First Impression Pirelli Diablo Rosso Tires

[Archimedes]

Per Pirelli's website he is running within the recommend pressure. They recommend anywhere between 36 to 42 in the rear. I personally run my at about 36-37.

Max recommended pressures are irrelevant for a single rider on a sprotbile. Those max pressures are for a max loaded bike and are also intended to ensure the longest tire life, not the most comfortable or safest ride for a one up rider.

40lbs in the rear on a sportbike is a high pressure, unless maybe all your riding is straight line commuting and you're primary goal is maximum tire life.

 

[gsxrguy11]

Max recommended pressures are irrelevant for a single rider on a sprotbile. Those max pressures are for a max loaded bike and are also intended to ensure the longest tire life, not the most comfortable or safest ride for a one up rider.

40lbs in the rear on a sportbike is a high pressure, unless maybe all your riding is straight line commuting and you're primary goal is maximum tire life.

I agree with you that it is a high pressure (40 psi) but if it works for him then cool.

 

[Go2Trackdays]

Soundz kinda hIgH to me, even for the street. What are you planning on setting them at for the track?

 

[Serge944]

Bike magazine gave the rossos top honors when compared to similar offerings from other brands. I was going to get corsa IIIs but decided that I probably wont be able to utilize that extra amount of grip and would rather have my tires last more than a few thousand miles.

I'm getting my rossos mounted this weekend and will post back with some additional feedback.

 

[Variable]

Agreed. I think it's legit to talk about tire pressure in this thread seeing as a ride review of tires is greatly affected by the pressure they're at.

+1

Folks are just trying to help dude out. Not everyone rides the same way or has the same priorites (more PSI, longer lasting life of tire vs. lower PSI, better grip/heat up time quicker on tire). Doesn't/shouldn't necessarily mean one is a squid if they run a lower tire pressure than the "factory recommended PSI". Just different priorities and styles of riding.
Personally I would never run anything near factory recommended max. tire pressure on the street or at the track, per the knowledge and suggestion of trackside tire installers.
What works for me may or may not work for others and vice-versa

 

[Z3n]

Funny, I run my tires at 38/40, and have no problems with sliding or tearing up the twisties on them. I'm also running sport touring tires. People seriously have a god damn phobia about getting more than 3000 miles out of their tires. You're not going fast enough to need 30PSI in your tires. I had to INCREASE the PSI on my Corsa 3s because they went numb under heavy abuse on the street. They needed 36+ PSI to take extended abuse down 33 when I'd get heavy on the throttle.

How about everyone flipping out about pressures goes out there and tries riding with higher pressure and seeing if the tires start sliding around on you? Bump them up a few PSI at a time and see how the bike handles. You may learn something and cut down on your tire bills a little. I ran 30PSI for ages, was totally wearing out my tires every 3000 miles, only to find that all i won out of that was a bill for more tires.

BTW, if you run low pressures, overheating can be just as bad as underheating the bike. Big squishy contact patch that moves around a lot and ends up cooking itself can mean that you end up with a tire that has a lot of tread but no stick left.

 

[DOMS]

Ah damns! tire pressure talk is just like, what is the best method of breaking in an engine. I personally run 34/38 on my M3 on the F4i. The reason I run at those pressures is because the extra pressure takes away the "shock damping" i would get at lower pressures, and therefore it provides more feedback of the road. But hey, that is just my perception.

Now, if the OP also ran similar pressures on his Michelins, then his review is somewhat of an apples to apples comparison. I try not to base my decisions on just one opinion, so i wouldnt trip over this review

 

[ST Guy]

Higher tire pressures equal colder tires and a smaller contact patch. If that's what you're after, why did you bother getting performance tires?

Ditto. Colder tires. Smaller contact patch. Less compliance where the rubber meets the road. This all adds up to less available traction. You may not need it 99.9% of the time. But what about that 0.1% where you need to make an emergency manuever or emergency stop? I'd lower the pressure just for safety's sake.

 

[warr77]

how about 36 on both tires???

 

[Cheyenne]

The reason I run at those pressures is because the extra pressure takes away the "shock damping" i would get at lower pressures, and therefore it provides more feedback of the road. But hey, that is just my perception.

Sorry gotta call BS on this. Kinda.

Higher pressures = Stiffer suspension = Higher frequency information from the contact patch = More info possible in the same time slice.

Not just your perception, but physical facts. (Anyone know if I'm right, or FOS?)

Whether you or I can make use of the info is another story, but I think this is an important principle that some don't realize.

I read a story once, I ferget where, about a race car tuner that detuned one of his cars so an amateur could drive it. He cut the suspension stiffness in half, to accomodate the guy, but it was still too stiff, and the guy complained that he couldn't tell what the car was doing. The tuner cut the suspension rates more, and the driver's lap times fell significantly, as he could take in the traction info much better. Faster, in a sloppier handling car.

On a bike, we're more enslaved by the tire tech than cars even, so a little extra traction goes a long way...enough to give up some feel, if you're good enough to live without it, and make use of the grip.

I think I need to raise my tire pressures, as I'm killing my tires all the time. I wear a big flat spot on the sides of the front, like I'm always using the same lean angle...I assume I'm doing it wrong.

 

[egrep]

I ran my Corsa III's at 32/32 and they felt great at first but wore quickly and went 'numb' on me. This pair i'm running 36/36 on the twisties and will run 32/32 at the track. We'll see how this works out.

Funny, I run my tires at 38/40, and have no problems with sliding or tearing up the twisties on them. I'm also running sport touring tires. People seriously have a god damn phobia about getting more than 3000 miles out of their tires. You're not going fast enough to need 30PSI in your tires. I had to INCREASE the PSI on my Corsa 3s because they went numb under heavy abuse on the street. They needed 36+ PSI to take extended abuse down 33 when I'd get heavy on the throttle.

How about everyone flipping out about pressures goes out there and tries riding with higher pressure and seeing if the tires start sliding around on you? Bump them up a few PSI at a time and see how the bike handles. You may learn something and cut down on your tire bills a little. I ran 30PSI for ages, was totally wearing out my tires every 3000 miles, only to find that all i won out of that was a bill for more tires.

BTW, if you run low pressures, overheating can be just as bad as underheating the bike. Big squishy contact patch that moves around a lot and ends up cooking itself can mean that you end up with a tire that has a lot of tread but no stick left.

 

[Archimedes]

Sorry gotta call BS on this. Kinda.

Higher pressures = Stiffer suspension = Higher frequency information from the contact patch = More info possible in the same time slice.

Not just your perception, but physical facts. (Anyone know if I'm right, or FOS?)

Whether you or I can make use of the info is another story, but I think this is an important principle that some don't realize.

So the logic is to effectively stiffen up the suspension and transfer more forces to the rider so the rider can feel the forces better?

Stiffer suspension past a certain point means less compliance which means less than optimal contact with the road surface.

By your logic we should just max out the preload and remove all damping so the bumps in the road are translated right to our bodies.

You know if you did more coke you could work harder to make more money to buy more coke which would allow you to work harder and make more money which would then allow you to buy more coke which...

 

[Cheyenne]

You know if you did more coke you could work harder to make more money to buy more coke which would allow you to work harder and make more money which would then allow you to buy more coke which...

OMFG!!!! Thanks! I'll make MILLIONS!!! I promise to buy you a desmosedici for giving me the heads up!

Also, you're taking what I'm saying too far, it's all a matter of degrees. Or in this case 6-8 PSI. As riders we are sensitive, but in a certain range. Within that, different skill and talent levels provide a sub-range where the newbie can't make use of the faster information rate a stiffer suspension gives. So he can't take advantage of the better chassis control it gives.

The flip side of this is that with enough chassis control, you may start losing grip on rough pavement. Splitting the suspension adjustments between high and low speed damping settings helps make a better compromise.

If things are stiffer than you're used to, you lose road feel. My thing about more info per time slice is technically true, but we probably don't use it in such a direct way. So that was kinda BSish on my part. We just need it to be at a level we're used to, or it sets us back a bit until we come up to speed. So in a controlled environment it's good for training sometimes. Ever drive go karts for a while (decent ones) and then run around in your car on the twisties?

So, a more skilled rider, can go just as fast, with more tire pressure, school us slower people AND save a few bucks in tires. Esp. if they keep it at sane speeds.

Motos have an advantage over cars in that the rider can accept greater compromises and make up for it with body positioning and such that don't work on cars. And suspension is a lot better than it used to be, I'm told.

 

[S4Alex]

So the logic is to effectively stiffen up the suspension and transfer more forces to the rider so the rider can feel the forces better?

Stiffer suspension past a certain point means less compliance which means less than optimal contact with the road surface.

By your logic we should just max out the preload and remove all damping so the bumps in the road are translated right to our bodies.

You know if you did more coke you could work harder to make more money to buy more coke which would allow you to work harder and make more money which would then allow you to buy more coke which...

But the question in this still remains...

Where can I buy more coke? duh... and how much pressure to use on the coke?

 

[corrupt]

I run 36 in my pilot powers. I've never felt the need to run lower. In fact I don't like the sloppy feeling.

I dunno, do track riders all typically run at the same pressures? I don't think there is one correct answer for everyone.

 

[Z3n]

I run 36 in my pilot powers. I've never felt the need to run lower. In fact I don't like the sloppy feeling.

I dunno, do track riders all typically run at the same pressures? I don't think there is one correct answer for everyone.

Depends on what speed they run. 25PSI worked great in my diablo supercorsas at one pace, by the end of the weekend I was up to 28PSI to stop them tearing. And everyone but the insane goes slow on the street, so slow that you would never see tearing like that. Slow enough that I'm looking to maximize wear, not maximize stick.

 

[stangmx13]

all this talk about tire pressures and i bet all your pressure guages are off by atleast 3psi in either direction, myself included. so how can we even compare pressures...

just to bring up another topic that nullifies this thread a bit, u think the OP measured tire circumfrences and adjusted the suspension height accordingly to account for different tire heights?? anyone know of the Rossos are shorter/taller than the 2CTs? a 3mm change in tire height could easily account for the change from "bumpy feedback" to "holding a line"

 

[carbonkid]

So is this a review on how much air to pop the rosso? lol. jk. 30-32 all day.

 

[escape]

We need a script that runs just before something is posted and removes sentences referencing oil types, tire pressures, etc. Result: more threads that are and less that are