The latest YT news

BE THE FIRST TO BE UPDATED

JOIN OUR MAILING LIST NOW

By registering for our newsletter, you acknowledge the privacy statement.

We've added the following to your cart:

Size

Color

Version

26
26
JUNIOR

The world of mountain biking is exploding with Young Talent, and the JEFFSY PRIMUS 26 is here to champion it. Developed for riders between 145cm and 160cm tall, it’s a YT through and through and a sure-fire hit with any rising trail superstar. From the shred-ready SRAM drivetrain to the Maxxis Minion tires, there are no compromises here – this is a hard-hitting ride that’s every bit as capable as its big brother JEFFSY!

The RockShox suspension is easily adjustable to suit a range of rider weights and provides 140mm of rut-chomping suspension travel in the front and rear. The sturdy SUNRinglé wheels stay true for overcooked sends and sideways landings, and a 100mm Postman dropper boosts standover for rowdy descending.

Choose Your

Wheels
Color
Size

26

Wheel size
26
Color / Size

Choose Your Wheel Size

Choose Your Frame Size

inch

cm

145cm-160cm

Deep Yellow

This bike has the earliest arrival

All Available Options

See Other Options

$2,179.00

$3,099.00
Notify Me!
Total Amount Without Sales Tax:
Tech + Specs
  • Frame

  • FRAME PROTECTION

  • Headtube

  • Internal Cable Routing

  • Chainsuck protection

  • SEALED BEARINGS

  • Virtual Four Link

Frame

FRAME 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.

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. They are guided through the chainstay with internal cable tubes, while they are wrapped in foam as they pass through the main frame to reduce weight and at the same time prevent noise. All cable ports are protected against the ingress of dirt and water with cable plugs. Additionally, the cables are secured on the head tube with cable clamps and they are routed over the main pivot to prevent chafing.

Chainsuck protection

The inconspicuous chainsuck plates protect the frame from damage caused by a dropped chain keeping critical areas out of harm's way.

SEALED BEARINGS

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

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.

FRAME PROTECTION

FRAME 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.

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. They are guided through the chainstay with internal cable tubes, while they are wrapped in foam as they pass through the main frame to reduce weight and at the same time prevent noise. All cable ports are protected against the ingress of dirt and water with cable plugs. Additionally, the cables are secured on the head tube with cable clamps and they are routed over the main pivot to prevent chafing.

Chainsuck protection

Chainsuck protection

The inconspicuous chainsuck plates protect the frame from damage caused by a dropped chain keeping critical areas out of harm's way.

SEALED BEARINGS

SEALED BEARINGS

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

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.

One Size
145 cm - 160 cm | 4'9" - 5'3"

Toptube
Reach
Stack
Seattube
Chainstay
Headtube Angle
Seattube Angle (eff)
BB Drop low/<br>high
wheelbase
headtube
BB Height

one-size

Toptube
533 mm
Reach
397 mm
Stack
549 mm
Seattube
355 mm
Chainstay
415 mm
Headtube Angle
65,5° / 66°
Seattube Angle (eff)
76,5° / 77°
BB Drop low/
high
-5 / 4mm
wheelbase
1105 mm
headtube
95 mm
BB Height
340 / 349 mm
 

one-size

Toptube
533 mm
Reach
397 mm
Stack
549 mm
Seattube
355 mm
Chainstay
415 mm
Headtube Angle
65,5° / 66°
Seattube Angle (eff)
76,5° / 77°
BB Drop low/
high
-5 / 4mm
wheelbase
1105 mm
headtube
95 mm
BB Height
340 / 349 mm
Primus 2021

Primus 2021

PDF | 5.58 MB

Choose Your Jeffsy Primus

24

24

2179
2799
Frame Alloy 130mm
Fork MANITOU MACHETE JUNIT
Shock MANITOU MCLEOD
Drivetrain SRAM NX
Go to bike

26

26

2179
3099
Frame Alloy 140 mm
Fork ROCKSHOX REBA
Shock ROCKSHOX DELUXE SELECT
Drivetrain SRAM SX EAGLE
Go to bike

27

27

2349
3349
Frame Alloy 150mm
Fork ROCKSHOX LYRIK BASE
Shock ROCKSHOX DELUXE SELECT
Drivetrain SRAM SX EAGLE
Go to bike
Alternatives

YT
Range

Dirt
Junior
YOU ARE LOOKING FOR AN ALTERNATIVE?

Not sure if this is the perfect fit? Go ahead and browse more models!