Quote:
| Originally Posted by mjbayley Taken directly from Pirelli Web Site today 13th March 2009 for Ducati 600 SS
DIABLO
Front
120/60 ZR 17 M/C (55W) TL DIABLO Front - 2.2 BAR
DIABLO
Rear
160/60 ZR 17 M/C (69W) TL DIABLO - 2.5 BAR
Now as I have worked in automotive engineering for over 25 years.
I know that:
H rating on tyres is for max speed (sustained) of 125mph
ZR rating on tyres is for max speed of (sustained) of 181mph
I also know from calculation and where the rev limiter cut in that at Assen, Senetterton, and Donington, AntonyE was puling over 132 mph !
So I ask, why do DD go with H rating not ZR as stated and recommended on the Pirelli web site????
I know it's (prolly) the 'sustained' thing, but I think I know what I would rather be using (the old '1.5' times safety factor), and where does the club stand 'IF' there was ever litigation due to tyre failure ?????????????????
Mark |
Don't even go there Mark,
I asked a ligitimate question about "COMPULSORY" Dyno testing and the risk to the club of an engine failure on the Dyno'....and no-one took that seriously either....
....the ACU didn't take " medical support for practice days" seriously until Barry Sheene sued and entry fees sky rocketed for every rider as a result of the claim and the subsequent increase in race insurance.
I would be interested to know just how many DD'ers actually ride at those recommended "ROAD" pressures.