First look: YT’s Jeffsy Primus is a dream bike for young shredders!

A real performance mountain bike for emerging talent


YT Introduces JEFFSY PRIMUS 26″/24″

When it comes to going full send, YT has most riders covered. Now, YT has announced the JEFFSY PRIMUS for the shorter senders amongst us, which will be available from March in Europe and from mid-March in the US. The Young Talent bike comes with a best-in-class spec and 24’’ and 26’’ wheel size: A true performance MTB.

Related: Best mountain bikes for kids

No stopping the stoke on these two wheels!

Having an eye on Young Talent has been a major part of YT’s DNA since the very beginning. Signing Vali Höll to a development contract back in the day was already an early indication of YT’s dedication to junior athletes. Seven years later YT has welcomed a new Young Talent to the YT Family: Harry Schofield. The Brit is one of the biggest talents two-wheeled sports has to offer and he already had the chance to send it on the JEFFSY PRIMUS. The 24’’ and 26’’ inch bikes are aimed at short shredders with a height of 135cm-150cm and 145cm-160cm respectively.

“We are not toying around with this bike. We wanted to create a real performance mountain bike for the Young Talent out there. Creating a bike of this sort has been something we have been eyeing up for some time. After developing the custom bike for Harry and seeing how well he got on with it we knew we were on the right path and it is great to see this project become a reality.”
– Markus Flossmann, CEO YT Industries

Geometry and Specs 

Riders looking to step into gravity mountain biking want bikes that accommodate their needs. So, YT has equipped the JEFFSY PRIMUS with a rear shock with custom tune for lighter riders and also chosen handlebars, grips, saddles and seat posts that deliver the goods, so that the smallest mountain bikers can get the most out of their ride. Depending on the position of the Flip Chip both the 24’’ and 26’’ JEFFSY PRIMUS have a geometry boasting a slack head angle of 65.5°/66° for a comfortable yet truly aggressive position on the bike while ensuring a smooth ride and allowing for easy handling with plenty of style. Additionally, the aluminum frames have overcome the same testing procedures as all other YT bikes, while ensuring maximum stability and reliability.

“We built this bike utilizing our JEFFSY all-mountain bike platform, but with the intent to allow people of smaller stature to enjoy riding mountain bikes. Still, the JEFFSY PRIMUS has the same maximum rider weight as our other mountain bikes, resulting in the fact that it isn’t necessarily limited to just small, light riders and certainly has the capability for real off-road use. We worked with a variety of smaller riders to help us understand the specific needs. People will find that the bike has an active suspension, with a nice progression that lets you push the bike hard and a geometry that’s comfortable at all speeds. Being a smaller rider should not mean you have to sacrifice on durability or quality.”
– Chris Hilton, CTO YT Industries

This extremely playful performance bike has been developed with small shredders in mind and aims to enable them to go full send with their big buddies on the trails while proving to be an excellent climber on the way back up.

The JEFFSY PRIMUS JP 24 is spec’d with a mint Manitou Machete JUNIT fork with 130mm worth of travel and its rear counterpart the Manitou McLeod shock is custom-tuned for lighter riders. High-end handlebars, grips, saddles, and seatpost all come from SDG and the 11-speed NX drivetrain from SRAM enables smooth gear changing. The SRAM Guide R brakes with 160mm rotors deliver the braking power to manage speed well before tight corners and come to a halt at the end of the trail to finish with a stoked fist bump with the riding buddies before heading back up again.

The JEFFSY PRIMUS JP 26 has been developed for slightly taller shredders looking to send it with their mates. Fitted with a 140 mm Manitou Machete fork and RockShox Deluxe Select+ rear shock, this mountain bike is a mean machine. The 12-speed SX drivetrain from SRAM, paired with SRAM Guide R brakes, delivers high performance when it comes to shifting and braking.

Handling the bike is given thanks to ODI grips, E13 handlebars, and the ‘YT Postman’ dropper post makes sure the SDG saddle is out of harm’s way when riders hit the next downhill section. Both the JEFFSY PRIMUS JP 24 and 26 rely on MAXXIS Minion DHR II tires to deliver excellent grip in any conditions. Talking of conditions, even the muddiest and wettest days can’t stand in the way of a good shred in the woods, thanks to both bikes boasting the same high-end tech features as the JEFFSY.

These enable easy maintenance thanks to the single-sided hardware access and race-specific advanced sealing concept with double-sealed bearings that keep water and dirt at bay.

Pricing and Availability

The JEFFSY PRIMUS will be available from March in Europe and from mid-March in the US.

For more Information about YT Industries check out:



About the author: Jordan Villella

Jordan comes from the steep streets of Pittsburgh PA, where he learned to dodge cars and rip single track. He has been involved in nearly every aspect of the cycling industry: from turning wrenches, store design, clothing production and bike park creation. Jordan spends his free time racing cross country and cyclocross around North America, though he has been know to enduro every now and then. His love of cycling is only second to his love of his family and punk rock.

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