The geometry can be adjusted using a flip chip, allowing the already steep steering angle (66°) to be steepened by a further 0.5°. The stroke is slightly reduced in the slack setting. On the trail, you hardly notice the YT Jeffsy's impressive reach. All testers liked the geo straight away. Striking: The Jeffsy Core 3 rides very quietly (we love it!). The trail bike steers directly through turns, always reacts predictably and quickly gains the rider's trust.
The suspension of the YT Jeffsy works on a similar level to Propain and Specialized, but differs significantly in character. The Jeffsy is not a comfort miracle, but it provides pleasant feedback and gives you that race feeling. On rough, fast sections, we appreciated the sporty counter-pressure and quickly felt comfortable with the Jeffsy Core 3. The geo supports the rider with a plush feel and a high front end. On tour, the Jeffsy pedals well uphill with its steep seat angle. The three modes in the shock could be better defined.
STRENGTHSChassis, geo, price/performance
WEAKNESSESWeight, brake
Conclusion
The YT Jeffsy Core 3 is the raciest bike in the test. It has a sporty, plush suspension, a comfortable geometry and enough playfulness for the undulating home trails.
Alternative to the YT Jeffsy Core 3:
The entry-level model Jeffsy Core 2 is already available for 2999 euros. The aluminium Jeffsy is available with either 27.5-inch or 29-inch wheels. According to the manufacturer, the 27.5-inch version with Fox Performance suspension comes in at 15.1 kilos without pedals.
Technical data YT Jeffsy Core 3
Manufacturer information
- Distribution YT Industries GmbH
- Material / Sizes: Carbon / S, M, L (tested size), XL, XXL
- Price / weight without pedals: 4199 euros / 14.7 kg
Medical data
- Front / rear suspension travel: 150 mm / 150 mm
- Rear suspension system: four-link
- Reach: 468 / 474 mm
- Stack: 630 / 625 mm
- BB drop: -31 / -24 mm
Equipment
- Fork / Shock: Fox 36 Float Performance Elite / Fox Float DPX2 Performance Elite
- Cranks / gears: Sram Descendant / Sram GX Eagle
- Brake system: Sram G2 R
- Wheels: DT Swiss M 1900 Spline 30 system wheelset
- Tyres: Maxxis Minion DHR II Exo Protection 2.4 / Maxxis Minion DHR II Exo Protection 2.4
Statement from Steffi Marth, racer and guest tester:
If I had to choose a test bike to race on - I would go for the YT Jeffsy. I like the geometry and the direct, aggressive suspension, which generates a lot of propulsion. The Jeffsy is still playful enough. My favourite.
Laurin Lehner
Editor
