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Chac Bolay
2014.07.24, 07:17 PM
Hi Guys,
We are having some trouble at our track with the front tires, specifically 15 and 20 PN (slicks and X-type).

We have used them for a long time on the rough side and recently flip the track over to the smooth side (about 4 weeks ago).

We have to clean the smooth side, because it had so much dust and was very slippery. Afterwards the grip was so much better than our rough side, but over the weeks some friends starting noticing that the front tires were loosing grip during the races. This last week the problem increased to all racers (except the ones using Kyosho front).

We noticed that the tires were glossy after running and when touching them the feel was not rubbery. It looks as if the surface crystallized.

Some guys true them before racing and after some laps, they start loosing grip. The novice racers show glossy tires on both front tires, but on cars of expert racers show mostly on right front.

Any idea why is this happening?

ChiMiniRc
2014.07.25, 03:21 PM
Hi Guys,
We are having some trouble at our track with the front tires, specifically 15 and 20 PN (slicks and X-type).

We have used them for a long time on the rough side and recently flip the track over to the smooth side (about 4 weeks ago).

We have to clean the smooth side, because it had so much dust and was very slippery. Afterwards the grip was so much better than our rough side, but over the weeks some friends starting noticing that the front tires were loosing grip during the races. This last week the problem increased to all racers (except the ones using Kyosho front).

We noticed that the tires were glossy after running and when touching them the feel was not rubbery. It looks as if the surface crystallized.

Some guys true them before racing and after some laps, they start loosing grip. The novice racers show glossy tires on both front tires, but on cars of expert racers show mostly on right front.

Any idea why is this happening?

I can't say this is the answer but is it safe to say no one has used silicon based tired? Does anyone use any sort of "tire compound" like alcohol, Simple Green, lighter fluid, etc?

dwight
2014.07.28, 08:58 PM
I don't know why there getting like that but you can use wd40 on them and they should work. Make sure you put a light coat on and let it dry and they should work fine and bring the traction up on your track.

herman
2014.07.30, 05:43 AM
can you post some pics? i've read somewhere on the forums that tires used to have silicone in them, and caused the track to kind of oil up and after a while everybody had problems with traction... i believe pn came out with tires that are rcp specific, and is made of rubber... hope this helps...

herman
2014.07.30, 05:54 AM
from kenon - they have the c (carpet) series and r (rcp) series tires...

New C Series items, rear tire 8 degree,
This is V-Groove and Low Profile desgin, no need break in the tire, you can use this tire for first round racing.

C Series:
For racing carpet, very soft compound with silicon to increase traction.

We also incorporate new tire testing method and grading system.
These tires are also very consistent form batch to batch. Simply the best tires on the market right now.

Our latest PN Racing tires are results of over a year of testing and research. We have created these two series of new compound, that are specifically design for running on the most common racing surface.

We also incorporate new tire testing method and grading system. These tires are also very consistent form batch to batch. Simply the best tires on the market right now.

R Series:
For RCP and similar foam track, they have excellent tire life with very high grip.

Chac Bolay
2014.07.31, 05:30 PM
Hi Guys,
Thanks for your comments.

I will get a picture of the tires finish, so you can look at them.

We just flipped to the smooth side (about a month ago), and cleaned the RCP tiles with Simple Green Crystal.

We only allow PN and Kyosho tires.

Chac Bolay
2014.07.31, 05:41 PM
I forgot, alcohol is allowed to clean the tires and WD40 has been used by some racers.

Could it be an overheating problem due to high traction?

I tested this week Kyosho 40 slicks up front and they lost grip after some laps.

The only tires till now that don't lose grip, are Kyosho 30 slicks.

herman
2014.08.01, 04:37 AM
kyosho 30's are softer than the 40's... so they'll have more grip than the 40's...

mleemor60
2014.08.01, 06:30 AM
I forgot, alcohol is allowed to clean the tires and WD40 has been used by some racers.

Could it be an overheating problem due to high traction?

I tested this week Kyosho 40 slicks up front and they lost grip after some laps.

The only tires till now that don't lose grip, are Kyosho 30 slicks.

Alcohol is a drying agent which can over time extract all the natural moisture from the tire. WD-40 is petroleum based which in a short time interacts with the rubber to soften and actually dissolve it. Petroleum products do not play well with rubber products. Over time you will begin to wear a depression into the track surface brought on by the chemical reaction between the products. You have the correct answer already. K20 rear and K30 fronts in either slicks or radials. Issue corrected.

Chac Bolay
2014.08.01, 06:25 PM
Hi guys,
Here are the pictures from the tires.

On the first picture it's more noticeable the glossy finish after racing (left tire).

https://dl.dropboxusercontent.com/u/28705070/Miniz%201.jpg

https://dl.dropboxusercontent.com/u/28705070/Miniz%202.jpg

dwight
2014.08.01, 06:54 PM
There is some slot car tire compound it's made by scale auto this will work on any kind of tire.

mleemor60
2014.08.01, 06:58 PM
Both of these tires weren't run on the same car were they? On the same track for the same time period? If run on different cars what are the spring, camber, toe settings and caster of the different cars. Basically it looks like one set up is tire dependent and the other is suspension dependent.

Chac Bolay
2014.08.01, 08:03 PM
Both of these tires weren't run on the same car were they? On the same track for the same time period? If run on different cars what are the spring, camber, toe settings and caster of the different cars. Basically it looks like one set up is tire dependent and the other is suspension dependent.

mleemor60, both were used on the same car.

The one not set on the car, was used on the rough side about a month ago.

The glossy one, was run this week on the smooth side. It even was trued before racing (you can still see the grooves from the truer). This is how front tires finish and lose traction.

mleemor60
2014.08.01, 08:24 PM
Got it. Try running the truer at a lower voltage so it turns slower and then cut slower as well. You may be cutting fast enough to actually heat cycle or inure the carcass of the tire. The additional hardness caused by doing it to fast could be the root cause of your issue . The traction on the slick side is so much higher than the rough side that you may want to go a little stiffer on springs with more static camber and as little caster as possible. Do you have access to a pyrometer? Check temperatures from side to side right after a run and compare it to the temperature right after they are trued.

The simple answer is to go to the tire that works. Consistently. On either side of the RCP. When we raced on the slick side tire wear went to virtually zero without loss of performance.