Pirello to Bridgestone (review)

zoran zv30 at sbcglobal.net
Tue Aug 19 22:14:50 PDT 2008


you asking me if there is other tires than michelin :)
I know few guys that tried bridgestones and will not use them again.


Zoran Vujasinovic
Twin Works Factory
775-786-4881
www.twfracing.com 
----- Original Message ----- 
From: "Jo Rhett" <jorhett at fastlizardracing.com>
To: "Suzuki SV650 Mailing List" <sv650 at micapeak.com>
Sent: Tuesday, August 19, 2008 10:07 PM
Subject: Re: Pirello to Bridgestone (review)


>I have some ride height adjustment in the shock as well.  When I tried  
> that on the Pirellis I just lost traction, though.   We'll see.
> 
> Any considerations, Zoran?  You're more used to the harder tires...
> 
> On Aug 19, 2008, at 9:37 PM, Randy Grein wrote:
>> Check the swingarm angle - you might be able to increase rear height  
>> instead.
>> Randy Grein, WMRRA #41
>>
>> On Aug 19, 2008, at 9:31 AM, Jo Rhett wrote:
>>
>>> I'm not certain I can.  With the GSXR front it's pretty low, and a  
>>> couple millimeters will probably have me dragging the belly pan.   
>>> I'll give it a try though.
>>>
>>> On Aug 19, 2008, at 12:07 AM, Randy Grein wrote:
>>>> Thanks for the review Jo. You might try dropping the front a  
>>>> couple of millimeters to get the front to track properly again -  
>>>> just an idea, I've not heard the Dunlops were prone to understeer  
>>>> but I've not considered them for about 4 years - since a friend  
>>>> wore out a front in 1 race.
>>>> Randy Grein, WMRRA #41
>>>>
>>>> On Aug 18, 2008, at 11:32 PM, Jo Rhett wrote:
>>>>
>>>>> So Friday at Infineon was just me having fun, as I wasn't going  
>>>>> to race that weekend.  All morning I was having trouble lighting  
>>>>> up the rear, nice fun slides out of every fast corner - 2, 3, 3a,  
>>>>> 4, bottom of the Carousel, you name it.  Not surprising given  
>>>>> that I had 3 race days, 4 practice days and 3 track days on the  
>>>>> set of tires.
>>>>>
>>>>> At lunch I replaced the soft/soft Pirellis with soft/medium  
>>>>> Bridgestones just to have some fun.  I've got 5 trackdays before  
>>>>> the final WERA race, so why not fart around and see how I like  
>>>>> the tires?
>>>>>
>>>>> I actually dropped out of the A Race group figuring that  
>>>>> switching tire brands would slow me up for the rest of the day.   
>>>>> I went out behind a moderately fast guy to pace myself and not  
>>>>> get stupid, but felt so good I passed him entering the Carousel  
>>>>> and never saw him again.  My 4th lap on the new tires was 2/10ths  
>>>>> of a second faster than I did on the Pirellis all morning (as  
>>>>> well as all succeeding laps).
>>>>>
>>>>> First impressions:
>>>>>
>>>>> * the profile is different, and my first thought was that the  
>>>>> tires actually "rolled better".   Especially on corner exit, the  
>>>>> bike seemed to be moving faster right away.
>>>>>
>>>>> * On corner entry the tires held awesome and solid.  I really had  
>>>>> to work to get the front to push, and I never successfully spun  
>>>>> up the rear.
>>>>>
>>>>> * Just like the Pirellis, once I had turned in the bike was  
>>>>> stable and solid, completely reassuring.
>>>>>
>>>>> However, it wasn't all good. My perfect suspension from the  
>>>>> morning was gone.
>>>>>
>>>>> * The bike seesawed mid-corner (fixed by adding rebound to the  
>>>>> front and taking some out of the rear)
>>>>>
>>>>> * The front under shuddered under hard braking, fixed by adding  
>>>>> rebound to the front but it came back as soon as I went faster  
>>>>> again.
>>>>>
>>>>> * The tires exhibit the Dunlop "drift".   Unless you push the  
>>>>> front, a Pirelli will exit the corner *exactly* where you think  
>>>>> it should.  The Bridgestones exhibit the Dunlop Drift where you  
>>>>> find yourself just a foot wider than you expected exiting the  
>>>>> corner, but you didn't push the front.  The whole bike just ...  
>>>>> drifts a bit.  I hated this on the Dunlops (which is why I went  
>>>>> to Pirelli in the first place) but this appears to be evident in  
>>>>> the Bridgestones too.  *shrug* For now I'm just riding it.
>>>>>
>>>>> Next stop: Miller Motorsports Park, Utah.  I'm returning after a  
>>>>> fairly successful weekend on Pirellis there, we'll see how the  
>>>>> Batlax holds up.
>>>>>
>>>>> -- 
>>>>> Jo Rhett /  velociRaptor Racing
>>>>> #553 WERA / AFM
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>> -- 
>>> Jo Rhett /  velociRaptor Racing
>>> #553 WERA / AFM
>>>
>>>
>>>
>>>
>>>
>>
> 
> -- 
> Jo Rhett /  velociRaptor Racing
> #553 WERA / AFM
> 
> 
> 
> 
>


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