Pirelli Diablo Rosso II tread life

[koko64]

60 profile? 55 will give many, many options. Surely you would get away with that. It's riskier, but some 190/50 tyres will give that profile on a 5.5" rim. Hmmm Ducati want to quicken tip in with the 180/60?

[NAKID]

60 profile? 55 will give many, many options. Surely you would get away with that. It's riskier, but some 190/50 tyres will give that profile on a 5.5" rim. Hmmm Ducati want to quicken tip in with the 180/60?

No clue, but that's the stock size on the 821. My S2R1000 was a 180/55 which gave plenty of options...


So, whats the end result if I step down 5% aspect ratio?

[Speeddog]

I've heard that the TC throws in the towel if a 180/55 is fitted.
My understanding is it's the same rolling radius as the 190/55 that's used on the big SF, and the Monster 1200.
So they could use the exact same TC system.


Ducati started the 180/60 nonsense with the 848SF.
Seems the small Pani has it as well.

The M821 has a 5.50 width rear rim with a 180/60, and the M1200 has a 5.60 rim and a 190/55.

I'd be tempted to fit a 190/55 and see how it works, as I expect there's all the usual variety of tires available in 190/55.

[koko64]

Forgot about the bloody TC. So a 190 might work?

[ducpainter]

I'd use the 190 as well. I know on the early SBK's with TC that were fitted with 'Stones the TC wouldn't work. You'd think Ducati would put a circumference parameter in the software both for the TC and the speedo.

I also question whether any other manufacturer's tire in a 180/60 would be the same as the Pirelli. Have you ever stood behind bikes with the same marked tire size and actually looked at them? None appear the same regardless of whether they're on the same width rim.

[NAKID]

I'd use the 190 as well. I know on the early SBK's with TC that were fitted with 'Stones the TC wouldn't work. You'd think Ducati would put a circumference parameter in the software both for the TC and the speedo.

I also question whether any other manufacturer's tire in a 180/60 would be the same as the Pirelli. Have you ever stood behind bikes with the same marked tire size and actually looked at them? None appear the same regardless of whether they're on the same width rim.

Yeah. Don't know why there isn't some type of standard that actually gets adhered to.

I'll take a look at 190s, but should I expect a decrease in the speed of tip in?

[ducpainter]

Yeah. Don't know why there isn't some type of standard that actually gets adhered to.

I'll take a look at 190s, but should I expect a decrease in the speed of tip in?

I doubt you'd notice much of a difference...depending on the actual width of the Pirelli compared to what you get.

If you were going from the old Dunlop 170 to a 190 then yes. Maybe if you were staying within the same brand and went to the next size.

Michelin has changed their rim width recommendations for track tires. So now a 5.5" rim can take a 190 and a 6" takes a 200. Whether the tires are different or they just don't want to make 180 track tires...who knows? 

[DarkMonster620]

as long as you don't have a 5% difference in overall circumferece or OD the BBS[Black Box System], the one that controls body functions as ABS/TC and such, will be able to compensate . . .

IIRC, a customer here tore his rear tire on a piece of metal, installed a 55 series, constant TC intervention and ABS was coming in even set at least intrusive setting . . .

[NAKID]

I doubt you'd notice much of a difference...depending on the actual width of the Pirelli compared to what you get.

If you were going from the old Dunlop 170 to a 190 then yes. Maybe if you were staying within the same brand and went to the next size.

Michelin has changed their rim width recommendations for track tires. So now a 5.5" rim can take a 190 and a 6" takes a 200. Whether the tires are different or they just don't want to make 180 track tires...who knows? 

I want to get away from the Pirelli and go to a PR3. So maybe I won't notice anything...

[ducpainter]

I want to get away from the Pirelli and go to a PR3. So maybe I won't notice anything...

Easy enough to take a circumference measurement on the old tire and the new.

as long as you don't have a 5% difference in overall circumferece or OD the BBS[Black Box System], the one that controls body functions as ABS/TC and such, will be able to compensate . . .

IIRC, a customer here tore his rear tire on a piece of metal, installed a 55 series, constant TC intervention and ABS was coming in even set at least intrusive setting . . .

Huge difference in the actual change between a 5% difference in diameter and circumference...no?

[DarkMonster620]

Easy enough to take a circumference measurement on the old tire and the new.
Huge difference in the actual change between a 5% difference in diameter and circumference...no?

>>> Service Manager in Italy told me that . . . I am just passing the 411

[ducpainter]

>>> Service Manager in Italy told me that . . . I am just passing the 411

I understand...just doesn't compute.

[koko64]

Watching for the outcome, as this will become an important issue for owners of newer bikes. I wonder how Japan Inc deals with this issue? It must only be a matter of software twaeking but I cynically lean towards a tyre deal with a sole mfr being the reason for such tight software parameters.

[ducpainter]

Watching for the outcome, as this will become an important issue for owners of newer bikes. I wonder how Japan Inc deals with this issue? It must only be a matter of software twaeking but I cynically lean towards a tyre deal with a sole mfr being the reason for such tight software parameters.

As much as I hate to say it...I agree about the conspiracy...'cuz money makes the world go 'round'.

[NAKID]

Watching for the outcome, as this will become an important issue for owners of newer bikes. I wonder how Japan Inc deals with this issue? It must only be a matter of software twaeking but I cynically lean towards a tyre deal with a sole mfr being the reason for such tight software parameters.

I'm sure that has a lot to do with it. Searching the interwebs, I can't find a sport tire in this size other than the Rosso II. The Angel GT is a touring tire, there are race tire options and a couple cruiser optons. But that's it...