The JEFFSY story began in 2016 with YT's first foray into 29" wheels. The concept was simple: design a reliable, confidence-inspiring trail bike.
Source: press release
This concept turned into a project and, with this, a campaign. “I Hate JEFFSY” has fueled speculation for the upcoming release, setting the scene with a wife complaining that her husband is never home, only to reveal that she's dating her new best friend: JEFFSY MK1. From there, JEFFSY MK2 sought a deeper connection with “Friendship Refined,” a monologue about trust and commitment read by none other than Christopher Walken. A hymn to friendship, if you will.
“The Power of Friendship” completes this long-awaited trilogy. Featuring '80s-inspired imagery, it sets the scene with two young friends who find themselves in a standoff in an alleyway before JEFFSY steps in to save the day. Nothing is out of reach when you work as a team: welcome the JEFFSY MK3.
Frame and features
With five sizes and aluminum/carbon availability, JEFFSY offers versatility and top performance at all prices. Positioning itself between the CAPRA and IZZO models, the updated frame features 29″ wheels and a progressive V4L suspension design that pairs 145mm of rear wheel travel with a 150mm fork. Geometry improvements improve balance: wheelbase is increased by 5mm across all sizes, while specific chainstay dimensions are now 437mm for SL sizes and 442mm for XL-XXL. The saddle angle maintains an effective 77 degrees when at the rider's average saddle height across all frame sizes, ensuring an efficient and comfortable pedaling position on longer journeys. 65 degree open head angle offering security and flip chip allowing 8mm bottom bracket height adjustment.