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YT Jeffsy Core 4 Review

YT Jeffsy Core 4 Review
YT Jeffsy Core 4 Review
YT Jeffsy Core 4 Review

YT Jeffsy Core 4 Review

Price: 4999 €
category: All Mountain
Frame Material: Carbon
Weight: 15,4 kg
Wheel Size: 29"
Travel Front: 150 mm
Travel Rear: 145 mm
Model Year: 2024
  • UDH
  • strorage compartment
  • chainstays grow with frame size
  • asymmetric frame design
  • coherent overall package
  • definately shredable in the downhill
  • great groupset for this price range
  • 5 years warranty
  • 15,4 kg - a bit heavy
fun to ride in
easy terrain extreme terrain
seating position
upright efficient
handling
playful easy calm
framesize runs
small big
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Expirience with the YT Jeffsy Core 4

YT Jeffsy Core 4 Review
Ludwig Döhl
Tattooed models, casual image, good price. That's what YT is always associated with. The Franconians are also placing the new edition of the Jeffsy Core 4 under the motto "Power of Friendship. If you break the marketing slogan down to the technology, it becomes clear: The new Jeffsy does not want to charm its rider with the latest features and trends, but builds on friendly values such as reliability and good nature. Even if the differences to the predecessor are not groundbreaking, the geometry is nevertheless flatter and the storage compartment in the down tube offers space for spare parts for the first time. With a flat 65 degree head tube angle and a long reach, the geometry corresponds to the current trend. Anyone who has no special preferences for the seating position can´t go wrong with the YT Jeffsy Core 4. Because the saddle takes the balanced approach. When viewing the 15,4 kg, its apparent: there are lighter All Mountains in this price range. The YT Jeffsy Core 4 shows what its capable of in the downhill. The guarantee of 5 years proves that YT is behind its products.

Geometry

Je steiler der Winkel des Sitzrohrs ist, desto effizienter können Sie in die Pedale treten.

SIZE XXS XS S M L XL XXL
Sizing of Manufacturer
-
-
S
M
L
XL
-
Wheelsize
-
-
29
29
29
29
29
Stack
-
-
613
620
627
634
642
Reach
-
-
435
455
475
495
515
Top Tube Length
-
-
578
593
609
627
645
Seat Tube Length
-
-
385
410
435
460
485
Seat Tube Angle
-
-
77,2
77,2
77,2
77,2
77,2
Head Tube Length
-
-
100
108
116
124
132
Head Tube Angle
-
-
65
65
65
65
65
Bottom Bracket Drop
-
-
33
33
33
33
33
Bottom Bracket Height (absolut)
-
-
343
343
343
343
343
Chainstay Length
-
-
437
437
437
442
442
Wheelbase
-
-
1191
1214
1238
1266
1289
Standover Height
-
-
-
-
-
-
-
Specification
  • Frame High Modulus Carbon Frame V4L | 145 mm | 148 x 12 mm | YT Thru Axle I UDH
  • Frame Material Carbon
  • Fork ROCKSHOX Lyrik Ultimate 29“ | 150 mm | Charger 3 | 15x110 mm | 44 mm Offset
  • Spring Unit air
  • Remote-Lockout no
  • Damper ROCKSHOX SDLX Ultimate 210 x 55 mm | RC2T | 0L2 Volume Reducer
  • Gearrange 520%
  • Drivetrain 1x12
  • Gear Lever SRAM GX Eagle AXS Controller 12-Speed | 2 Button | MMX
  • Rear Derailleur SRAM GX Eagle Transmission 12-Speed | T-Type
  • Crank SRAM GX Eagle Transmission 170 mm | T-Type | 32T | 2 Guards | DUB
  • Cassette SRAM GX Eagle Transmission 10-52T | T-Type | 12-Speed
  • Brake Set SRAM Code RSC Rotor CENTERLINE 200 mm I 200 mm
  • Brake Rotors 200/200
  • Wheel Set CRANKBROTHERS Synthesis Enduro Alloy 29’’ 31,5 mm I 110 x 15 mm I 6-Bolt I I9 1/129’’ 29,5 mm | 148 x 12 mm I 6-Bolt | XD
  • Tires Front MAXXIS Minion DHF, 29’’ x 2.5 WT I 3C MaxxTerra I EXO+ I TR
  • Tires Rear MAXXIS Minion DHR II, 29’’ x 2.4 WT | 3C MaxxTerra | EXO+ | TR
  • Saddle SDG BEL Air 3.0 140 mm I Lux-Alloy Rail I YT Custom Design
  • Seat Post YT POSTMAN V2 Ø 31,6mm I MMX-Remote | Adjustable drop 25/10/5mm
  • Stem RENTHAL Apex 35 50 mm | +/-6° | Black/Black
  • Handle Bar RENTHAL AL2014 780 mm | 7° Back | 5° Up | 6061 AL I 30 mm Rise | Black
  • Handle Bar Width 780
  • Head Set CANE CREEK Series 40 ZS44 ZS56 | High Cap | 2 Spacer 5mm

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About the author

Ludwig

Ludwig

... has spent more than 100,000 kilometers in the saddle of over 1000 different mountain bikes. The essence of many hours on the trail: Mountain bikes are awesome when they match your personal preferences! With this realization, he founded bike-test.com to assist cyclists in finding their very own dream bike.

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