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Old 04-29-2003, 01:23 AM   #1
OnTheGas
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Question 500 Miles of Breaking In Your Tires?

In the Tire Rack's Wheel & Tire Owner's Manual on page 13, it says:
Quote:
Tires are comprised of many layers of rubber, steel and fabric.
Due to these different components, your new tires require a "break-in" period to ensure that they deliver their normal ride quality and maximum performance.

As tires are cured, a "release lubricant" is applied to prevent them from sticking in their mold. Some of the lubricant stays on the surface of your tires, reducing traction until it is worn away.
Five hundred miles of easy acceleration, cornering and braking will allow the mold release lubricant to wear off, allowing the other tire components to begin working together.
Now I don't care about the "release lubricant" making the tires initially slimy or slippery... My butt can tell me how much grip I have to play with and I can adjust my driving appropriately.

What concerns me is the implication that my tires will come together better if I take it easy on them for 500 miles.

Is there any truth to that?

Or am I mis-reading the manual?

Don't know if this makes any difference, but the tires I'm getting are Kumho Ecsta MX 225/50/16 on stock wheels...
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Old 04-29-2003, 08:31 AM   #2
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You are not misreading the manual ... I have S-03's on my car and they difference between brand new and after 700 miles is a vastly different level of traction
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Old 04-29-2003, 11:44 AM   #3
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even 10miles and 50miles was a huge difference on mine...

10miles took a expressway ramp at the speed i usually take it
and the rear spun out and i was doing a doridori powerslide with
zero counter.
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Old 04-29-2003, 03:32 PM   #4
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Question OK, But...

But once the mold lubricant is worn off, do I need to take it easy on new tires for 500 miles?

The option would be drive the hell out of the tires to wear off the lubricant, and then continue to drive the tires as if they were strapped onto a wrx w/an enthusiast behind the wheel...
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Old 04-29-2003, 05:20 PM   #5
kenchan
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i really dont think so. i couldn't tell the difference on the streets
after the lub wore off. just becareful the first couple of
fast turns as it is very slippery.

i also bought it end of Dec so by the time i had more than 1,000
miles, it was spring so it gripped better anyway...
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Old 04-30-2003, 05:21 PM   #6
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That's the best part about new tires is "burning off" the release compound. I like finding a nice empty parking lot to do the aforementioned "burning off".
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Old 04-30-2003, 06:47 PM   #7
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When I got my tires mounted, they seemed a little slippery and kinda loud. They also followed grooves really bad for the first few weeks. They seemed to have calmed down after driving on them for a while.
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Old 05-01-2003, 09:18 PM   #8
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Quote:
They also followed grooves really bad for the first few weeks.
Did you get a wheel alignment done as well? if not, sounds to me like your toe was slightly out of spec & now your new tyres have "bedded in" to your pre-existing wheel alignment specs.
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Old 05-02-2003, 01:49 PM   #9
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I know of a very skilled open track instructor that went off in a big way due to fresh Falkens being greasier than expected. The mold-release goop can make the tires lose grip very suddenly.
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Old 03-05-2020, 02:45 AM   #10
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Default 500 Miles of Breaking In Your Tires?

Quote:
Originally Posted by [email protected] View Post
You are not misreading the manual ... I have S-03's on my car and they difference between brand new and after 700 miles is a vastly different level of traction


I have a different question. While I'm aware the 500 miles is the rule of thumb, I'm guessing it's a "catch all for everyone from grandma to car dude, and beige camry to M3". Kind of like the yellow MPH signs which is the safe speed for EVERYONE from winnebago's to track prepped mini's.



What I wanna know: can I intentionally break in the tires, what procedure would that be, and how many miles would it take?

Last edited by chimchimm5; 03-05-2020 at 11:03 AM.
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Old 03-09-2020, 07:32 AM   #11
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I'm pretty sure what's going on with a "500 mile break-in" is a few gentle heat cycles. Tire durability including a much lower risk of chunking a tire if you were to take in a track day early in your tires' life. This effect is separate from the mold release matter.

You'll find Tire Rack's discussion of Heat Cycling under their Competition Tire Information heading down at the bottom of those topics. The effect isn't necessarily limited to R-compound tires and full-on race slicks; tires down at least into 'Max Summer Performance' also seem to benefit, if a set of 285/35-18 MPSS tires having seen around a dozen HPDE track days (intermediate/advanced) is any indication. They actually had closer to a thousand miles on them before hitting the track for the first time.


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Old 03-20-2020, 09:39 PM   #12
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https://blog.tirerack.com/blog/hunte...le-and-shaving

This is not enough information. It just recommends "heat cycling" and why it works... and a service we provide. Not how to heat cycle.

That's ok. I didn't have much hope that the details would be found here.
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Old 03-21-2020, 09:55 AM   #13
Norm Peterson
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Tire Rack is almost certainly trying to get the heat cycling essentially completed in one shot. They do note that you can do this yourself and I've read where a carefully driven track session - a throw-away session as far as lap times are concerned - can accomplish a similar result.

If you're using street driving for your heat cycling, you should start out driving fairly gently (maybe up to 0.3-ish g's) and just drive. Gradually increase the degree of, let's call it 'enthusiasm' in the corners as the miles accumulate. Save any intentional beyond-half-a-lateral-g stuff for after you've driven on them a while.

I've never seen any sort of specific procedure; that's just the way I've always broken in tires for my cars because I do tend to push them in the corners more than most.


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Old 03-24-2020, 10:28 PM   #14
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Breaking in the tires and wearing off the release stuff makes sense.

On my old KLR Id drive straight to a gravel road when replacing the tires to break them in. Knobbies on road can be sketchy, new knobbies on road are scary!
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Old 03-26-2020, 10:11 AM   #15
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Throughout the various sets of RE-71R's I have ran on track I usually tried to have this recommended ~500miles of mixed street driving before any HPDE events.

One time however, I went straight on track with fresh tires and had a few highly entertaining but very slow, slippery laps to contend with . At least it was during the first/warm-up session! I did not notice much of a difference in tire life between this set and any of the others, but these tires are pretty much get ran solely on track so I can't speak to a serious difference in long-term life under normal street use.
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Old 03-30-2020, 07:59 PM   #16
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huge difference especially living in snow conditions, just picked up some Continental control contact sport SRS, i absolutely love them highly recommend
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Old 03-31-2020, 02:13 PM   #17
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I think new tires because of how much oils is in the rubber will appear a bit greasy. Once these oils is released after a couple heat cycle, the rubber will become harder and more stable.
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Old 04-06-2020, 04:23 PM   #18
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I had a set of tires years ago that the first few days felt down right dangerous, and that car had 0 power.
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