The Ultradynamico Mars JFF is the tire for riders who spend as much time exploring back roads and singletrack as they do dreaming up the next adventure. Fast rolling, surprisingly capable, and unmistakably Ultradynamico, the Mars blends speed and traction into a tire that's equally at home on spirited trail rides, bikepacking trips, and everyday rides where the route isn't always the point.
At the heart of the Mars is a continuous ramped center tread that keeps rolling resistance low while still providing dependable braking traction when things get steep. Large, well-supported side knobs inspire confidence when cornering on loose gravel, dry dirt, and hardpack, while the generous spacing between knobs clears mud before it has a chance to slow you down. Whether you're carving corners or climbing out of them, the Mars is designed to keep you moving forward.
The JFF (Just For Fun) casing strikes an ideal balance between ride quality, weight, and durability. It features tread rubber that extends slightly down the sidewalls for added protection against everyday trail hazards without compromising the supple ride that makes Ultradynamico tires so enjoyable. Riders tackling extremely rocky terrain or who frequently puncture tires may want one of Ultradynamico's heavier-duty casings, but for most riders the JFF delivers an outstanding combination of comfort and performance.
From weekend bikepacking trips and all-day gravel adventures to local singletrack and daily rides, the Mars JFF is a versatile tire that encourages you to take the interesting route—even if it leads somewhere unexpected.
Features
- Fast-rolling continuous ramped center tread
- Confident braking traction on loose and mixed surfaces
- Aggressive side knobs for predictable cornering grip
- Wide tread spacing helps shed mud and debris
- Supple JFF (Just For Fun) casing for an excellent ride feel
- Extended tread onto the sidewall for additional puncture protection
- Tubeless compatible
- FSC-certified recyclable cardboard packaging
- Sold individually
Specifications
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Available Sizes:
- 29 x 2.2" – 665g
- 27.5 x 2.2" – 625g
- 26 x 2.2" – 570g
- Tubeless Ready: Yes
- Casing: JFF (Just For Fun)
- Recommended Use: Trail, gravel, bikepacking, ATB riding, mixed-surface adventures
If you're looking for a tire that's quick on the pedals, predictable in the corners, and packed with personality, the Ultradynamico Mars JFF is ready for wherever your next ride takes you—even if that's somewhere a little off course.
If you don't see exactly what you need or have questions about any product, contact us and we'll do our best to answer your questions and help you find what you need.
