Schwalbe's Rock Razor is an important tire. No doubt half of you will stop reading as soon as we mention that it was developed from enduro racing, but bear with me. One of the best things about the discipline, is that companies are pushed on to develop products that are really very good out in the real world, and not just up in the rareified air of World Cup racing. Here in Europe, top enduro racers have been running semi-slick rear tires, like the Maxxis Larsen for a number of years. The logic is that if you have long transfers to tackle on the saddle, a fast-rolling rear tire helps you save precious energy for when the clock starts. Yet, there was always a big sacrifice, because for technical terrain, you had no tread to help you when things got ugly. That lead some clever folk at Schwalbe rethink the semi-slick tire saying, "Why can't we at least have tread on the side?" The result is the Rock Razor.
Rock Razor semi-slick is one of the most innovative tires of recent years
Details:• Purpose: All-mountain/trail/enduro/downhill (dependent on carcass)
• Sizes available: 26 and 27.5, 29-inch from summer 2014
• Carcass: 2.35-inch, Evolution-Snakeskin and Super Gravity
• Compounds available: Pacestar, Trailstar (intermediate)
• Tubeless ready: Evolution Snakeskin and Super Gravity carcasses
• Weight: 665g or 925g (26" / dependent on carcass)
• MSRP: $93.25 (Super Gravity - tested)
ConstructionWe looked in depth at the construction of Schwalbe's new aggressive tires when
we reviewed the Magic Mary, so we won't go into depth about that here. The Rock Razor comes in roughly the same sizes and options as the Magic Mary. It is the tread pattern, though, that matters with the Rock Razor, that is where the big innovation is. It as a semi-slick design with DH side knobs. And they are big side knobs - a shade smaller than Magic Mary, but still so substantial that they would look more than at home on most full-blown DH race tires. The side blocks are lined up consistently - all the same size and the same space apart - which is vital for cornering when you dig the side of the tire into the ground. On the top, the small block pattern is square, also with consistent spacing, and while there may not be much tread, what is there behaves utterly predictably. Schwalbe adds a little moto influence to the crown tread, with every other row slightly raised to increase braking bite.
It is the combination of fast-rolling center blocks and a burly, aggressive edge pattern that makes the Rock Razor so good. Schwalbe offer it in three different casings to suit any style of riding.
SetupWe tested Schwalbe's 1,000g, Supergravity casing, with the Trailstar rubber compound, in both the 26 and 27.5-inch wheel sizes. Mounting the tires tubeless depended very much on the rim. With the DT Swiss EXC 1550 wheels, the Rock Razors needed a compressor to seat the beads. With the newer DT Swiss Spline ONE EX 1501 and Stans Flow EX wheels, they were a joy to work with, more or less seating with a floor pump.
Out on the TrailClimbing: Switching from a full knobby tire, like Schwalbe's Magic Mary to a semi-slick tread pattern is nothing short of a revelation for long road and fireroad drags. Even though the Super Gravity version of the Rock Razor weighs the same as a Magic Mary, it transforms how the bike climbs, as the rolling resistance is dramatically lower. What was less-expected was how well it did when we got onto real dirt, offering a surprising amount of traction. We kept running the Rock Razor all the way through the winter and it really impressed us. The ride that sticks out most was trying to get up an ice-covered fireroad. There were two us; one on the Rock Razor, the other on another semi-slick rear tire with a more diagonal tread. While the other semi-slick fishtailed and floundered, the Rock Razor quietly got the job done with a minimum of fuss. Of course a full knobby tire would offer more traction, but usually, we ended up feeling that our talent was letting us down before the Rock Razor did.
Cornering: This is what makes the Rock Razor so much better than any other semi-slick. The side tread is nothing short of awesome and, much like with the Magic Mary, you can lean the tire in and hold the bike firmly on the side tread. When you transition from centre to side tread, the difference in the tread profile means you can feel exactly when you get onto the side, which is a great help to manage traction. However, the Rock Razor may not suit less confident riders. To corner well with this tire, you need to lay the bike onto its side. Try to keep the bike upright and you will feel yourself sliding.
We ran the Rock Razor in all conditions and were continually impressed by how well it performed.
Braking: After riding the Rock Razor in the rear for a few months, we got complacent and dropped into one of the ultra-steep DH lines near our test area in Sospel. Once you get used to the tire's excellent grip when leaning the bike into corners, you can easily forget that it is still a semi slick. On the kind of steep terrain, where you need to use your rear wheel to control your speed, we found ourselves sliding out of control into the catch berms. It is a tire with limits and when you drop into that kind of terrain, you are asking for trouble. You need to think about braking with this tire and get it done ahead of time. We really like the combination of this tire on the rear, paired with a Magic Mary front (although we have heard reports than Brendan Fairclough runs them both front and rear on his trail bike in the off-season, but he clearly brakes a lot less than we do). We have spoken to riders struggling with this tyre when paired with a less-aggressive Nobby Nic front tyre and we do believe that you need a bigger front tire for it to work. All the traction for braking is coming from the front, so you'll need something more muscular than a semi-slick to stand up to the task. Again, these kind of constraints won't suit everyone.
Lifespan: We have been pleasantly surprised how long the Rock Razor has lasted. It seems to have a harder compound than some of Schwalbe's other offerings. Our current rear tire has been on the bike for nearly three months now and we are only just starting to think it may need to be retired. There isn't a huge drop-off in performance once this tire starts to age either. It may lose the sharpness of a fresh tire, but it still feels good out on the trail.
Pinkbike's Take: | Schwalbe's Rock Razor is not a tire for everyone. You'll need to be honest with yourself when you are considering the Rock Razor. If you are not confident leaning a bike into corners and braking precisely, then it is probably worth looking at a more forgiving option. As Nukeproof's Greg Callaghan says, "These tires will make a man of you." That said, we love it. Paired with an aggressive front tire the Rock Razor is a perfect combination for aggressive trail riders and enduro racers, and we have ran it all conditions with few misgivings. Schwalbe have produced a welcome evolution to semi-slick tyres. We expect the Rock Razor to be the most-copied tire of the 2014-2015 seasons. - Matt Wragg |
www.schwalbetires.com
Intense and Maxxis have both done similar designs but always with thicker full DH casing (you could even get the intense in 4ply which was so stiff you could run 10psi!)
Instead of acting like this is new shizzle, how about a comparison amongst the big players with this type of tire?
Seems like a deal to me if I don't chew up a tire every week.
www.cycle-tyres-direct.fr/pneu-schwalbe-rock-razor-trailstar-supergravity-tubeless-ready-2102.html
37€ thats not bad
Ahh ok, but you cant get the Rock Razor in the performance series.
Rdot84: and the same goes for the Magic Mary so you are not running a MM performance in front, so maybe thats why have good grip.
www.schwalbe.com/en/offroad.html
What do you mean no 29er available?
And what kind of trucks/cars do you folks have that your tires only cost $100? Cheapest tire I can find for my truck is $200 and my car is $190 with my actual tires costing $300 and $260 each not including installation or shipping.
Already sheeplem stop bitching about prices. We all know there are cheaper options than Schwalbe. I won't run anything else anymore. The price is worth it for me.
If EVERY tire cost $100+ then people could complain that there were no other options, however at this juncture this is not the case. If you want a $50 tire buy a $50 tire. If you want a $100 tire but can't afford that tire then that is not the manufacturer's fault, just means you have to save up a bit longer.
I'm finally old enough and in the position that cost for bike parts is no longer an issue, some would argue that I'm not "good" enough to justify the parts, but I just like buying them because I can.
hm, had it on my trance sx and was overal not very impressed.
* climbing on lose gravel is not very good - roll resistence on flatter parts was next to nothing
* descending/cornering is good as long as everything is bone dry
(nearly managed to produce my first highsider with a mtb on wet gras ;-) )
in my personal opinion it is not a good tire for alpine (Tirol/Austria) terrain - there are areas where this tire is usefull but in my opinion there are other (cheaper) ones that are better for every day riding
The super gravity version seems to hold up well, seen quite a few snake skin versions with tears in the casing? No idea if it's bad luck or other wise.
Bike discount.de has them for around $50.
Recently I got new tires for my wife's car.
Good for 55,000 miles (probably 3-4 years), mounted, balanced, installed with TPMS, and discarding old tires all for just under $360. That's $90 per tire.
What is wrong with this picture, I don't get it. $93 and I have to install myself and it might last a few months here in Colorado..
Top performance anything costs a premium.
It's a shame Schwalbe dont make a 29er version, will have to test the specialized slaugther or michelin wildracer2 equivalents.
I suspect too that for my riding style that the profile makes as much if not more difference to the grip I get than the knob spacing mentalhead. Try some different profiles (more rounded or more square edged)..
Sonator - I love Butcher Control/ Purgatory Control combo for trail riding, NNic RoRon for brainless XC and Minions DHF for anything gravity fed. Lately I am looking for something with more stable carcass that doesn't weigh a ton. But I guess I may want too much. I screwed up Purgatory on a ugly side ways landing off a max 1,5m drop. I may go for it again though as it was more of my fault.
So these tires may be the all rounder answer
Mountain Bike Action. magazine started using the Specialized. captain 2.2 as a rear tire on downhill bikes about 2 years ago .
It comes in three different compounds and its almost half of price of the Rock razor
ill buy 2 for the price of one of these..
cappuccinotyres.com/used-tyres-bradford
Thinking about it, I'd like to try one again, used to run these for dual slalom ages ago..
Although a BlingBling Lopes looks good.
Anyone know if there are any plans for maxxis to release it?
Looks fast!
dh £
enduro ££
29 er £££
whats next
29 enduro ££££££££££££££££££££££