JEFFSY® CF One 29
includes import tax & duty
JEFFSY is ready to be your new bro and wingman. You’re going to be the new dream team. Whether on your home trails or crossing high mountains, JEFFSY scales the toughest peaks with unbelievable drive and traction, and inspires you to unexpected performances. JEFFSY lets you discover the most remote locations, climb the highest peaks, and keep it pinned on the way back down. Because JEFFSY is the YT of All Mountain bikes, it won’t hold you back even in the roughest terrain. Thanks to its gravity oriented geometry JEFFSY remains agile and playful, even with the 29” wheels. And to meet our high design standards we gave JEFFSY super compact proportions – you two are going to get a lot of looks!
JEFFSY’s voluminous but light full carbon frame and its compact silhouette already have some observers doubting whether they are actually looking at a 29er. With its aggressive headtube angle, low stand over height and compact chain stays JEFFSY is a player among trail bikes, ready to go fast and get loose in the roughest of terrain. The length of the rear triangle comes optimized for each frame size and ensures a completely new and atypical handling for a 29er.
Thanks to the flip chip technology, JEFFSY’s geometry can be perfectly adapted to different terrain and to your style of riding. The low position gives you a more aggressive headtube angle and a bigger BB drop – perfect for quick and grimy downhill sections. The high position provides a smaller BB drop, so you can blast trails and tight turns with more ground clearance. Our prized Virtual 4 Link suspension technology is present on JEFFSY as well; sensitive, progressive, with lots of mid-travel support. This does not only give you the confidence needed for big gaps and rugged terrain but also makes pedaling a lot more efficient. The tube walls are thicker in critical areas to make sure the frame can handle the abuse, and integrated protectors keep the downtube and chain stays out of harm’s way when the action heats up.
Our gravity background runs deep in the specs of the JEFFSY CF One as well: The potent Pike RCT3 fork and Monarch RT3 shock from RockShox are ready to take on any root nest or rock garden, and the wide bar of the Race Face cockpit gives you maximum control on wild descents. SRAM’s Guide RS brakes provide ultimate stopping power and the 1x11 drivetrain lets you easily shift into the next gear.
FrameJEFFSY Carbon 29"
high modular carbonfiber frame, V4L Virtual 4-Link rear suspension, 148x12mm DT Swiss QR Thru axle, down tube/seat stay/chain stay protection
Rear DerailleurSRAM X1
11spd, Type 2.1, aluminum, cage lock, black
Wheelsete*thirteen TRS 29"
29", FW 15x100 Thru axle, RW 12x148 Thru Axle, XD Driver
ShockRockShox Monarch RT3
air shock, high volume air-can, 3 position compression (open, pedal, lock), external rebound, 7,875"x2,25"/ 200mmx57mm
Front TireOnza Ibex
29"x2,4", FRC 55a, 120 tpi
ForkRockShox Pike RCT3
air fork, solo air, Charger RCT3 damper cartridge, 3-position compression (low/mid/firm), low-speed compression, rebound, tapered steerer, 15x100 QR Thru axle, 140mm travel
CassetteSRAM XG 1150
11spd, 10-42 teeth
Rear TireOnza Ibex
29"x2,4", FRC 55a, 120 tpi
Travel front/rear140mm / 140mm
11spd, with PowerLock
StemRACE FACE Turbine
35mm clamp, 50mm (S/M), 60mm (L/XL)
IS42 | 28,6 / IS52 | 40
BrakesSRAM Guide RS
4-piston caliper, tool-free reach adjust, SwingLink lever, Bleeding Edge technology, DOT 5.1
HandlebarRACE FACE Turbine 35
35mm clamp, 770mm wide, 35mm rise, 8° backsweep, 5° upsweep
CranksetRACE FACE Turbine
175mm, 32t direct mount, BB92
Discs front/rearSRAM Centerline 200mm / 180mm
SeatpostRACE FACE Turbine
internal cable routing, S: 375mm/125mm travel, M,L, XL: 440mm/150mm travel, 31,6mm
Bottom BracketRACE FACE
GripsThe Sensus Lite
SaddleSDG Fly MTN
custom YT Logo
Pedalswithout / ohne
At the end of the ordering process, you can add high-quality pedals at special rates to your shopping cart.
Frame SizeS / M / L / XL
for the size that suits you best, please check the sizing-chart above
Weight12,8 kg / 28,2 lb
*Weight measured without pedals in frame size S. Due to manufacturing tolerances of the individual components the bike weight may differ +/- 2%.
*Please note that the pictures may differ from the actual specifications.
|A Toptube length||571 mm||592 mm||616 mm||637 mm|
|B Reach||405 mm||425 mm||445 mm||465 mm|
|C Stack||605 mm||610 mm||623 mm||628 mm|
|D Seattube length||400 mm||440 mm||480 mm||520 mm|
|E Chainstay length||435 mm||435 mm||440 mm||440 mm|
|F Headtube angle low/high||67 / 67,5 °||67 / 67,5 °||67 / 67,5 °||67 / 67,5 °|
|G Seattube angle (eff.) low/high||74,5 / 75 °||74,5 / 75 °||74,5 / 75 °||74,5 / 75 °|
|H BB Drop low/high||32/24 mm||32/24 mm||32/24 mm||32/24 mm|
|I Wheelbase||1132 mm||1154 mm||1178 mm||1205 mm|
|J Headtube length||90 mm||95 mm||110 mm||115 mm|
|K Steerer tube length||551 mm||551 mm||551 mm||551 mm|
|L Fork offset||46 mm||46 mm||46 mm||46 mm|
The perfect match: JEFFSY and the THIRSTMASTER 3000.