Race Car Tech Discuss anything related to road racing and auto X.

Heat cycled tires

Old 05-15-03, 09:22 PM
  #1  
Rotary Enthusiast
Thread Starter
iTrader: (14)
 
wickedrx7's Avatar
 
Join Date: Apr 2001
Location: Chicago
Posts: 1,297
Received 0 Likes on 0 Posts
Heat cycled tires

What is the reason for buying Heat cycled tires? I thought that to many heat cycles on a tire was bad for a race tire.
wickedrx7 is offline  
Old 05-16-03, 12:22 AM
  #2  
Rotary Enthusiast
10 Year Member
 
rhinor61's Avatar
 
Join Date: Mar 2002
Location: California
Posts: 819
Likes: 0
Received 0 Likes on 0 Posts
ok, we have been down this road before, but one more time.

The first time a competition tire is used is the most important. Durning that run, its tread compound is stretched, some weaker bonds between the rubber molecules will be broken, which generates some of the heat. If the tires are initially run too hard or too long, some of the stronger bonds will also be broken which reduces the tire's grip and wear qualities. Running new tires through an easy heat cycle first, and allowing them to relax allows the tubber bonds to relink in a more uniform manner than they were orginally manufactured. It actually makes them more consistent in strength and more resistant to losing their strength the next time they are used.
As per TireRack.


John
rhinor61 is offline  
Old 05-16-03, 06:14 AM
  #3  
Lives on the Forum
10 Year Member
 
Join Date: Sep 2001
Location: IN
Posts: 6,131
Likes: 0
Received 1 Like on 1 Post
IMHO, Tire Rack's heat cycling doesn't really heat cycle a tire as thoroughly as a true track scrubbing. Scrubbing in tires is when you run the tires for a few warm-up laps working the tires up to operating temperature. Once the tires are warmed, pit in, and remove the tires from the car, and let them "cure" for 24 hours (away from sunlight and electric motors). Once cured the tires will be ready to give you consistent performance and longer wear. Tire Rack's heat cycling does NOT get the tires anywhere close to operating temps, and offers no tangible benefits to true tire scrubbing.

Last edited by SleepR1; 05-16-03 at 06:17 AM.
SleepR1 is offline  
Old 05-16-03, 07:13 AM
  #4  
LS6 Convert
5 Year Member
 
redrotorR1's Avatar
 
Join Date: Jan 2002
Location: Austin, TX
Posts: 1,827
Likes: 0
Received 0 Likes on 0 Posts
Re: Heat cycled tires

Originally posted by wickedrx7
What is the reason for buying Heat cycled tires? I thought that to many heat cycles on a tire was bad for a race tire.
Like the previous posts have said, it's basically a break-in for the tires. All tires have release compounds in them, which will scrub off in the first few miles. Running the tires (and wheels) to operating temp allows this process to complete. Whether or not Tirerack's heat-cycling is effective, it's your call. I do it myself, 'cuz I like having the extra $60 in my pocket. Proper heat-cycling of a brand new r-compound tire will increase the life of the tire.

You are also correct that too many heat cycles will harden an r-compound tire and reduce its stickiness. That's where Formula V comes in handy ...
redrotorR1 is offline  
Old 05-16-03, 07:19 AM
  #5  
Rotary Freak
10 Year Member
 
vudoodoodoo's Avatar
 
Join Date: Aug 2001
Location: Boston, MA
Posts: 1,635
Likes: 0
Received 0 Likes on 0 Posts
I thought you just put em in the dyer and use the hottest settting.
vudoodoodoo is offline  
Old 05-16-03, 10:01 AM
  #6  
LS6 Convert
5 Year Member
 
redrotorR1's Avatar
 
Join Date: Jan 2002
Location: Austin, TX
Posts: 1,827
Likes: 0
Received 0 Likes on 0 Posts
Yeah, but the local laundromats get pretty pissed off about that ....
redrotorR1 is offline  
Old 05-16-03, 10:50 AM
  #7  
Senior Member
5 Year Member
 
Join Date: Dec 2002
Location: cali
Posts: 639
Likes: 0
Received 0 Likes on 0 Posts
One exception to the rule may be Toyo RA1s, they seem to get stickier, until they reach cords. Of course that's a good thing since initially they are not as fast. If you are going to run them all the time, I would get RA1s, otherwise V700s. Carl
in2twins is offline  
Old 05-23-03, 02:47 PM
  #8  
Rotary Enthusiast
5 Year Member
 
specRX7_22's Avatar
 
Join Date: Nov 2002
Location: Eastern PA
Posts: 1,014
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by SleepR1
IMHO, Tire Rack's heat cycling doesn't really heat cycle a tire as thoroughly as a true track scrubbing.
i agree
specRX7_22 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
rx7jocke
Suspension/Wheels/Tires/Brakes
72
06-17-16 03:48 AM
The1Sun
New Member RX-7 Technical
5
09-15-15 04:45 PM
The1Sun
1st Generation Specific (1979-1985)
0
09-07-15 10:21 PM


Thread Tools
Search this Thread
Quick Reply: Heat cycled tires


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: