The JEFFSY Primus was created with smaller gravity riders in mind, with specific components. Initially available only in 24″ and 26″ options, the JEFFSY Primus now takes that size up to 27″, expanding the height range to 135cm – 165cm (or 4'5″ – 5'5″).
Source: YT press release
JEFFSY PRIMUS 24
The smallest travel in the PRIMUS range offers 130mm of travel on both the fork and shock. The fork is a Manitou Machete Junit and McLeod rear shock, both with custom curves and compression/rebound adjustability. Youth-specific SDG Slater bars, SDG Fly grips and seat enhance ergonomics, while 1mm SRAM X155 cranks, SRAM NX 11-speed shifting and four-piston G2 R brakes deliver a confident and controlled ride . SUN Ringle Duroc 30 wheels keep things rolling with the classic Maxxis DHF and DHR II tire combo.
JEFFSY PRIMUS 26
Next, the PRIMUS 26 has 140mm of travel, this time with the RockShox Reba fork and Deluxe Select rear shock. Steering is a basic E13 cockpit with ODI grips and an SDG Bel Air 3.0 saddle—the PRIMUS 26 also has a YT Postman 100mm dropper post for short legs. SRAM SX 12-speed derailleur with 11-50T cassette and 165mm cranks, while wheels and tires are the slightly larger version of its 24in stablemate.
JEFFSY PRIMUS 27
New to the range, the PRIMUS 27 is available with 150mm of travel and is capable of everything from all-mountain adventures to bike park sessions. Suspension is handled by RockShox Lyrik Base MY23 fork with Debonair+ air spring and Rush RC shock and Deluxe Select rear shock with custom tune. Following the PRIMUS 26, the E13 cockpit with ODI grips is also present here, along with a SRAM SX Eagle 12-speed drivetrain and 165mm crank arms. Chosen for slightly longer legs, the 125mm YT Postman dropper post and SDG Bel Air 3.0 improve flow and comfort on the trail, while the 35″ SUNRinglé Duroc 27,5 wheels are wrapped in Maxxis DHF and DHR II tires for a perfect grip in all conditions.