Like most of the other test candidates, YT also relies on an aluminium frame. However, at 3539 grams, it is quite heavy and is only surpassed by the Focus Jam. With the pedals fitted, the indicator on the scales climbs to over 16 kilos, making the YT one of the heaviest bikes in the test. Thanks to the high cockpit, you sit relaxed on the Jeffsy and climb comfortably uphill, even if the rear suspension only pumps a little.
Downhill, the YT Jeffsy only needs a few turns to fight its way into the hearts of the testers: you're centred and deeply integrated into the bike. Thanks to the not too long reach and short chainstays, the handling remains uncomplicated and predictable. In short: the Jeffsy is fun to ride and gives you a secure feeling. At the same time, the 64.1 degree head angle creates the necessary amount of smoothness for high-speed passages.
It's just a shame that the rear suspension can't quite keep up with the great handling. The rear could work more sensitively on fast hits and generate more traction. The low-slung top tube reduces the standover height, which could be particularly interesting for smaller riders. However, the frame design offers no space for a large water bottle. Despite the short seat tube, the telescopic seat post has the shortest stroke at just 145 millimetres.
Conclusion on the YT Jeffsy Core 2
Max Fuchs, BIKE Editor: For € 2999, the YT Jeffsy Core 2 offers solid value for money, even if the bike is quite heavy. The intuitive handling is impressive. However, the rear suspension could be more sensitive.
Technical data YT Jeffsy Core 2
General
- Price: 2999 Euro
- Frame material: aluminium
- Frame size: S, M, L, XL, XXL (Tested size L / 44 cm)
- More info->
Measured values
- Weight without pedals: 15.76 kg
- Gear ratio / bandwidth: 32; 10-52 / 520 %
Equipment
- Fork: Fox 36 Float Performance Fit Grip
- Shock: Fox Float Performance
- Crank: Truvativ Descendant
- Gear system: Sram NX Eagle 1 x 12
- Gear ratio / bandwidth: 32; 10-52 / 520 %
- Brake system / Disc (front / rear): Sram G2 R / 200 mm / 200 mm
- Telescopic post / stroke / Ø: YT Postman / 145 mm / 31.8 mm
- Wheels: DT Swiss XM 1900
- Tyres: Maxxis DHR II; Exo Protection TR 29 x 2.40
- Ease of maintenance: weak
You can download the complete tests of our all-mountain bikes here:
Test All Mountains 2022 from BIKE 7/2022
