Motorcycle Racing Forum

Racing Discussion => Racing Discussion => Topic started by: RSimmons on January 16, 2008, 08:27:16 AM

Title: Tire folding/creasing?
Post by: RSimmons on January 16, 2008, 08:27:16 AM
I just noticed this: take a look at the rear tire. Is that a crease or a fold at the bottom, just above the pavement? Are sliPirellis supposed to do that? I was having rear tire traction issues over the weekend. I was running 30/28 hot, which I was told is the right pressure for the Diablo Supercorsa

(https://www.ccsforum.com/proxy.php?request=http%3A%2F%2Fi11.photobucket.com%2Falbums%2Fa200%2FVindoo%2FJennings%2520GP%2520Jan%252008%2FJENNINGS1-6-08161.jpg&hash=282d803768a8b14a0515cb25affc676dda01db1c)
Title: Re: Tire folding/creasing?
Post by: Jeff on January 16, 2008, 09:19:58 AM
I don't see any darkie coming from it so it looks like it's holding traction pretty well.  If you're running the right pressures according to the distributor, then don't sweat it.  Tires flex.  Granted, I haven't seen one flex quite like this, but I haven't really looked before.

Title: Re: Tire folding/creasing?
Post by: Super Dave on January 16, 2008, 09:21:04 AM
Yeah, that's the way they work.
Title: Re: Tire folding/creasing?
Post by: RSimmons on January 16, 2008, 09:38:54 AM
Quote from: Jeff on January 16, 2008, 09:19:58 AM
I don't see any darkie coming from it so it looks like it's holding traction pretty well.  If you're running the right pressures according to the distributor, then don't sweat it.  Tires flex.  Granted, I haven't seen one flex quite like this, but I haven't really looked before.



Even though that particular picture doesn't show it, the tire was laying darkies and spinning on exit as soon as I started putting power down, according to everyone that was behind me for any period. There was a really noticeable lack of traction from the rear, which is why I'm asking about this. If it was sticking good, I wouldn't worry about it.
Title: Re: Tire folding/creasing?
Post by: Gixxerblade on January 16, 2008, 11:11:36 AM
Pretty sweet!
Title: Re: Tire folding/creasing?
Post by: mikendzel on January 16, 2008, 11:21:12 AM
 :thumb:  on the SuperDuke!!!
Title: Re: Tire folding/creasing?
Post by: RSimmons on January 16, 2008, 11:24:26 AM
Quote from: mikendzel on January 16, 2008, 11:21:12 AM
:thumb:  on the SuperDuke!!!
Thanks! Its my street bike. My race/track bikes were still in the process of getting their winter refresh and weren't ready. Winter be damned, I needed my fix.  (This was at Jennings, Jan 5-6)
Title: Re: Tire folding/creasing?
Post by: Noidly1 on January 16, 2008, 07:18:57 PM
Add Air...
Title: Re: Tire folding/creasing?
Post by: benprobst on January 16, 2008, 08:18:08 PM
Quote from: Noidly1 on January 16, 2008, 07:18:57 PM
Add Air...

Nope.

Do you have experience with Pirelli's? They work alot different than other tires. They flex alot more, and you see pictures of them like that alot. if you look in the for sale section, Gary from BRP is selling his Kawi 650 endurance bikes, someone posted a picture of me on it, at very little lean and the tire is flexing alot putting a huge contact patch on the ground. I normally run Michelins, and even on the stiffer tires the ones with white lettering regularly get rubbed off the sidewalls from the roll over. Id say your lack of rear wheel traction is more likely do to the street geo/suspension on the duke.
Title: Re: Tire folding/creasing?
Post by: RSimmons on January 17, 2008, 01:37:22 AM
Thanks for all the replies. I'm glad to know that's just how Pirellis are. Suspension sounds like its the culprit.