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Size

Color

Version

Thirstmaster 4000 bottle set

Thirstmaster 4000 bottle set

Crankbrothers STAMP 7 Large Pedal

Crankbrothers STAMP 7 Large Pedal

mech hanger set JEFFSY MK2 & DECOY MK1 & PRIMUS MK1

mech hanger set JEFFSY MK2 & DECOY MK1 & PRIMUS MK1

Crankbrothers Gem Hand Pump

Crankbrothers Gem Hand Pump

Crankbrothers F15 Multitool

Crankbrothers F15 Multitool

Thirstmaster 4000 bottle set

Thirstmaster 4000 bottle set

Crankbrothers STAMP 7 Large Pedal

Crankbrothers STAMP 7 Large Pedal

mech hanger set JEFFSY MK2 & DECOY MK1 & PRIMUS MK1

mech hanger set JEFFSY MK2 & DECOY MK1 & PRIMUS MK1

Crankbrothers Gem Hand Pump

Crankbrothers Gem Hand Pump

Crankbrothers F15 Multitool

Crankbrothers F15 Multitool

Core
27
29
27
29
ALL MOUNTAIN

CORE 2 stands for a versatile platform with a smart parts specification that combines performance and efficiency. The JEFFSY CORE 2 will please both beginners and experts alike, with its high-end aluminum frame. These robust bikes are ready for the toughest missions, thanks to high-quality components and uncomplicated suspension elements. Regardless of whether you want to go out for a quick rip or a long bike trip – with the JEFFSY CORE 2 you’ll be ready for anything.

CORE 2

Choose Yours

Wheels
Color
Size
Core

CORE 2

Wheel size
27
29
Color / Size

inch

cm

154cm-165cm

164cm-175cm

174cm-184cm

183cm-193cm

192cm-202cm

Metal Silver

S

June 2032

M

April 2032

L

June 2032

XL

June 2032

XXL

June 2032

Black Magic

S

March 2032

M

June 2032

L

March 2032

XL

June 2032

XXL

In Stock

Size

This bike has the earliest arrival

All Available Options

See Other Options

2,999.00 €

Notify Me!

#Size
Doesn't
Matter

Shred
Downhill
Uphill

27

29

No question about it; The JEFFSY 29 is the most aggressive and agile 29er on the market. The large 29“ wheels compliment the compact frame‘s silhouette perfectly and are also responsible for the significant amount of BB drop - leaving you low in the sweet spot of the bike, feeling right at home and perfectly in control even in the wildest situations. The larger tire contact patch provides outstanding grip and unheard-of traction and drive, which you will really appreciate while racking up the kilometers during long backcountry adventures. When it comes to high-speed descending, the big wheels increase stability and keep you on track even on the roughest trails. The increased diameter reduces harshness and helps the wheels roll more easily over rocks and roots. 

Tech + Specs
  • Frame

  • Flip chip

  • Protection

  • Bearings

  • Chainsuck

  • Headtube

  • Internal Cable Routing

  • Virtual Four Link

Frame

Flip chip

Situated at the lower shock mount, the Flip Chip makes it quick and easy to adjust the geometry according to the terrain and riding style. The low position provides for a more aggressive headtube angle and a bigger BB drop, ideal for fast and rough tracks. In the high position, the headtube angle is 0.5 degrees steeper and the BB is higher. The higher BB gives more ground clearance and better performance on longer steep climbs.

Protection

Made from super-tough and wear-resistant PA 66, the downtube protector is bolted on and can be easily replaced. It is designed to wrap around the bottom bracket and thus provide extra protection for the side walls of the downtube from impacts and scratches. Additionally, the rubber chainstay and seatstay guards help prevent unwanted noise from the drivetrain.

Bearings

Extra seals protect the high-quality, double-sealed full complement bearings to keep water and dirt out and help prolong the service life.

Chainsuck

The inconspicuous chainsuck plates protect the frame from damage caused by a dropped chain. This keeps sensitive areas out of harm's way and helps prolong the frame's durability.

Headtube

To optimize the weight to performance ratio, the contact surfaces for the integrated headset are pre-formed directly in the frame. Additionally, the ZeroStack design ensures a high level of durability thanks to the integrated bearing shells.

Internal Cable Routing

For optimal protection, all cables are routed almost completely through the frame. Uninterrupted internal tubes provide for easy cable replacement and also help prevent unwanted noise. Small ridges ensure the cable plugs sit tight in the frame to seal the cable ports and a cable clamp holds them securely in place as they exit the frame under the rocker link.

Virtual Four Link

Our award-winning V4L suspension technology provides sensitivity off the top, with good mid-stroke support and plenty of end-stroke progressivity. The nice pop helps get the bike airborne whenever wanted, while the end-stroke progressivity makes sure the rear shock doesn't bottom out even on monster jumps. The high amount of anti-squat keeps the rear suspension neutral and improves pedal efficiency.

Flip chip

Flip chip

Situated at the lower shock mount, the Flip Chip makes it quick and easy to adjust the geometry according to the terrain and riding style. The low position provides for a more aggressive headtube angle and a bigger BB drop, ideal for fast and rough tracks. In the high position, the headtube angle is 0.5 degrees steeper and the BB is higher. The higher BB gives more ground clearance and better performance on longer steep climbs.

Protection

Protection

Made from super-tough and wear-resistant PA 66, the downtube protector is bolted on and can be easily replaced. It is designed to wrap around the bottom bracket and thus provide extra protection for the side walls of the downtube from impacts and scratches. Additionally, the rubber chainstay and seatstay guards help prevent unwanted noise from the drivetrain.

Bearings

Bearings

Extra seals protect the high-quality, double-sealed full complement bearings to keep water and dirt out and help prolong the service life.

Chainsuck

Chainsuck

The inconspicuous chainsuck plates protect the frame from damage caused by a dropped chain. This keeps sensitive areas out of harm's way and helps prolong the frame's durability.

Headtube

Headtube

To optimize the weight to performance ratio, the contact surfaces for the integrated headset are pre-formed directly in the frame. Additionally, the ZeroStack design ensures a high level of durability thanks to the integrated bearing shells.

Internal Cable Routing

Internal Cable Routing

For optimal protection, all cables are routed almost completely through the frame. Uninterrupted internal tubes provide for easy cable replacement and also help prevent unwanted noise. Small ridges ensure the cable plugs sit tight in the frame to seal the cable ports and a cable clamp holds them securely in place as they exit the frame under the rocker link.

Virtual Four Link

Virtual Four Link

Our award-winning V4L suspension technology provides sensitivity off the top, with good mid-stroke support and plenty of end-stroke progressivity. The nice pop helps get the bike airborne whenever wanted, while the end-stroke progressivity makes sure the rear shock doesn't bottom out even on monster jumps. The high amount of anti-squat keeps the rear suspension neutral and improves pedal efficiency.

sGeometry Sizefinder
S
154 cm - 165 cm | 5'1" - 5'5"
M
164 cm - 175 cm | 5'4.5" - 5'9"
L
174 cm - 184 cm | 5'8" - 6'0.5"
XL
183 cm - 193 cm | 6'0" - 6'4"
XXL
192cm - 202cm | 6'3.5" - 6'8"

This size table is only a suggestion. The optimal frame size depends also on your personal riding style.

Toptube
Reach
Stack
Seattube
Chainstay
Headtube Angle
Seattube Angle (eff)
bb drop
wheelbase
headtube
bb height
Standover height

s

m

l

xl

xxl

Toptube
567 mm
590 mm
613 mm
636 mm
660 mm
Reach
422 mm
442 mm
462 mm
482 mm
502 mm
Stack
598 mm
608 mm
617 mm
626 mm
635 mm
Seattube
395 mm
415 mm
435 mm
460 mm
485 mm
Chainstay
432 mm
432 mm
432 mm
437 mm
437 mm
Headtube Angle
65,5° / 66°
65,5° / 66°
65,5° / 66°
65,5° / 66°
65,5° / 66°
Seattube Angle (eff)
76,5° / 77°
76,5° / 77°
76,5° / 77°
76,5° / 77°
76,5° / 77°
bb drop
13 / 6 mm
13 / 6 mm
13 / 6 mm
13 / 6 mm
13 / 6 mm
wheelbase
1167 mm
1191 mm
1215 mm
1244 mm
1268 mm
headtube
110 mm
120 mm
130 mm
140 mm
150 mm
bb height
344 / 352 mm
344 / 352 mm
344 / 352 mm
344 / 352 mm
344 / 352 mm
Standover height
676 mm
684 mm
697 mm
711 mm
726 mm
 

s

m

l

xl

xxl

Toptube
567 mm
590 mm
613 mm
636 mm
660 mm
Reach
422 mm
442 mm
462 mm
482 mm
502 mm
Stack
598 mm
608 mm
617 mm
626 mm
635 mm
Seattube
395 mm
415 mm
435 mm
460 mm
485 mm
Chainstay
432 mm
432 mm
432 mm
437 mm
437 mm
Headtube Angle
65,5° / 66°
65,5° / 66°
65,5° / 66°
65,5° / 66°
65,5° / 66°
Seattube Angle (eff)
76,5° / 77°
76,5° / 77°
76,5° / 77°
76,5° / 77°
76,5° / 77°
bb drop
13 / 6 mm
13 / 6 mm
13 / 6 mm
13 / 6 mm
13 / 6 mm
wheelbase
1167 mm
1191 mm
1215 mm
1244 mm
1268 mm
headtube
110 mm
120 mm
130 mm
140 mm
150 mm
bb height
344 / 352 mm
344 / 352 mm
344 / 352 mm
344 / 352 mm
344 / 352 mm
Standover height
676 mm
684 mm
697 mm
711 mm
726 mm
Jeffsy CORE Manual

Jeffsy CORE Manual

PDF | 6.48 MB

Choose Your jeffsy

CORE 4

29

5,199.00 €
Frame Carbon 150mm
Fork FOX 36 FLOAT FACTORY
Shock FOX FLOAT DPX2 FACTORY
Drivetrain SRAM X01 EAGLE
Go to bike

CORE 3

29

4,199.00 €
Frame Carbon 150mm
Fork FOX 36 FLOAT PERFORMANCE ELITE
Shock FOX FLOAT DPX2 PERFORMANCE ELITE
Drivetrain SRAM GX EAGLE
Go to bike

CORE 2

27

29

2,999.00 €
Frame Alloy 160mm
Fork FOX 36 Float Performance
Shock FOX FLOAT DPX2 PERFORMANCE
Drivetrain SRAM NX EAGLE
Go to bike

UNCAGED 6

29

8,999.00 €
Frame Carbon 150mm
Fork ROCKSHOX LYRIK ULTIMATE FLIGHT ATTENDANT
Shock ROCKSHOX SUPERDELUXE ULTIMATE FLIGHT ATTENDANT
Drivetrain SRAM XX1 EAGLE AXS
Go to bike

UNCAGED 8

29

5,499.00 €
Frame Carbon 150mm
Fork CANE CREEK HELM MK2
Shock CANE CREEK KITSUMA AIR
Drivetrain SRAM GX EAGLE AXS
Go to bike
Alternatives

YT
Range

E-MTB All Mountain
All Mountain
Enduro
YOU ARE LOOKING FOR AN ALTERNATIVE?

If you're wondering whether this is exactly the right bike for you, it might be worth checking out a different category as well.