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YT’s JEFFSY trail MTB has received some updated build specs for 2025. The JEFFSY CORE range’s four build options have been revised and now include carbon or aluminum frame options for the mid-spec models. The highest-end model sticks with a carbon frame and the entry-level bike is available in aluminum only.
YT now equips the JEFFSYs with Hayes Dominion A4 disc brakes on all but the base model, options for SRAM T-Type drivetrains, and carbon wheels on the highest-end CORE 4 bike. YT JEFFSY Key Specs:
YT JEFFSY, side, forest The JEFFSY is a trail-focused MTB, designed to offer balanced capabilities on both climbs and descents. This mid-travel rig offers 145mms of rear travel, controlled by YT’s V4L linkage. 150mm forks are stocked on all models, but the frame can run a 160mm fork. The JEFFSY CORE bikes roll on 29” wheels, and YT makes no mention of MX compatibility for these models. YT JEFFSY, Stash frame storage compartment The latest JEFFSY carbon frames include STASH downtube storage, plus an accessory mount on the underside of the top tube. The compartment’s storage lid is double-sealed for water resistance and to keep things quiet. Aluminum models do not get in-frame storage, but they do include the top tube accessory mount for on-bike tools. YT JEFFSY, T-Type derailleur As for fitments the JEFFSY frame offers UDH derailleur hangers and runs Boost 148mm rear axles. Bottom brackets […]
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