by Hepzi Jasmine October 07, 2026 1 min read
The Firefox Tremor X 29 D/Disc 21-Speed is a versatile mountain bicycle designed for everyday rides and recreational adventures. Its hardtail steel frame provides a strong foundation for commuting, fitness and light trail riding. The 29-inch wheels offer smooth rolling and improved stability across varied terrain. A 60mm suspension fork helps absorb bumps and reduces vibrations on uneven surfaces. Shimano 21-speed gearing provides flexibility when tackling climbs, flats and changing riding conditions.
“The Tremor X combines rugged construction with versatile all-terrain performance.”
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Built with a high-tensile steel frame, the Tremor X ensures durability and resilience, essential for both city rides and trail excursions. The frame's geometry promotes an upright riding position, reducing strain and enhancing comfort during extended rides. Available in a 48 cm frame size, it is ideal for riders with heights ranging from 5'8" to 5'11", ensuring a proper fit for optimal control and comfort.
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Durable high-tensile steel frame designed for longevity and comfort.
The bike features a 21-speed gear system, providing riders with the flexibility to tackle various terrains with ease. Equipped with Shimano Tourney TY5 front derailleur and Shimano Tourney TY3B rear derailleur, the Tremor X ensures smooth and reliable gear shifts. This range of gears allows for efficient climbing, acceleration, and maintaining speed on flats, catering to both beginners and seasoned cyclists.
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Versatile 21-speed Shimano drivetrain for adaptable performance across diverse terrains.
Fitted with an MJ Suspension Fork offering 8mm of travel, the Tremor X effectively absorbs shocks from uneven surfaces, providing a smoother and more controlled ride. This suspension setup enhances rider comfort, particularly on rough trails or bumpy city streets, reducing fatigue and improving overall handling.
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8mm travel suspension fork for improved shock absorption and ride comfort.
The bike is equipped with mechanical disc brakes, delivering consistent and reliable stopping power in various weather conditions. This braking system enhances safety and rider confidence, especially during sudden stops or technical descents. The steel handlebar (66 cm width with a 3 cm rise) and 28.6 mm 4-pin stem contribute to stable and responsive handling, allowing precise control during maneuvers.
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Dependable mechanical disc brakes for consistent braking performance.
Rolling on 29-inch wheels, the Tremor X offers enhanced stability and the ability to maintain speed over various terrains. Paired with durable 74x7 cm tires, this wheel setup ensures excellent traction and a smooth ride, whether navigating city streets or exploring off-road paths.
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29-inch wheels with robust tires for improved stability and traction.
The Firefox Tremor X 29 D/Disc 21-Speed is a well-equipped MTB for riders seeking versatility across city roads and recreational trails. Its steel frame provides durability while the Shimano 21-speed drivetrain offers flexible gearing. The 60mm suspension fork and wide 29x2.40 tyres improve comfort and stability over uneven surfaces. JAK-7 mechanical disc brakes provide dependable stopping control with 160mm rotors. At 18.7kg, it is relatively heavy, but its robust equipment makes it a capable all-terrain option.