One bike for everything. The dream of every biker. But is that even possible? The answer from mail-order company YT is yes, and it goes by the name of Jeffsy. The Forchheim-based company has had this supposed all-purpose weapon in its range since 2017. The bike received its first update in 2019, and after a long development cycle, the third expansion stage of the all-mountain bike is finally in the starting blocks for the 2024 season.
The facts about the new YT Jeffsy
Little has changed in the key data compared to its predecessor. Wheel size: 29 inch. Suspension travel: 150 millimetres at the fork and 145 millimetres at the rear. This still places the Jeffsy perfectly between the Capra enduro bike and the Izzo trail bike.
- Suspension travel: 145 / 150 millimetres
- Wheel size: 29-inch
- Frame material: Choice of carbon or aluminium
- Price: Five models between 2499 euros and 5999 euros
- Weight: Five models between 14.8 and 16 kilos
- Special features: Flipchip, waterproof storage compartment in the down tube, size-specific geometry
YT Jeffsy 2024: A lot of attention to detail
Apart from the key data, however, the development team has left no stone unturned in the evolution of the Jeffsy. The obvious first: without the slightly curved top tube and the bracing between the top tube and seat stay, the Jeffsy 2024 radiates a little more understatement and thus distances itself from its original design. There is still a choice of carbon or aluminium for the frame material. If you look towards the bottle cage, another innovation is revealed: for the first time on one of their bikes, the Forchheim-based company has integrated a storage compartment in the down tube under a filigree plastic cover. The developers have fitted the cover with a rubber seal, which protects the storage compartment from splashing water, but also prevents the development of noise between the frame and the plastic cover.
The geometry of the YT Jeffsy: longer, flatter and size-specific
The YT Jeffsy also shows a completely new face in terms of geometry data - fortunately. Because over the years, the geometry of its predecessor has been gathering more and more dust. The reach of the new size L model has increased from 469 to 475 millimetres. The steering angle is a whole degree slacker and now measures 65 degrees. This longer, slacker treatment is particularly effective downhill and gives the newcomer noticeably more confidence at high speeds. Nevertheless, the bike remains free of extremes and keeps its distance from even more downhill-orientated enduro bikes.
Another unique selling point of the new Jeffsy is its size-specific chainstays. According to the manufacturer, these measure 437 millimetres in sizes S, M and L and 442 millimetres in frame sizes XL and XXL. The seat angle, on the other hand, does not change with increasing frame size and measures 77 degrees in all sizes with a normal saddle extension. This means that bikers of all sizes can enjoy a perfectly balanced geometry. Also good: A flip chip on the shock mount allows the geometry of the new model to be changed minimally. The bike comes from the factory in the low setting. If you turn the small component by 180 degrees, the bottom bracket rises by eight millimetres and both the steering angle and the seat angle become 0.6 degrees steeper. This setting is particularly suitable for bikers who want to sacrifice some of the smoothness in favour of more agile handling.
Bike editor Max Fuchs' first ride impression of the new YT Jeffsy
At the press camp in the Forest of Dean in England, I was able to ride the top model Jeffsy Core 5 (price: € 5999) extensively over two days and collect plenty of trail kilometres on it. Despite the increased length, the position on the bike is not too sporty, but balanced and pleasantly propulsion-orientated. It is clear from the very first few metres: although the latest version of the Jeffsy has noticeably increased its riding safety and confidence, the bike still retains the intuitive, direct handling that has been praised many times in tests.
The suspension works sensitively, generates top traction and still offers plenty of support. This allows the bike to be pumped efficiently through the terrain and effortlessly pulled into flight mode on off-road edges. In rough terrain, the extra smoothness is pleasing. The new Jeffsy feels more confident at high speeds and the suspension also reliably absorbs rough impacts. Even with the shock open, it is easy to pedal uphill in a pedalling stance. However, if you insist on maximum efficiency, you can also reach the platform lever on the shock without any problems while riding. The rear end reliably filters out bumps even when the chain is pulled, generating a lot of traction on the climbs. Thanks to the steeper seat angle, you can climb even demanding ramps in a controlled manner and only have to fight against the rising front wheel at a late stage - a bull's eye!
Models and prices of the new YT Jeffsy
The Jeffsy is being launched in five different versions to ensure that there really is a suitable bike for every touring rider and every trail biker looking for an all-rounder. Two aluminium models for 2499 and 2999 euros and three carbon models from 3999 to 5999 euros. The geometry remains the same for both material variants. The wheel size does not change either. The same applies to the kinematics and suspension travel. Both frame variants also have the practical Sram UDH derailleur hanger and are therefore compatible with Sram's Transmission drivetrains. The storage compartment in the down tube is only found on the carbon models. According to the manufacturer, the weights are between 14.8 and 16 kilos without pedals, depending on the model in frame size S.
Specs Jeffsy Core 1 / 2499 Euro
- Frame material: aluminium
- Suspension fork: Rockshox Lyrik Base
- Shock: Rockshox DLX Select+
- Gear group: Sram NX Eagle
- Brakes: Sram DB8
- Wheels: SUNRINGLE SR329 Trail Comp
- Weight: 16 kilos in size S
Specs Jeffsy Core 2 / 2999 Euro
- Frame material: aluminium
- Suspension fork: Fox 36 Float Performance
- Shock: Fox Float X Performance
- Gear group: Sram GX Eagle
- Brakes: Sram Code R
- Wheels: DT Swiss M1900
- Weight: 15.5 kilos in size S
Specs Jeffsy Core 3 / 3999 Euro
- Frame material: Carbon
- Suspension fork: Fox 36 Float Performance
- Shock: Fox Float X Performance
- Gear group: Sram GX Eagle
- Brakes: Sram Code R
- Wheels: DT Swiss M1900
- Weight: 14.9 kilos
Specs Jeffsy Core 4 / 4999 Euro
- Frame material: Carbon
- Suspension fork: Rockshox Lyrik Ultimate
- Shock absorber:Rockshox SDLX Ultimate
- Gear group:Sram GX Eagle Transmission
- Brakes: Sram Code RSC
- Wheels: Crankbrothers Synthesis Enduro Alloy
- Weight: 15.1
Specs Jeffsy Core 5 /5999 Euro
- Frame material: Carbon
- Suspension fork: Fox 36 Float Factory
- Shock: Fox Float X Factory
- Shift group: Sram XO Eagle Transmission
- Brakes: Sram Code RSC
- Wheels: Crankbrothers Synthesis Enduro Alloy
- Weight: 14.8 kilos
Max Fuchs
Editor
