Pirelli Diablo Super-Corsas holding up well!

catalpa · Sep 28, 2016

I've posted a few pics of my original SC tires. I have 3200 miles on them. They still look pretty darned good to me. I took pics with and without flash. Can't tell which shows the tread depth better. Both front and rear have a long way to go before hitting the wear bar. What do you think? When I replace these I was thinking of going with the Rosso-II, but maybe I'll go with the Rosso-Corsas. Revzilla has a good explanation of the differences. If I get 5K miles out of the SCs, maybe I'll just stick with them.

These are road miles only, so no opinion or experience on the track yet.

While I was taking pics I took one of my oil level. I've topped it up a bit. Maybe 250ml total.

And, yes, I have dropped the bike. I was parking and turning right into a parking space, as I've done thousands of times before, but on this bike I hit the steering limit. Went down at 2mph. I will have to replace the clutch cover. The bar end and the tip of the brake lever got scuffed. But you can see the damage, so I had to fess up.

Comments and opinions welcome!

double0 · Sep 28, 2016

I've got 4600 miles on my original set. I don't ride much since those miles took 3 1/2 years to accumulate but I'm not close to replacing mine either. Probably another 1500-2000 miles, which means like another year or so lol.

Blade Runner · Sep 28, 2016

My 1st front and rear lasted me about 5k. I could have gone further. But why. Tires are cheap hospital visit not so much. Now this second set will be gone with in 2.5k easy. Reason. 4 track days at Ducati Revs = 160 miles of track time and I have about 1.5 on them now and they look like I might get another 500 to 1k before time to replace. Am I happy with the wear? Hell yeah! For this kind of performance. I could not be happier.

ChrisE · Sep 28, 2016

I just find it mind boggling how you can get more than 2K miles out of these.

I'm a 60 year old fart and I've struggled to get more than 1800 miles out of any good sports tire in the last 10 years and I ..... it on acceleration to try and get to that 1800 miles.

Blade Runner · Sep 28, 2016

ChrisE said:
I just find it mind boggling how you can get more than 2K miles out of these.

I'm a 60 year old fart and I've struggled to get more than 1800 miles out of any good sports tire in the last 10 years and I ..... it on acceleration to try and get to that 1800 miles.

By chance would you be running an aggressive air pressure? Say like 34 to 36lbs? If so the tire would be prob getting pretty hot on just long straight roads thus wearing out the center fairly quickly.

flobrandx · Sep 28, 2016

Wouldn't it get hotter with less pressure? I would think low PSI would make them wear more quickly since you would have a greater contact area that would generate more heat as opposed to a higher PSI and smaller contact area. Just my thought...since you run less pressure at the track for more contact area and heat to improve grip...

timwu12 · Sep 28, 2016

flobrandx said:
Wouldn't it get hotter with less pressure? I would think low PSI would make them wear more quickly since you would have a greater contact area that would generate more heat as opposed to a higher PSI and smaller contact area. Just my thought...since you run less pressure at the track for more contact area and heat to improve grip...

in thermodynamics, the ideal gas law is written as PV=nRT.

In simple terms, when pressure goes up, the temperature on the other side of the equation must also go up.

Twistedracer · Sep 28, 2016

But running a higher cold pressure keeps the pressure from rising as much as starting from a low cold pressure.
A higher cold pressure normally equates to longer tire life, but it's a balancing act not to wear out the center to quickly.

For cold pressures I've always gotten great tire life on the street running 32-33/front and 34-36/rear cold pressures.

cmh210 · Sep 28, 2016

flobrandx said:
Wouldn't it get hotter with less pressure? I would think low PSI would make them wear more quickly since you would have a greater contact area that would generate more heat as opposed to a higher PSI and smaller contact area. Just my thought...since you run less pressure at the track for more contact area and heat to improve grip...

That is a common myth. Running a lower tire pressure for track day purposes will not result in hotter tires. The tire doesn't have to work as hard to maintain grip which results in lower temps.

catalpa · Sep 28, 2016

Twistedracer said:
For cold pressures I've always gotten great tire life on the street running 32-33/front and 34-36/rear cold pressures.

I'm running 40psi front and rear. The guys at the dealership recommended it.

I'm also 60yo. You can see the "chicken strips" on my tires. Atleast an inch wide on the rear.

The dealership said I could expect 2500 to 3000 miles. They said the rosso corsas would be the same. I was figuring I'd get 3000 or less. So, this is why I posted this question.

cmh210 · Sep 28, 2016

I've had bikes that I ran 42 psi front and rear. It made slow speed and high speed steering much quicker. I ran 34 psi in my 1199. When it was wrecked it had 2600 miles on it with the original tires. I would guess that they had at least another 1000 miles left on them.

Twistedracer · Sep 28, 2016

catalpa said:
I'm running 40psi front and rear. The guys at the dealership recommended it.

I'm also 60yo. You can see the "chicken strips" on my tires. Atleast an inch wide on the rear.

The dealership said I could expect 2500 to 3000 miles. They said the rosso corsas would be the same. I was figuring I'd get 3000 or less. So, this is why I posted this question.

Wow 40 in the front? I don't think I could ever get comfortable with that. I think riding style also has a big impact on tire life. Not only smooth on the throttle but also in steering inputs.

Gunny Fitz · Sep 29, 2016

Of course they look great Catalpa - they are PIRELLI'S my man !!!!!

Blade Runner · Sep 29, 2016

catalpa said:
I'm running 40psi front and rear. The guys at the dealership recommended it.

I'm also 60yo. You can see the "chicken strips" on my tires. Atleast an inch wide on the rear.

The dealership said I could expect 2500 to 3000 miles. They said the rosso corsas would be the same. I was figuring I'd get 3000 or less. So, this is why I posted this question.

Wow that is very high for those tire. May I suggest you visit the Pirelli we site for motorcycle tires. There you will find recommended tire pressures.

https://www.pirelli.com/tyres/en-ww.../sheet/diablo-supercorsa-sp#/technical-advice

The pressures you are running I can imagine the bike must fell super light on slow to medium turns. However you are causing super accelerated wear to the center of your tire on any stretch of Highway road you may be running on. If you are looking for confirmation. Go on your local highway ride a 70mph for a good bit and pull over on the shoulder. You will see your tire feathering away.

I myself run 30R 30F (Cold) on the street and for track day 27R and 30F (HOT) while on warmers set at 176 for 50 mins then back down to 145 for in between sessions.

Zelnik · Sep 29, 2016

Here is a shot of the next step up the ladder,Diablo Superbike Slick SC2. This time it was 4 x 20 mins,right side & economy wasted.

Blade Runner · Sep 29, 2016

Zelnik said:
Here is a shot of the next step up the ladder,Diablo Superbike Slick SC2. This time it was 4 x 20 mins,right side & economy wasted.
View attachment 19849

What size rear tire are you using?

Marmoot · Sep 29, 2016

Looks like cold tearing there?
Mine doesn't do that.
I normally run 26 rear 30 front after in warmers for at least 30 minutes.
Actually I always run that same pressure for pirelli supercorsa sp, sc, and superbike slicks, on the track

seems to generate the best wear for me (medium race group pace / fast trackday group pace).
For road I normally go 34/34 on the sp or sc (but not a fan of running sc on the road. You can almost hear the ka-ching ka-ching $$ noise every kilometres

)

Sent from my GT-I9500 using Tapatalk

flobrandx · Sep 29, 2016

timwu12 said:
in thermodynamics, the ideal gas law is written as PV=nRT.

In simple terms, when pressure goes up, the temperature on the other side of the equation must also go up.

cmh210 said:
That is a common myth. Running a lower tire pressure for track day purposes will not result in hotter tires. The tire doesn't have to work as hard to maintain grip which results in lower temps.

Interesting...never looked up the thermodynamic equation but good to learn and know something new. Thx!

I guess I just assumed a larger contact patch would generate more heat because there would be more friction and it sounds like your saying it creates less heat because the tire isn't working as hard to maintain grip?

Just out of my own curiosity I may have to do some track day tests on effects of pressure vs heat.

x3thelast · Sep 29, 2016

So...what's the sweet spot to get the more out of the center part? Firm? Or soft? Stick to the Manuals recommended pressure?

Sent from my iPhone using Tapatalk

cmh210 · Sep 29, 2016

flobrandx, have fun with that and let us know what you come up with!

Pirelli Diablo Super-Corsas holding up well!

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