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Size

Color

Version

Thirstmaster 4000 bottle set

Thirstmaster 4000 bottle set

$49.99

Crankbrothers STAMP 7 Large Pedal

Crankbrothers STAMP 7 Large Pedal

$119.99

mech hanger set JEFFSY MK2 & DECOY MK1 & PRIMUS MK1

mech hanger set JEFFSY MK2 & DECOY MK1 & PRIMUS MK1

$19.99

Core
29
29
ALL MOUNTAIN

Want to pin it? Then you want the JEFFSY CORE 3! Carefully selected premium, durable components on high-end carbon frames, with fully adjustable suspension elements that deliver exactly the level of performance that ambitious riders are looking for. These outstanding builds give you everything you need to conquer any challenge on the mountain – unlimited fun on your trails, guaranteed.

CORE 3

Choose Yours

Wheels
Color
Size
Core

CORE 3

Wheel size
29
Color / Size

Choose Your Wheel Size

Choose Your Frame Size

inch

cm

5'1" - 5'5"

5'4.5" - 5'9"

5'8" - 6'0.5"

6'0" - 6'4"

6'3.5" - 6'8"

Assault Green

S

September 2032

M

September 2032

L

September 2032

XL

September 2032

XXL

In Stock

Black Magic

S

September 26, 2022

M

September 2032

L

September 2032

XL

September 26, 2022

XXL

In Stock

This bike has the earliest arrival

All Available Options

See Other Options

$4,199.00

Notify Me!
Total Amount Without Sales Tax:
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
572 mm
593 mm
615 mm
638 mm
660 mm
Reach
430 mm
450 mm
470 mm
490 mm
510 mm
Stack
618 mm
622 mm
627 mm
636 mm
640 mm
Seattube
400 mm
415 mm
435 mm
460 mm
485 mm
Chainstay
435 mm
435 mm
435 mm
440 mm
440 mm
Headtube Angle
66° / 66,5°
66° / 66,5°
66° / 66,5°
66° / 66,5°
66° / 66,5°
Seattube Angle (eff)
77° / 77,5°
77° / 77,5°
77° / 77,5°
77° / 77,5°
77° / 77,5°
bb drop
32 / 24 mm
32 / 24 mm
32 / 24 mm
32 / 24 mm
32 / 24 mm
wheelbase
1174 mm
1196 mm
1218 mm
1247 mm
1269 mm
headtube
100 mm
105 mm
110 mm
120 mm
125 mm
bb height
344 / 352 mm
344 / 352 mm
344 / 352 mm
344 / 352 mm
344 / 352 mm
Standover height
706 mm
702 mm
701 mm
693 mm
694 mm
 

s

m

l

xl

xxl

Toptube
572 mm
593 mm
615 mm
638 mm
660 mm
Reach
430 mm
450 mm
470 mm
490 mm
510 mm
Stack
618 mm
622 mm
627 mm
636 mm
640 mm
Seattube
400 mm
415 mm
435 mm
460 mm
485 mm
Chainstay
435 mm
435 mm
435 mm
440 mm
440 mm
Headtube Angle
66° / 66,5°
66° / 66,5°
66° / 66,5°
66° / 66,5°
66° / 66,5°
Seattube Angle (eff)
77° / 77,5°
77° / 77,5°
77° / 77,5°
77° / 77,5°
77° / 77,5°
bb drop
32 / 24 mm
32 / 24 mm
32 / 24 mm
32 / 24 mm
32 / 24 mm
wheelbase
1174 mm
1196 mm
1218 mm
1247 mm
1269 mm
headtube
100 mm
105 mm
110 mm
120 mm
125 mm
bb height
344 / 352 mm
344 / 352 mm
344 / 352 mm
344 / 352 mm
344 / 352 mm
Standover height
706 mm
702 mm
701 mm
693 mm
694 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

29

27

$2,999.00
Frame Alloy 150mm
Fork FOX 36 FLOAT PERFORMANCE
Shock FOX FLOAT DPX2 PERFORMANCE
Drivetrain SRAM NX EAGLE
Go to bike

UNCAGED 6

29

$9,499.00
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

$5,999.00
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.