Pirelli's history with cycling dates back to the Tour de France's golden era. Somewhere in the 1980s, however, the famous Italian manufacturer left cycling to focus upon motorsports. Pirelli recently returned to the sport, initially with their P-Zero road tires, followed by an e-bike offering, but did little to raise the needle for mountain biking until the announcement today, that their racing tire division has developed a range of high performance tires based upon technologies derived from their successful Scorpion motocross program.
Pirelli claims 70 world titles - reportedly, the greatest number among all tire makers - working with pro teams from KTM, Honda Yamaha, Suzuki, Husaberg and Cagiva. That's an admiral pedigree, but success on the motocross track does not always translate to a winning mountain bike tire. What we can say for sure, however, is that Pirelli's intimate knowledge of molding, and compounding rubber, in addition to the knowledge gained through successful campaigns in almost all forms of racing is a fantastic starting point from which to launch a competitive mountain bike range.
Meet Pirelli's Scorpion Mountain Bike Range Pirelli did a humongous amount of research before pushing the go button on their Scorpion tire development. Reportedly, they learned that mountain bike categories were all over the map, and that there was a large disparity between the marketing spew that tire makers used to define the purpose and performance of their tire designs and the levels of understanding that even the best riders assimilated on those same subjects. Pirelli decided that simplicity and clarity was essential to their program, so here's how it breaks down:
Four tires: The Scorpion range is comprised of four models, each designed for a specific task. All share the Scorpion name followed by a color-coded letter a red "H" for hard conditions, a yellow "M" for mixed conditions, a blue "S" for soft conditions, and a green "R" for rear-specific.
One Basic Compound: "SmartGRIP" is the name, which refers to Pirelli's discovery of a rubber compound that retains its wet weather grip, while delivering dry-condition tenacity and tear resistance. SmartGRIP is the overarching compound, which is then slightly modified to better suit the performance envelope and knob height of each of the four tire designs. Here's what Pirelli has to say about it:
"As was the case for the SmartNET Silica, which solved the tradeoff between rolling resistance and wet grip on the PZero Velo road tires, so is the SmartGRIP Compound, which in the Scorpion MTB closes the gap between tear resistance and wet grip. In the off-road application, the knobs of the tires profile are mechanically stressed in a much higher way than those of any road tire. The grip properties, therefore, must always be guaranteed, without compromising the rubber’s resistance to tearing.
With an incomparable expertise acquired in the formulation of compounds in over 110 years of competition at the highest levels, Pirelli has solved this critical point, thanks to the new SmartGRIP compound. At the same time, the engineers also customized the properties of the compound, from the static ones (hardness and breaking strength) to the dynamic ones (damping and dynamic stiffness) for each model and size." - Pirelli press release
Three widths: Scorpion tires were designed for wider rims from the beginning. Well, sort of. Pirelli suggests that the 2.2 inch width offerings are paired with 25-millimeter inner width rims, and states that its 2.4 and 2.6-inch casings are intended to be paired with rims beginning at 30 millimeters inner width. Pirelli supports 29 and 27.5 inch wheels (sorry, no 26), but does not offer all three casing widths in both wheel sizes. Reportedly, each size offering and model are engineered differently for specific performance goals. For instance, the Scorpion H is available in all three options for 29 inch wheels, but only in the 2.4 and 2.6 inch options for 27.5. presumably because the higher volume casings allow smaller wheels to roll faster over choppy terrain.
Pirelli will offer a conventional "Lite" casing (left) and a double reinforced casing with sidewall protection for all four models.
Reinforcement options: Different levels of protection are offered. Lite casings are not reinforced to minimize weight, extra layers are offered on the sidewalls, and a more heavily reinforced sidewal in addition to double ply casings are also an option. Smaller 2.2 inch casings are generally 120 tpi material, while the larger and more aggressive options are made with 60tpi material.
Single-compound tread: Rather than layer rubber with different durometers to obtain the right balance of durability and grip, Pirelli spent the time to dial in one compound that is optimized for each Scorpion model. The thinking was that the tire will perform consistently as the tread wears down. We've seen tearing and uneven wear between layers on many tires lately, so this may be a welcome innovation.
Interlaced tread: Certainly not new, but it works for motocross racing. Pirelli's designers tie in groups of tread blocks with raised stripes of tread rubber to tune the stiffness of the tire where needed and allow the blocks to flex independently where further reinforcement may hinder grip.
Interlaced tread: bands of rubber connect tread blocks to enhance grip.
"By basing the new tires’ design on the consistency of each terrain, Pirelli engineers also had to take into account many other variables: from the rider’s riding style to the most recent developments in terms of profiles and rim sizes. Therefore, in the new Scorpion MTB, the construction technology is not the same for all tire sizes: each size earned benefits from a dedicated development." - Pirelli press release
Scorpion Hard Terrain Sizes: 29" wheel - 2.2, 2.4 & 2.6" and 2.2 & 2.4" Lite; 27.5" wheel - 2.4, & 2.6"
Price: €49.90 to €52.90 ($69.99 to 79.99 USD)
Weight: 650g to 795g
Rim widths: 2.2" x 25mm, 2.4 thru 2.6 x 30mm (inner width)
Casing options: 120tpi Lite casing for 2.2 and 2.4" and 120tpi casing with120tpi sidewall layers for 2.4 and 2.6"
Scorpion Mixed Terrain Sizes: 29" wheel - 2.2, 2.4 & 2.6" and 2.2 & 2.4" Lite; 27.5" wheel - 2.4 & 2.6"
Price: €49.90 to €52.90 ($69.99 to 79.99 USD)
Weight: 695g to 850g
Rim widths: 2.2" x 25mm, 2.4 thru 2.6 x 30mm (inner width)
Casing options: 120tpi Lite casing for 2.2" and 2.4" Lite with 120tpi sidewall layer; and 60tpi casing with120tpi sidewall layers for 2.4 and 2.6"
Scorpion Soft Terrain Sizes: 29" wheel - 2.2, 2.4 & 2.6" and 2.2 & 2.4" Lite; 27.5" wheel - 2.4 & 2.6"
Price: €49.90 to €52.90 ($69.99 to 79.99 USD)
Weight: 695g to 855g
Rim widths: 2.2" x 25mm, 2.4 thru 2.6 x 30mm (inner width)
Casing options: 120tpi Lite casing for 2.2" and 2.4" Lite with 120tpi sidewall layer; and 60tpi casing with120tpi sidewall layers for 2.4 and 2.6"
Scorpion Rear-Specific Sizes: 29" wheel - 2.2, 2.4 & 2.6" - 27.5" wheel - 2.4 & 2.6"
Price: €49.90 to €52.90 ($69.99 to 79.99 USD)
Weight: 740g to 855g
Rim widths: 2.2" x 25mm, 2.4 thru 2.6 x 30mm (inner width)
Casing options: 120tpi casing with 120tpi sidewall layer for 2.2" and 60tpi casing with120tpi sidewall layers for 2.4 and 2.6"
Our Thoughts We'll have to ride Pirelli's new Scorpion tires to discover first hand if their claims match the performance of what appears to be a well designed tire range. The tread patterns look familiar enough, and that's a good thing. Tire design has been converging for some time. Specialized and Bontrager have enjoyed much success with tread patterns similar to the Scorpion H and M, while Schwalbe and Maxxis have been winning consistently using patterns similar to the R and S models.
I am not accusing Pirelli of knocking off someone else's tire designs. After 110 years of racing development, however, they've no-doubt learned that winning designs are built upon the foundations of previous success. The devil is in the details - especially with rubber compounds and vulcanizing presses. Pirelli, with over 1000 engineers and chemists working on their competition tires, have got those bases covered. I hope the Scorpion range delivers, but more interesting to me is the possibility that a new player in the mountain bike tire game may break the industry's monotony monopoly and start innovating solutions to sidewall tears and other nagging issues that our sport's leading tire brands have chosen to ignore for generations past. We shall see. Scorpion tires will start shipping this month.
Find out more about Pirelli Scorpion tires here.
Might run into branding issues though.
Presumably people don't think it's called Hope due to some twee attempt at a random representative name.
It's a bit different to randomly picking Scorpion to describe your tyres.
Hypersoft - Pink
Ultrasoft - Purple
Supersoft - Red
Soft - Yellow
Medium - White
Hard - Ice Blue
Superhard - Orange
Intermediate - Green
Wet - Blue
Honestly I'd embrace some kind of a compound chart. Better than 27.5x2.5 3C/EXO/DUAL/SINGLE/TR/DD/MAXX GRIP/MAXX TERRA/SuperTacky/WT. Try explaining that one to your mom.
The tread looks a lot like Schwalbe to me. Nice job there Pirelli!
My LBS has tires starting @ $95 IIRC.
I'm convinced there is price fixing happening in the cycling world ATM. The EU should look into it. They seem to be the only ones who keep an eye on that sort of thing for consumers.
If you want $175 tires on your truck and you're using it for more than fetching the groceries or driving to work in the city from your suburban dwelling, you're probably going to have a bad time.
And you're wrong about the spelling of tyres. When people learn another language they learn English, not bastardised 'American' English which basically operates on the premise that let's make it simpler because Americans aren't smart enough to understand that U can belong in words where you don't hear it.
Eh neighbour?
*if you use them where you don't need much cornering grip. Like a DJ bike or race BMX.
A 3C EXO maxxis is more comparable to a high end sports car tyre from a premium manufacturer. Suddenly the maxxis looks pretty cheap in comparison.
Quite far from innovative. Continental has been doing that for 10 years and the older maxxis tires were also single compound.
It admittedly does have less grip, though.
-A Tribe Called Quest