Review: Schwalbe Magic Mary and Rock Razor Tires

26er 27.5 29er Tires

Schwalbe introduced two new gravity oriented tires at Interbike 2013, the aggressive Magic Mary and semi-slick Rock Razor. The Magic Mary with its big beefy knobs is a descendent of the Muddy Mary, but shares some design characteristics right between the Muddy Mary and Dirty Dan, helping it thrive in loose conditions. The Rock Razor has a semi-slick section or low height center knobs along the middle of the tire for low rolling resistance, along with large side knobs for cornering.

Magic Mary

The new Magic Mary is the successor to the Muddy Mary, and the big chunky knobs and open tread design provide excellent control and traction in a wide variety of conditions. The tubeless ready 2.35″ width tire comes in 26″, 27.5″ and 29″ sizes, in their VertStar and TrailStar compounds, and Super Gravity and SnakeSkin sidewall protection systems. The Super Gravity versions weigh around 1050 grams each and retail for $94, while the SnakeSkin comes in at 800 grams and costs $82.

  • 26 x 2.35 – Super Gravity VertStar, Super Gravity TrailStar, SnakeSkin TrailStar
  • 27.5 x 2.35 – Super Gravity VertStar, Super Gravity TrailStar, SnakeSkin TrailStar
  • 29 x 2.35 – Super Gravity TrailStar, SnakeSkin TrailStar

The tire is meant for loose or wet conditions, where traction, cornering and braking in less than optimal conditions is paramount. The knobs are monstrous, blocky and aggressive, and they have lots have siping for an additional bite into the terrain. The open tread design has a two-three center line-up design (the three are ramped), along with big beefy angled shoulder knobs. All the large siped knobs, tread pattern and design provided increased grip in corners, better braking and tractor pulling traction in soft, loose and muddy conditions. Of course, the large knobs and heavy weight come with poorer acceleration and rolling resistance, which is to be expected with a tire that isn’t meant for cross-country racing or use on hardpack.

Measured specs:

  • Weight – 1058 grams (27.5″ Super Gravity TrailStar)
  • Width – 2.28″ carcass and 2.31″ knobs

Rock Razor

The new Rock Razor is a semi-slick tire meant for the Gravity and Enduro world, with low center knobs for fast-rolling and acceleration, and is optimized for the rear wheel. The tubeless ready 2.35″ width tire comes in 26″ and 27.5″ sizes (no 29″ as yet), in their TrailStar compound and Super Gravity protection system, or their PaceStar compound and SnakeSkin sidewalls. The Super Gravity weighs around 950 grams each and retail for $93, while the SnakeSkin comes in at 680 grams and costs $89.

  • 26 x 2.35 – Super Gravity TrailStar, SnakeSkin PaceStar
  • 27.5 x 2.35 – Super Gravity TrailStar, SnakeSkin PaceStar

The tire tread has a very low height along the center in a four-three line-up design, and has large, tall and beefy shoulder knobs just like the Magic Mary. The center tread pattern makes for a quick roller, and once rolled over for cornering; the monstrous side knobs take over for traction and control purposes. The low tread height mimics what many mechanics alter on racer’s tires at many Enduro events; they cut down the knobs to gain extra speed from the tire.

Measured specs:

  • Weight 940 grams (27.5″ Super Gravity TrailStar)
  • Wdth – 2.25″ carcass and 2.3″ knobs

Continue reading for more on the Schwalbe Magic Mary and Rock Razor and full photo gallery.

About the author: Brian Mullin

Brian likes to push the limits in all the sports he obsesses in, whether it's mountain biking, whitewater kayaking, skiing, or sport climbing. He takes those same strengths and a good dose of insanity to his reviewing and writing on mountain biking products, creating technical, in-depth articles. Whenever he's not on the bike, he might be found watching MotoGP racing, otherwise look for him out on the trail.

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  • Mr. P says:

    Any comments on what the wear is like on the Rock Razor. The Hans Dampf Trailstar is notorious for wearing and tearing down very quickly on the rear.


  • gg says:

    Crazy expensiv ! Not on my radar at that price point.

  • Nicholas says:

    It’s important to note where the tires were tested… I have a feeling loose conditions in sunny California is not the same as a mid-winter’s ride in the grand ole Pacific Northwest.

    • Brian Mullin says:

      Sorry, I’ll add that info. The local Colorado testing terrain is predominantly loose rocky conditions, with many long steep climbs and descents, rock gardens, slick rock, an occasional smooth singletrack and lots of ugly, loose gravel. If you have ever ridden in Colorado Springs area, you’d meet the most humbling trail conditions, the Pikes Peak gravel. Imagine long swaths of trails covered with pea gravel (sort of like the side of a fire road). Lately we have had a lot of snow with melt conditions between storms, so wet and mud interspersed with snow. So not sunny California, though I have ridden them in dry conditions and some hardpack.

  • mr.habanero says:

    I love both tires but i fear the MM might not work well for my area. The rr looks freakn badass!

  • Cmarsh says:

    So based on your picture it looks like the 3.35 RockRazr fits in the rear of a 27.5 converted Mojo HD? How is the clearance?

    • Brian Mullin says:

      I am riding the HDR currently and they fit just fine. I wore away quite a bit of the rear yoke on my HD, so I can no longer accurately comment if they would fit. Let me check clearance on an older triangle I have laying around. I would think it would be pretty tight, since the Rock Razor’s are fairly tall (27 13/16″ tall on a Pacenti DL31 rim).

  • DoeBoy says:

    I got the 275 Rock Razor on the rear of my Intense and I’m not sure if I’m really liking how much it slips on a steep descent or a fast corner. I’ve got maybe 5 rides in with it, so I may like it once I adjust to how it handles. As for right now, I wish I’d have gotten the Hans Damph for the rear.

    I got the Hans Damph on the front and I love it.

  • Glenn b says:

    First time visit thumbs up

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