The new JEFFSY makes light work of both the climbs and the downhills. Every detail on the range-topping JEFFSY 27 CF Pro Race is designed for pure performance and the high-quality spec makes it the first choice for racers and experienced pro riders alike. With its potent 160 mm suspension package from FOX, generous reach and slack headangle it is ready to tackle any obstacle, which makes it particularly suitable for aggressive trail riding and enduro racing.
The V4L kinematics provide ample mid-stroke support and plenty of end-stroke progressivity, which explains JEFFSY’s appetite for jumping. The compact chainstays and the 27“ wheels give JEFFSY its playful character and help you navigate the tightest of turns with ease. To ensure consistent handling across all the frame sizes, we made the chainstays longer on the XL and XXL. The result: JEFFSY lets you truly redefine your riding style.
With a no-compromise component spec, the JEFFSY 27 CF Pro Race is the prime choice for racers and experienced pro riders alike. The FOX 36 Float Factory fork and FOX Float DPX2 Factory shock are extremely responsive and provide pro-level adjustment possibilities. The stiff TRSr crank gives the drive train a direct feel, while Shimano‘s crisp and precise XTR shifting ensures you are always in the right gear to put the power down on the trail.
The awesome modulation of SRAM‘s Guide RSC brakes helps you stay in control even on steep slopes and in tight turns, while the stiff Renthal Fatbar Carbon and Renthal Apex cockpit combo lets you steer your bike with confidence. FOX’s Kashima-coated Transfer Factory dropper post provides stepless height adjustment to let you put your saddle exactly where you need it to be.
FrameJEFFSY CARBON 27,5"
high modular carbonfiber frame, V4L Virtual 4-Link rear suspension, 148x12mm DT Swiss QR Thru axle, down tube/seat stay/chain stay protection
Wheelsete*thirteen TRS Race
27,5“ x 28mm | 110x15mm | 148x12mm
HandlebarRenthal Fatbar Carbon 35
Gold | 30mm Rise | 800mm
ColorDEEP PETROL / SILVER
DEEP PETROL / SILVER
MATTE BLACK / GLOSSY BLACK / SILVER
Front Tiree*thirteen TRS Race
27,5" | 2.35
StemRenthal Apex 35
Travel front/rear160mm / 160mm
Rear Tiree*thirteen TRS Plus
27,5" | 2.35
Frame SizeS / M / L / XL / XXL
Cranksete*thirteen TRS Race Carbon
175x73mm | 32T Boost
Weight*12,7 kg / 28,0 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 XTR
Shadow Plus | 11-Speed
SeatpostFOX TRANSFER Factory
31.6mm | 125mm / 150mm Drop
ForkFOX 36 Float Factory
160mm | Grip 2 | 15QRx110 | 44mm Rake
SaddleSDG FLY MNT Cutout
YT Custom | Orange | Grey
ShockFOX Float DPX2 Factory
3pos-Adj | 230x65mm
Cassettee*thirteen TRS Plus
9-46T | 11-Speed
BrakesSRAM Guide RSC
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.
Chainguidee*thirteen TRS Race SL
I05 2 bolt | 28-36T | Compact Slider
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||567 mm||590 mm||613 mm||636 mm||660 mm|
|B Reach||422 mm||442 mm||462 mm||482 mm||502 mm|
|C Stack||598 mm||608 mm||617 mm||626 mm||635 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||65,5 / 66 °||65,5 / 66 °||65,5 / 66 °||65,5 / 66 °||65,5 / 66 °|
|G Seattube angle (eff.)||76,5 / 77 °||76,5 / 77 °||76,5 / 77 °||76,5 / 77 °||76,5 / 77 °|
|H BB Drop||13 / 6 mm||13 / 6 mm||13 / 6 mm||13 / 6 mm||13 / 6 mm|
|I Wheelbase||1167 mm||1191 mm||1215 mm||1244 mm||1268 mm|
|J Headtube length||110 mm||120 mm||130 mm||140 mm||150 mm|
|K BB height||344 / 452 mm||344 / 452 mm||344 / 452 mm||344 / 452 mm||344 / 452 mm|