DCSportbikes.net  
» Help Support .NET!
DCSportbikes Premier Membership for 25$ per year. Discounts! Click here for full information.

Now available in the .NET Shop:



Get your DCSBN Gear!
» Shoutbox
Sorry, only registered users have the ability to use our real-time shoutbox to chat with other members.

Register now, it's free!
» Online Users: 558
7 members and 551 guests
2blueyam, beatle, CCS762ZX6, legendindisguise, Sal_the_man, Speed3, tonetone
Most users ever online was 4,519, September 2, 2015 at 03:26 AM.
Go Back   DCSportbikes.net > Sportbike Operation > Test and Tune

Reply
LinkBack Thread Tools
Unread
  (#1)
GP Racer
 
KneeDragr's Avatar
 
Posts: 1,116
Join Date: January 16, 2003
Location: Arlington
March 1, 2004, 10:03 AM

Seems like the case with all 3 guys I rode with this weekend that our tires looked significantly worse after Sundays ride. Didnt ride very far, to 211 and back. They looked bad enough that all of us swore not to ride at a brisk pace again before getting new tires.

They didnt look bad before leaving, and the pressures were fine. Could the months of inactivity degraded the rubber somewhat?
  Send a message via AIM to  
Reply With Quote
Unread
  (#2)
GP Racer
 
OneFunR6's Avatar
 
Posts: 1,174
Join Date: September 30, 2002
Location: going west...
March 1, 2004, 10:43 AM

All tires have waxes, oils and other chemicals mixed into the rubber to improve the grip and handling properties of the tires. In motorcycle tires these additives are designed to be very temperature sensitive, hence the use of tire-warmers on race tires, which are designed to operate at much higher temps than street tires. All tires are subject to the loss of these additives due to "heat cycling". In the "olden days", before the advent of specialty tires, some cycle shops would put new tires up on the roof during the summer to "heat cycle" the tires w/o any tread wear. These were then asked for and sold as the 1st "touring" tires. The heat cycling process is also known as "out-gassing", as the additives will "out-gass" b/c of the heating of the tire and the centrifugal force of riding on them. This is the main reason that track tires are actually worse on the street than street tires, b/c race tires rarely get as hot as intended for performance and are not designed for more than a few heat cycles, and thus quickly loose their stickier 'advantage' [if they even have one at street speeds, as tires cool off very quickly] after just a few (10-20+) heat cycles. Tires that sit, particularly those that are inflated, can have this out-gassing problem, too, due to temp changes during long term storage and the air pressure pushing on the rubber from the inside. This may be one reason for the sudden tire wear. Most cycle tire manufactures will not ship tires to the shops after they have been sitting for a certain time period. Hope this helps.

ps, I am not making this up! lol! I have a friend w/a PhD. in chemistry who works for Michillen.


“To announce that there must be no criticism of the president,
or that we are to stand by the president right or wrong, is not
only unpatriotic and servile, but is morally treasonable to the
American public.” -Theodore Roosevelt
  Send a message via AIM to Send a message via AIM to OneFunR6  
Reply With Quote
Unread
  (#3)
GP Champ
 
ThrustinJZX6's Avatar
 
Posts: 2,014
Join Date: October 15, 2003
Location: I should have my own website
March 1, 2004, 11:11 AM

...in other words, yes.

I rode a good ride with Steve and BamBam. When I go home I noticed that there was significant pilling on the rear tire that i've never seen before...now that may have been bacause I was trying wheelies all day...or it could have been because of these out-gasing temperature changes.

Anything that sits degrades, but it's nothing out of the ordinary. Also, don't put anything on your tires off-season.
  Send a message via AIM to Send a message via AIM to ThrustinJZX6  
Reply With Quote
Unread
  (#4)
Railing!
 
Posts: 460
Join Date: February 4, 2003
March 1, 2004, 12:19 PM

Quote:
Originally Posted by ThrustinJZX6
...in other words, yes.
Thank you, there is no way im reading a long post by that guy.
  Send a message via AIM to  
Reply With Quote
Unread
  (#5)
GP Champ
 
ThrustinJZX6's Avatar
 
Posts: 2,014
Join Date: October 15, 2003
Location: I should have my own website
March 1, 2004, 12:38 PM

It hurt my head.
  Send a message via AIM to Send a message via AIM to ThrustinJZX6  
Reply With Quote
Unread
  (#6)
GP Racer
 
OneFunR6's Avatar
 
Posts: 1,174
Join Date: September 30, 2002
Location: going west...
March 1, 2004, 01:26 PM

Quote:
Originally Posted by ScOrCh
Quote:
Originally Posted by ThrustinJZX6
...in other words, yes.
Thank you, there is no way im reading a long post by that guy.



“To announce that there must be no criticism of the president,
or that we are to stand by the president right or wrong, is not
only unpatriotic and servile, but is morally treasonable to the
American public.” -Theodore Roosevelt
  Send a message via AIM to Send a message via AIM to OneFunR6  
Reply With Quote
Unread
  (#7)
GP Champ
 
ThrustinJZX6's Avatar
 
Posts: 2,014
Join Date: October 15, 2003
Location: I should have my own website
March 1, 2004, 01:26 PM

  Send a message via AIM to Send a message via AIM to ThrustinJZX6  
Reply With Quote
Unread
  (#8)
Ballaugh Bridge
 
CrazyMotorcycleGuy's Avatar
 
Posts: 6,871
Join Date: September 29, 2002
Location: VA
March 1, 2004, 03:22 PM

Ozone is a major contributor to tire degradation.

I'm curious as to what type of tires are in question. I know of a certain tire that was on my bike while it was in the shop for 9 months (I was deployed for the last 7 of those months). When I got back to riding these tires were even crappier and wore very fast. I had these same tires on another bike once and found that the last .25" of useable (before wear indicators) rubber wears extremely fast.

I put the original (from new, but now with 3500 miles) tires back on and turned faster lap times than I had when the previously mentioned tires were new.


'08 MARRC Expert Racer of the Year
2009 #3 Combined Overall Championship

  Send a message via AIM to  
Reply With Quote
Unread
  (#9)
boxing twins
 
hayabusafiend's Avatar
 
Posts: 581
Join Date: April 6, 2003
Location: Northern California
March 1, 2004, 04:19 PM

Quote:
Originally Posted by SVbadguy
Ozone is a major contributor to tire degradation.
Electric motors produce ozone. The larger the electric motor, the more ozone produced. So, keep the tires away from freezers and refrigerators (and heaters for that matter) in your garage.


-- Chris
BMW R1100s
(previous rides: '82 KTM250, '95 CBR600F3, '98 Buell S3T, 2000 Hayabusa, 2008 R1200R)

"Any sufficiently advanced technology is indistinguishable from magic." -- Arthur C. Clarke
  Send a message via AIM to Send a message via AIM to hayabusafiend  
Reply With Quote
Unread
  (#10)
GP Racer
 
KneeDragr's Avatar
 
Posts: 1,116
Join Date: January 16, 2003
Location: Arlington
March 1, 2004, 04:22 PM

Quote:
Originally Posted by SVbadguy
I'm curious as to what type of tires are in question.
As it turns out, all 3 of us are running Pirelli's.
2 running Supercorsa race compound, 1 running Diablo Corsas.
  Send a message via AIM to  
Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.3


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0
vBulletin Skin developed by: vBStyles.com
All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest © 2002-2010 by DCSportbikes.net. DCSportbikes.net is owned by End of Time Studios, LLC.