The JEFFSY 29 CF Comp is a hybrid: it features a lightweight carbon front triangle combined with a robust aluminum rear triangle. The efficient traction of the big wheels, the central seated position and the neutral behavior of the rear triangle help you get up the hill without wasting energy – you’ll need it when things point downhill again!
The slack headangle, long reach and 140 mm of suspension travel provide a fast and stable ride, while the progressive alloy rear linkage ensures a sensitive suspension action with lots of pop. Additionally, the low standover height and the compact chainstays optimize the handling to let you really take advantage of the 29er wheel. To keep the bike balanced in every size, the chainstays are longer on the XL and XXL. The result: JEFFSY lets you truly redefine your riding style.
Aside from the missing Kashima coating, the 140 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 29"
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
29“ x 27mm | 110x15mm | 148x12mm
HandlebarRenthal Fatbar 35
30mm Rise | 800mm
ColorEMBER ORANGE / NIGHT BLUE
EMBER ORANGE / NIGHT BLUE
CONCRETE GREY / BLACK MAGIC
Front Tiree*thirteen TRS Plus
29" | 2.35
StemRenthal Apex 35
Travel front/rear140mm / 140mm
Rear Tiree*thirteen TRS Plus
29" | 2.35
GripsODI Elite Motion
V2.1 | Lock On
Frame SizeS / M / L / XL / XXL
175mm | 32T BOOST
Weight*13,4 kg / 29,5 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 Deore XT
Shadow Plus | 11-Speed
Seatposte*thirteen TRS Plus
31.6mm | 125mm / 150mm / 170mm Drop
ForkFOX 34 Float Performance Elite
29“ | Fit 4 | 140mm | 44mm Rake
ShifterShimano Deore XT
SaddleSDG FLY MNT Cutout
YT Custom | Orange | Grey
ShockFOX Float DPS Performance Elite
3pos-Adj. | 210X50mm
Cassettee*thirteen TRS Plus
9-46T | 11-Speed
BrakesSRAM Guide R
ROTOR CENTERLINE | 200mm / 180mm
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
For an even better ride feel, the new JEFFSY 29 has a significantly longer reach than its predecessor and on the CF Pro Race model we also gave it 10 mm more travel. The seat tube angle has been made steeper for a more ergonomic seated position, so that even taller riders end up in the center of the bike and can fully benefit from the slack headangle. To apply YT’s Tailor Made concept also to the new JEFFSY 29, 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. The now even slacker headangle has a calming effect on the bike and gives you more control when things get steeper and faster. This is also exactly the point where the longer reach makes itself known, helping JEFFSY stay on track and making sure even taller riders can sit “in” the bike. 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||571 mm||592 mm||614 mm||637 mm||659 mm|
|B Reach||434 mm||454 mm||474 mm||494 mm||514 mm|
|C Stack||615 mm||620 mm||624 mm||633 mm||638 mm|
|D Seattube length||400 mm||415 mm||435 mm||460 mm||485 mm|
|E Chainstay length||435 mm||435 mm||435 mm||440 mm||440 mm|
|F Headtube angle||66,5 / 67 °||66,5 / 67 °||66,5 / 67 °||66,5 / 67 °||66,5 / 67 °|
|G Seattube angle (eff.)||77,5 / 78 °||77,5 / 78 °||77,5 / 78 °||77,5 / 78 °||77,5 / 78 °|
|H BB Drop||35 / 27 mm||35 / 27 mm||35 / 27 mm||35 / 27 mm||35 / 27 mm|
|I Wheelbase||1171 mm||1193 mm||1215 mm||1244 mm||1266 mm|
|J Headtube length||100 mm||105 mm||110 mm||120 mm||125 mm|
|K BB height||341 / 349 mm||341 / 349 mm||341 / 349 mm||341 / 349 mm||341 / 349 mm|