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YT Jeffsy 29 Core 4 in the BIKE test

Peter Nilges

 · 22.11.2021

YT Jeffsy 29 Core 4 in the BIKE testPhoto: Franz Faltermaier
YT Jeffsy 29 Core 4 in the BIKE test
Even though nothing has changed on the frame of the YT Jeffsy, the 150 mm bike will appear in fresh colours and with an updated spec in 2022.

At the YT Industries Jeffsy Core 4 for 5199 euros is the most expensive bike in the current model range, which starts at 2999 euros. In top trim, the Jeffsy has Fox Factory suspension with 150 millimetres of travel, a Sram X01 Eagle drivetrain and aluminium wheels from DT Swiss. This means that the robust all-mountain bike with carbon frame and 29-inch wheels weighs in at an average of 14.1 kilos without pedals. A closer look at the equipment makes it clear: YT Industries makes no compromises when it comes to downhill performance.

We tested the YT Jeffsy 29 Core in the Geißkopf bike park. The all-mountain bike with its convincing suspension and good handling felt very comfortable there.Photo: Franz Faltermaier We tested the YT Jeffsy 29 Core in the Geißkopf bike park. The all-mountain bike with its convincing suspension and good handling felt very comfortable there.

Find out how the new 2022 YT Jeffsy 29 Core 4 performs in practice in the test from BIKE 11/2021, which you can easily download as a PDF below.

The test costs 0.99 euros. Why not free of charge? Because quality journalism has a price. In return, we guarantee independence and objectivity. This applies in particular to the tests in BIKE. We don't pay for them, but the opposite is the case: we charge for them, hundreds of thousands of euros every year.

The rear triangle of the YT Jeffsy is unnecessarily wide, which is why some riders get stuck with their heels or ankles.Photo: Franz Faltermaier The rear triangle of the YT Jeffsy is unnecessarily wide, which is why some riders get stuck with their heels or ankles. YT Jeffsy 29 Core 4: Chain guide and extensive frame protection equip the Jeffsy for every use.Photo: Franz Faltermaier YT Jeffsy 29 Core 4: Chain guide and extensive frame protection equip the Jeffsy for every use.
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If you want to ride with a water bottle in the frame, you have to be prepared to compromise. Because only a special Fidlock bottle will fit.Photo: Franz Faltermaier If you want to ride with a water bottle in the frame, you have to be prepared to compromise. Because only a special Fidlock bottle will fit. At the front wheel, a highly damping tyre with MaxxGrip rubber compound fights against loss of traction.Photo: Franz Faltermaier At the front wheel, a highly damping tyre with MaxxGrip rubber compound fights against loss of traction. Depending on the flip-chip setting (Low = short travel), the rear travel varies by 6 millimetres and the steering angle by 0.6 degrees. The suspension on the Jeffsy 29 Core 4 works perfectly.Photo: Franz Faltermaier Depending on the flip-chip setting (Low = short travel), the rear travel varies by 6 millimetres and the steering angle by 0.6 degrees. The suspension on the Jeffsy 29 Core 4 works perfectly.

Downloads:

YT Jeffsy 29 Core 4 (pdf)

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