At the beginning of 2019, Pirelli introduced a new track tire designated the “TD”, presumably an acronym for “Track Day”. The TD was developed with assistance of former AMA Superbike and AMA Formula Xtreme racer Jake Zemke.
The TD is exclusive to North America as a DOT legal, high performance track day tire. Think of the TD as a hybrid that sits between the Diablo Supercorsa race DOT and the Pirelli Rosso Corsa hypersport street tires.
- This tire does not require tire warmers
- D.O.T. street legal tread pattern
- Pirelli performance in a D.O.T. street legal tire.
- The ultimate evolution of our most successful Racing Super sport tire.
- New generation profile designed to maximize the width and length of the contact area.
- Optimized carcass to improve stability on braking and increase precision and speed negotiating bends.
- Wider slick area on the shoulders to improve traction and stability.
- Available in all common sizes
The TD looks exactly like a DOT Supercorsa race tire, but with a different compound (and softer carcass, I suspect).
The TD is DOT approved, making it appropriate for street use. However, keep in mind that the sparse numbers of water-channeling sipes (grooves) will likely make it a sketchy tire in wet conditions. On dry roads, I’m sure the tire will perform well.
Warm up time
One reason the TD can be used on the street is that it warms to its usable (if not optimal) operating temperature relatively quickly. Street riding puts little stress into a tire to bring a full race tire anywhere near its prime operating temperature, which is why using race tires on the street isn’t a great idea.
A street-oriented tire is designed to work at a cooler and wider range of temperatures, allowing you to jump on your bike in 30F degree temps, all the way to 120+F. A race tire wants to be within a narrow heat range that can only be achieved under heavy loads found at racetrack cornering and braking levels.
This is an area where I was able to confirm the quick warm up. The first day I rode on the TD was at Thompson Motor Speedway in Connecticut where the temps were in the mid 40sF. Freakin’ chilly, but perfect for testing.
I always take a couple laps to get some heat in the tires. I could actually feel the tires coming into their operating temperatures during the beginning of the second lap. Wow.
After the requisite two laps of progressively faster cornering and harder braking, I got to business. I was pleasantly surprised to be able to get my knee down on the third lap. Pushing on, I never had a slip, slide or pucker moment at the fast, but not blistering pace.
No Tire Warmers
The great thing about these tires is they don’t need tire warmers for the track. Frankly, I never use warmers at track days. A couple of careful laps does the trick just fine, although I understand why folks want the piece of mind that warmers give.
The TD promises to be more durable, providing improved longevity compared with the full race tire. I’ve had the TD on my 2011 GSXR750 for three full track days and the rear is just now showing enough wear to allow a guess at its lifespan.
Since the GSXR is a new bike to me and has about 25 more horsepower than my old Street Triple track bike, wear is a bit harder to judge. But, my rough calculations are that the TD will provide the same 5-6 track days for a rear and 7 or so for the front…but on a much more powerful bike! That’s damn good.
Keep in mind that this includes not only 4 expert level sessions, but also another 6 or so sessions per day at an intermediate pace while coaching. The intermediate pace is actually a bit rougher on rear tires since you tend to slow more so you accelerate more, which tears the tire.
Traction levels cannot be better. I rode as hard as I do on SC race tires and never once had a moment. The only thing that kept me from feeling as comfortable as on the race rubber is the lack of feel (see below).
One drawback I found is that compared with a true race tire, the TD doesn’t give the level of feel in the front. It’s not bad at all. And as a matter of reality, you’d only notice the slight numbness at expert lap times.
Also, I get a sort of “shudder” in the chassis over some surfaces that the race tire seems to ignore. Peter Kates from Computrack Boston thinks it may be becasue the carcass is a bit softer than the SC race tires. That makes sense as the softer carcass could transfer a frequency into the suspension. It makes sense that the TD has a softer carcass to help the tire warm up faster as it flexes more.
Most of the common sport bike sizes are available:
110/70 x 17
120/70 x 17
140/70 x 17
160/60 x 17
180/55 x 17
180/60 x 17
200/55 x 17
Great news here. The TD is significantly cheaper than the full-on SC0, 1 or 2 DOT race tire. You’ll save a cool $41.00 off a 120/70-17 front and $48.00 off a 180/60-17 rear. That’s $90 greenbacks that can go toward more track days. Sweet!
Buy your Pirelli Supercorsa TD tires from Motorcycle Gear and Tires (MTAG), one of this website’s strongest supporters.
The TD is a perfect choice for the track day rider who wants max performance on the track but still rides their motorcycle on the road from time to time and doesn’t want to spend the extra dough on race rubber that they won’t utilize at a typical track day pace. Sign me up.
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