The JEFFSY PRIMUS - no bullshit, no bedtime stories - but a real MTB for motivated young riders. In function and handling, it's as capable as its big brother JEFFSY, but in a smaller size. Whether you're headed out for an enduro loop, a day in the bike park or a jump line session, the JEFFSY PRIMUS lets you go really big regardless of how big you are. Get some, little shredders!
Jeffsy Primus
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The JEFFSY PRIMUS JP 24 is a playful and fast bike for riders between 135 cm and 150 cm who are hunting fun. The aluminum frame and all components have been customized to deliver outstanding climing capability and the aggressive downhill performance everyone expects from a YT. Whether you like to go on long adventures or just shred the bike park, the Manitou machete JUNIT fork and custom-tuned Manitou McLeod shock make the JEFFSY PRIMUS JP 24 the perfect YT for young gravity seekers.
CHOOSE
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Material
Alloy
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Suspension
100mm
- Frame
- Size & Geometry
- Specifications
- Downloads
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Frame
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Protection
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Headtube
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Internal Cable Routing
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Chainsuck protection
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Bearings
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Virtual Four Link
◀ 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.
◀ 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.
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.
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.
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.
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.
This size table is only a suggestion. The optimal frame size depends also on your personal riding style.
one-size
one-size
The AL model was developed specifically for lovers of high-quality aluminum bikes. The elaborately-designed frame sets new standards in aluminum workmanship: the multi-butted, hydroformed tubes don't only keep weight down and improve resilience, but embody the look of a true YT. High performance at an attractive price is the focus here.