reminds us that trail bikes are what we all love about mountain biking, from singletrack to bikeparks…
Oct 2023 · Jamie Darlow
YT has reworked its Jeffsy trail bike, adding more tech, more price, and better performance
Pedals better when sat down and stood up cranking
Frame is sleeker and now comes with internal storage
Bikes range from £2,500 up to £5,999 for Core 5
Amazing spec on Core 5, with Fox Factory suspension
Costs a bomb for a direct-sales bike
Frame storage door could be bigger
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.
May 2022 · Ed Thomsett
An excellent complete package that makes fun of all but the gnarliest descents, thanks to a head angle that feels too steep
Predictable ride quality
A solid suite of parts
Great for riding just about any terrain
Conservative head angle
A good price, but the outrageous value YT’s reputation was built on isn’t there
Fork | FOX 36 FLOAT PERFORMANCE, 29“ | 150 mm | GRIP | 15 x 110mm | 44 mm Offset Travel: 150mm Spring Type: Air |
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Shock | FOX FLOAT X PERFORMANCE, Shock Length: 210 mm | Shock Stroke: 55 mm | 145 mm Travel | 2-Pos Lever | Custom Tune | 0.2 Spacer Travel: 145mm Spring Type: Air |
Bottom Bracket | SRAM DUB BSA, BB DUB BSA 73 MTB |
Headset | ACROS AZX-576, ZS44 ZS56 | High Cap | 2 Spacer 5mm |
Stem | RENTHAL AL6061, Length 50mm | 35mm Clamp | Rise 0° |
Handlebar | RENTHAL AL2014, Width 780mm | Rise 30mm | 7° Back Sweep | 5° Up Sweep | 6061 AL |
Saddle | SDG BEL AIR 3.0, 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 | SRAM GX EAGLE, 12-speed |
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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 CODE R, Rotor CENTERLINE | Front 200 mm / Rear 200 mm Type: Hydraulic Disc |
Rims | DT SWISS M1900, Front: Aluminum Rims 29“ | Inner Width 30 mm | Hub 110 x 15 mm |, Rear: Aluminum Rims 29“ | Inner Width 30 mm | Ratchet LN | Hub 148 x 12 mm | Freehub XD |
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Tires | FRONT: MAXXIS DHF I REAR: MAXXIS MINION DHR II, Front: Tire Size 29“ x 2,50 I EXO+ Casing I 3C MaxxTerra Compound I Tubeless Ready I, Rear: Tire Size 29“ x 2,40 I EXO+ Casing I 3C MaxxTerra Compound I Tubeless Ready |
Last updated May 11