The alloy rear triangle offers great sensitivity, delivers good progression when it matters and gives you a lot of pop to let you give into your more playful instincts. The generous reach, slack headangle and 150 mm of travel make for a quick and stable ride on the descents. The low standover height and the compact chainstays optimize the handling and ensure agility even in demanding terrain.
As a true all-mountain bike JEFFSY also performs on the climbs: the rear suspension is practically bob-free and the steep seat tube angle lets you gain the summit with ease. To ensure consistent handling across all the frame sizes and to make sure you feel right at home on your JEFFSY, we made the chainstays longer on the XL and XXL. The result: JEFFSY lets you truly redefine your riding style.
Aside from the missing Kashima coating, the 150 mm FOX 34 Float Performance Elite fork and the FOX Float DPS Performance Elite shock want for nothing in terms of performance when compared to the Factory versions. The reason for this are the near-identical damping cartridges which offer excellent responsiveness and enough adjustability to satisfy even the most demanding of racers.
Equipped with Shadow+ technology, Shimano’s easy-shifting XT rear derailleur presents a low profile and reduces chainslap for a quiet and serene riding experience. The shifting performance of the e*thirteen cassette ensures even more fun on the trail: with 9–46 teeth it provides crisp shifting and enough range to tackle both climbing and decending. SRAM’s Guide R brakes with proven 4-pot calipers slow you down reliably and with good modulation, while e*thirteen’s TRS+ wheels and tires give you the best possible grip.
FrameJEFFSY Carbon 27"
high modular carbonfiber main frame with aluminium rear triangle | V4L Virtual 4-Link rear suspension | 148x12mm DT Swiss QR Thru axle | down tube/seat stay/chain stay protection
27,5“ x 27mm | 110x15 mm | 148x12mm
HandlebarRenthal Fatbar 35
30mm Rise | 800mm
ColorEMBER ORANGE / NIGHT BLUE
EMBER ORANGE / NIGHT BLUE
CONCRETE GREY / BLACK MAGIC
Front Tiree*thirteen TRS Plus
27,5" | 2.35
StemRenthal Apex 35
Travel front/rear150mm / 150mm
Rear Tiree*thirteen TRS Plus
27,5" | 2.35
GripsODI Elite Motion
V2.1 | Lock On
Frame SizeS / M / L / XL / XXL
175mm | 32T BOOST
Weight*13,3 kg / 29,3 lb
* Weight measured without pedals in smallest frame size available. Due to manufacturing tolerances of the individual components the bike weight may differ +/- 5%
Rear DerailleurShimano XT
Shadow Plus | 11-Speed
Seatposte*thirteen TRS Plus
31.6mm | 125mm / 150mm / 170mm Drop
ForkFOX 34 Float Performance Elite
150mm | Fit 4 | 15QRx110 | 44mm Rake
SaddleSDG FLY MNT Cutout
YT Custom | Orange | Grey
ShockFOX Float DPS Performance Elite
3pos-Adj. | Evol LV | 230X60mm
Cassettee*thirteen TRS Plus
9-46T | 11-Speed
BrakesSRAM Guide R
ROTOR CENTERLINE | 200mm / 180mm
ChainSRAM GX Eagle
Bottom Brackete*thirteen BB92
Pedalsincluded / inklusive
The included pedals were not made for demanding trails or racing. That is why we also offer you quality pedals at an attractive price in the shopping cart.
Tool KitIceToolz Set
Torque Wrench (3NM-10NM; 3-6mm, reset) | Shock Pump (330psi/20.6bar; pressure relief valve) | Allen Key | Anti-Slip Paste
Progress means change. In the case of the new JEFFSY 27, the changes are relatively small but the improvements are still noticeable. For an even better ride, we have given the new JEFFSY 27 longer reach and a slacker headangle. This has a calming effect on the bike and gives you more control when things get steeper and faster, the long reach helping JEFFSY stay on track and making sure even taller riders can sit “in” the bike.
To apply YT’s Tailor Made concept also to the new JEFFSY, we’ve significantly shortened the seat tube and introduced an XXL size. This gives you the choice between two or even three frame size in order to adapt the reach measurement to your riding style and preferences. To ensure consistent handling across the frame sizes, we’ve made the chainstays longer on the XL and XXL, while the integrated Flip Chip lets you further adapt the bike’s geometry to suit your technique and terrain. Run it in the low position to slacken the headangle and lower the BB for fast and rough terrain, or switch to the high position to raise the BB for better clearance and more fun on the climbs.
|A Toptube length||566 mm||589 mm||612 mm||635 mm||658 mm|
|B Reach||425 mm||445 mm||465 mm||485 mm||505 mm|
|C Stack||596 mm||605 mm||614 mm||623 mm||632 mm|
|D Seattube length||395 mm||415 mm||435 mm||460 mm||485 mm|
|E Chainstay length||432 mm||432 mm||432 mm||437 mm||437 mm|
|F Headtube angle||66 / 66,5 °||66 / 66,5 °||66 / 66,5 °||66 / 66,5 °||66 / 66,5 °|
|G Seattube angle (eff.)||76,5 / 77 °||76,5 / 77 °||76,5 / 77 °||76,5 / 77 °||76,5 / 77 °|
|H BB Drop||16 / 8 mm||16 / 8 mm||16 / 8 mm||16 / 8 mm||16 / 8 mm|
|I Wheelbase||1164 mm||1188 mm||1212 mm||1241 mm||1265 mm|
|J Headtube length||110 mm||120 mm||130 mm||140 mm||150 mm|
|K BB height||342 / 350 mm||342 / 350 mm||342 / 350 mm||342 / 350 mm||342 / 350 mm|