YT Jeffsy Core 4 29" Carbon Black Magic MTB Medium

JEFFSY Core 4 - why you want it.

YT cut no corners for the highest CORE level - these uncompromising Factory Team level packages were made for taking on the most demanding terrain. The JEFFSY CORE IV are equipped with the absolute best components and every little detail has been optimized for performance.

Kit Level - Maximal adjustability for uncompromised riding

The JEFFSY Core 4 boasts a FOX Factory Team Level package and seeks riders looking to pin it on every ride. This bike is equipped with a lighter high modulus carbon frame available in the colorways 'Vlad Red' and 'Black Magic'. Thanks to the highly adjustable dream team of the FOX 36 Float Factory fork and FOX Float DPX2 Factory rear shock, riders can rely on 150mm travel front and rear.

Geometry you can't overlook

The JEFFSY Core 4 comes with 29-inch wheels and high-performance carbon frames. All models are available in frame sizes S to XXL with a fun-loving DNA and geometry, which can be adjusted thanks to the Flip Chip, which drops the bottom bracket by 8 mm and results in a 0.5-slacker head and seat tube angle.

Drivetrain SRAM X01 Eagle

The best mechanical groupset on the market. We do not compromise on our pro race models and trust in their precision and speed. Only the best and lightest crankset-bottom bracket unit in this class! The one-piece X-Dome cassette delivers XC level weight.

DT Swiss XM 1700 Spline

These high-end aluminum wheels from DT Swiss were specifically developed for all-mountain versatility: on the one hand, they are super light which helps avoid wasting energy on the climbs, on the other hand, they are very robust and ready to tackle the rowdiest descents.

Fox Float X Factory 150 mm

The distinguishing features of the Fox Float X are its sensitive response and the extensive, tool-free setting options. A further development of the proven DPX2, the Float X offers every rider perfect control and comfort on fast descents, big jumps, and deep drops.

Fork Fox 36 Float Factory 150 mm

High and low-speed compression and rebound can be adjusted independently of each other. In combination with the low friction Kashima coating and the easily adjustable Float air spring, a professional-level set up can easily be achieved.

Frame: Ultra Modulus Carbon Frame

. Colour: Black Magic

. Frame Size: Available in S, M, L, XL, XXL sizes

Wheels: DT Swiss XM 1700 Spline

. Tyres: Maxxis Minion DHR II

Suspension:

. Fork: Fox 36 Float Factory

. Shock: Fox Float X Factory

Drivetrain:

. Crankset: SRAM Descendant Carbon

. Cassette: SRAM XG1295 Eagle

. Rear Derailleur: SRAM X01 Eagle

. Rear Shifter: SRAM X01 Eagle

Components:

. Headset: Acros AZX-576

. Stem: Renthal Apex 35

. Handlebar: Renthal Fatbar 35

. Grips: ODI Elite Motion V2.1

. Brakes: SRAM G2 RSC

. Seatpost: YT Postman MMX Remote

. Saddle: SDG Bel Air 3.0

. Weight: 13.90 kg / 30.64 lb