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Item # FIZ004M

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Item # FIZ004M

A little cushion goes a long way.

As a part of the cross-country minded Tundra family, the Fizik Tundra M5 VS K:ium Saddle was built with a focus on weight and efficiency, much like Fizik's renowned road saddles, with added attention to comfort apparent with its Versus distinction. The Tundra M5's race-ready silhouette is slim and tapered, just 125mm wide and 290mm long, aiming to accommodate riders with narrower sit bones who need room to move around in the saddle as they constantly anticipate terrain changes during a race.

Fizik enhances rider comfort by adopting a pressure-relief channel along the center of the saddle, and unlike many saddles with splits or cutouts, the channel does not affect the overall stiffness and rigidity of shell. The carbon-reinforced nylon WingFlex shell does flex, but it does so specifically along the wings of the saddle only; it flexes just enough to allow riders of different sizes to maintain freedom of movement throughout the pedal stroke without experiencing chafing or irritation, while the rest of the saddle body stays rigid.

Fizik surrounds the center channel with soft, low-density cushioning for a more forgiving, but not overwhelmingly plush, ride, and covers the entire saddle shell with a mix of Microtex, Anthracite, and Cordura nylon. Atop K:ium rails, the saddle won't absorb as much vibrations as its pricier carbon siblings, but it will still maintain excellent durability and resistance to wear from the elements without adding unnecessary grams to your ultralight XC frame.

Tech Specs

Microtex, [central cover] Anthracite, [rear cover] Cordura
Seat Length:
290 mm
Seat Width:
125 mm
Claimed Weight:
220 g
Recommended Use:
cross country, mountain bike
Manufacturer Warranty:
2 years

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Fantastic XC Saddle

  • Familiarity: I've put it through the wringer

Of all of the saddles I have ridden on the mountain bike, this is certainly up there with the best. The perch at the back is just wide enough to accommodate mid-wide sit bones, and yet perfectly narrow to allow maneuverability.

I have been doing some rather long rides aboard the Tundra, and have yet to have a bad day on it.

It is a relatively hard saddle with minimal padding, so it is not great for a beginner, but definitely worth a look if you have earned some durability with your posterior.