Never tried the new SuperTrail version, but with the SuperGravity casing it takes some time till its fully stretched.

The older RR was really nice summer trail tire, looking forward to hear your thoughts about the new RockRazor ST version.

 

Thanks for the info, I'm looking forward to your ride impressions.

 

First ride on the new Rock Razor was a bust, nothing to do with the tire as my dropper broke.
That said, it's a darn fast, well damped tire. I found it to offer notable if not huge advantages in these regards to my typical E-Agarro. Bit slow to turn in, I guess cause it has a flattish shape. On a large steep g-out I could feel the loss in braking traction but frankly I shouldn't have been braking there anyways. Leaning traction felt great but how much can I learn after 1.5 miles before the bike broke? Not much.
It currently measures 2.344 with 24psi in it so I'd consider the sizing very accurate.
I'll report back more when I get some real proper time on it.

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I swear I can hardly get a full ride in without something breaking (cassette this time) but I did get a solid 7 miles in on some trails I particularly like, a trail called Texas Pride being the crown jewel of this spot, so fun!
Anyways, I really like the Super Trail Rock Razor as a rear tire and if it holds up and doesn't tear knobs, it'll likely be my new favorite for dry hardpack with rocks sprinkled on top, which are my standard conditions.
Comparing to my old favorite, the E-Agarro, the new Rock Razor feels more damped, less pingy, faster by a decent bit, more locked in when leaned over (had no complaints with the side traction of the E-Agarro, the RR just feels more solid), gives up a bit of braking traction when it gets real steep (don't care) and also gives up a decent bit of absolute climbing traction when it's loose and steep (do care but think I can live with the trade off). The sidewalls feel much more rigid on the RR and I always run inserts front and rear. Point is I might be able to drop 1-3 psi to 22 - 24 psi and gain that climbing traction right back.
One thing I did notice was that the RR is a flat profile tire, and I briefly mounted a flat profile front tire (Martello 2.6) at the same time and this combo really negatively effected how eager the bike was to transition and initiate lean. Didn't like this but a front tire swap corrected this. Two flats don't make a right (or a left) but one in the rear works well.
The tire width seems maxed out at around 2.33" which is fine. This is a good volume for a rear 29" tire imo.
I'll update on long-term wear in a few more weeks.

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The Super Trail Rock Razor is a darn good tire and truly surprised me today.

I don't ride wet conditions intentionally and would never choose a Rock Razor to do so. It rained this morning, but I thought the trails had dried all up, they hadn't. The Austin Greenbelt can be a bit treacherous when it's wet, damp, or even just really humid after a light rain as the rocks get slippery.

My tires were packing up a decent bit at times, my riding buddy mounted 2 Shorty's in fact, and there I was doing everything on the Rock Razor just a bit more delicately than if it was bone dry. Like I would on any tire. And on the climbs, which was the only shortcoming I had experienced with the RR in the dry, in the damp the RR climbing traction was really good.

It kind of blew me away today. Good traction, great rolling, perfect size and weight and construction seems ideal as well. Think I have a new favorite rear tire.

 

I like semi slick rear tires, but stopped using them for two reasons which I view as insurmountable. 1). They don't just long because there's just no tread on the middle, and 2). The insides of the cornering knobs wear very quickly because the knobs are very exposed and always engaged.

Curious if the Rock Razor will overcome these two issues, but only time will tell.

 

I've been running an ethirteen S/S out back in their enduro casing (about 1015g) which is excellent except the sidewalls are porous. I'll probably try the Rock Razor super trail next.

 

I'm sold on this tire. I haven't been riding much (multiple bike part failures recently) but it looks totally fresh (I can usually notably hurt a rear tire in a handful of rides) , the traction is darn good (not great), and the low rolling resistance kicks butt.

Unless it starts to toss knobs, I'm sticking with this thing, at least through the hot Summer where pedaling is so darn tough anyways around here and it's bone dry.

 

How is it possible that you go through tires that fast in Austin?

 

Valid question. I do seem to be unusually hard on them even in our rocky terrain. In addition I do replace them when they fall off as I'm pretty picky. Lastly, sometimes they come off a bit soon just because I'm eager to try something else.

 

This is typical of what all my tires do in a handful of rides. Nothing wrong with it yet.
5 rides in, and 2 of those were abbreviated by parts failures.
Once again, not a reflection of the tire. They all do this ime.

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Work, weather & breakdowns have conspired to really limit my riding lately to about 1x/ week. However the new Rock Razor is my new favorite rear tire. It's holding up well, and the small trade off in rear braking traction is offset by the significant drop in rolling resistance, for me.

If I was riding in a wetter place, a place with loam, or going on a bike park trip. the Rock Razor would be passable but certainly not a top choice. I should have saved the Pinner I had on the shelf for that instead of selling it for a song.

 

Good feedback. What are you currently running for a front?

 

double

 

Now if only someone had these in stock.

 

Even thou you loosing a bit of braking traction on steep trails (compared to HD or MM), in dry conditions its really fast and fun rear tire with plenty grip in corners, even in bikeparks.
The only time i had problems with it was in wet and muddy conditions...

 

It's not a huge difference between the Agarro & the E version.
If I were to try to give you objective measurements I'd say the E has 10% less traction but also 15% less rolling resistance.

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It's not a huge difference between the Agarro & the E version.
If I were to try to give you objective measurements I'd say the E has 10% less traction but also 15% less rolling resistance.

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Oh ok, good to know. Was the ride better on the regular Agarro vs E-Agarro or just as pingy like you mentioned before?

 

The standard Agarro definitely rides better than the E version. More damped.

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Perfect, thanks for the info. I'll try the E-Agarro first and see what I think. As soon as you are allowed to say anything about the front you are testing please let me know, I'll definitely be interested to try them

 

Thank you for taking the time and posting this op.

Just out of curiosity, what dropper do you have and what broke?

 

My Wolf tooth remote broke actually. No issues with my KS droppers.

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Thanks guys! How does the HD2 compare to the agarro in terms of rolling resistance for anyone that has run it? Just trying to get a feel for how much faster tyres can actually run. I read a fair bit that the HD2 was quite a fast tyre, but curious to how it stacks up against well acknowledged fast tyres.

Interesting you say that the HD2 was close to the same as the RR!

 

I do really like the Rock Razor as an aggressive hardpack trail tire but it has some minor limitations as a trade off for the very low rolling resistance.

Just ordered the new Pirelli Scorpion Enduro R tire to test as a rear. It seems quite similar to the Rock Razor but with the added benefit of slightly taller center knobs. Hoping this bridges the gap. Plus trying different tires is fun.

 

How much slower does the scorpion roll compared to the RR?

 

I just ordered the tire yesterday and it'll probably be about six weeks before it's installed.

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While not on the RR, I’m a convert from Maxxis over to Schwalbe thanks to recommendations from two friends.

Both bikes are running SuperTrail Magic Mary 2.6 on the front. I came from running DHSs and Assagai’s on the front, and the Marys seem to be much faster and have better grip. The cornering feels sooo much nicer.

On the rear I’m running Nobby Nics 2.6s. I couldn’t find a good maxxis tire for the rear I like. Makes a great rear tire (blue stripe forgot what its called), and for the summer on the big bike, I’m going to roll Marys front and rear for park riding. I didn’t like the betty (too slow) or the HD, but these two tires feel like a good combo to me.

What I really like about the Schwalbe tires is the casing is solid front and rear, and it makes the bike feel better overall. I don’t feel the need to run lower pressures to make the bike not feel harsh. I had to do this constantly with maxxis, and now that’s not a problem anymore

 

Haven't been riding as much as usual lately due to some unfortunate parts breakage issues combined with a relentless work schedule, but I am loving this Rock Razor Super Trail and could be quite satisfied with this tire long term. I consider wear normal and good with no tearing issues that were common with the old model. The damping of the carcass is great and the low rolling resistance is noticeable and fantastic.
It's only real downfall (in my dry/ rocky/ mixed conditions) are that proper weighting of the rear tire on steep climbs can be critical as you'll lose drive traction if you resort to standing and leaning forward. Fortunately the Rock Razor allows you to approach climbs with more momentum and enthusiasm than other slower tires and this momentum can carry you over a ton. Another issue with the RR is that I wouldn't want to travel as much with it as it would be less than ideal in loam, wet, or whatever.
That said, I'm eager as heck to test this new Pirelli Scorpion Enduro R I have on the shelf as it looks similar to the Rock Razor but with just a bit more knobs right down the center. In fact I measured the height of the slightly worn RR center knobs at 3mm tall and the new Scorpion center knobs at 4mm tall with lots of ramping. So eager to test that. My only concern is losing the Addix traction on the side knobs that allows the Razor to turn very aggressively.
Once I kill this RR and get my rim back from a repair facility in a few weeks I'll slap the Scorpion on and maybe start a new thread about it.

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I don't understand why you're "throwing knobs" riding a green belt trail through Austin, or replacing tires every 6-8 weeks. That's pretty weird.

I've ridden a hundred hours of steep terrain through miles of limestone babyheads and sharp broken shoebox-size blocks and have yet to lose a single knob off my Continental Mountain King (on rear) and Maxxis (on front).

Are you a clydesdale taking high-speed, underinflated turns on summer asphalt?

Just to give context to the OP's riding area, Austin's Barton Creek Green Belt isn't a paved path. The trails are all rocky, with sharp edged limestone. The trails don't have much elevation change but are quite steep.

While I haven't ridden the RR, I'm very fond of the ethirteen semi slick. It's a rounder tire on wider rims (30.5 iw) than the RR or Minion SS, has a fairly strong casing in the LG1 format, and has held up well.

 

I'm not the first one to throw knobs on the previous versions of the Schwalbe tires. In fact it was a very common problem and exactly why the line-up was recently updated.
My current weight is about 183#s, I don't ride pavement and I run 23psi F & 26psi R with inserts in both ends, and ya, I'm Hell on my tire side knobs but the center of my tires don't wear much by the time I remove them.
Today I rode Emma Long, Thursday it was Brushy, Sunday it was Specs.
Sounds like I'm doing something a bit different than you do out there. Maybe my technique sucks or something, but I get down the trails pretty well on a good day.

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I'm not the first one to throw knobs on the previous versions of the Schwalbe tires. In fact it was a very common problem and exactly why the line-up was recently updated.
My current weight is about 183#s, I don't ride pavement and I run 23psi F & 26psi R with inserts in both ends, and ya, I'm Hell on my tire side knobs but the center of my tires don't wear much by the time I remove them.
Today I rode Emma Long, Thursday it was Brushy, Sunday it was Specs.
Sounds like I'm doing something a bit different than you do out there. Maybe my technique sucks or something, but I get down the trails pretty well on a good day.

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I tore knobs left and right on the original Hans Dampf and am not known for tearing up tires. I haven't had any issues with the newer versions.