TAG tires

[David Yourd]

Does anyone know if we can run YHC's at the club races this year or only the MG SLE's? Do you know how they compare?

Also, I have a new set of MG yellows if anyone wants to make me an offer.

[JET Karting - Andy Finke]

David-

TAG will be on SLE's this year. YHC's are not allowed at the club races.

Last year we were on Yellows club racing because TAGUSA changed the tire within weeks of the start of the season. If you remember, that caused quite a confusion for CES Tag racing as well.

Are your yellows new?


Andy

[David Yourd]

Thanks Andy. I thought I read last yeat that you were allowing YHC's to run as well. Would I be allowed to run a race with YHC's and take the DQ?

Yes the yellows are new, I bought them from you. But, they have been mounted and dismounted once.

Do you know if the MG's and Stones are similar? It would be nice to use the club races to set up for the big ones you've planned for this year, I need all the unfair advantage I can get.

Dave

[JET Karting - Andy Finke]

The two tires are VERY similar in the first week. In a TAG kart, I'll change my setup more for afternoon to evening temp change than I do to go from Yellow's to C's.

The biggest reason we are supporters of MG is the heat cycles they will take. Generally, you'll see 2-3 times the heat cycles over Bridgestone. Take a look over at ekn on the thread about the cadets going to YHC's.

If you are getting uneven tire wear, give us a shout. It's likely either chassis tuning or driver habit that needs changing. All four tires should wear quite even.




TIRE TECH 101: This may be old news for some, others not...


There are two ways to wear out a set of tires; tread wear and heat cycles.

Tread wear is obvious. Look at the wear dots and see how much rubber is left. Go to far and the cords show. VERY easy to see.

Heat cycles are tougher to tell. A heat cycle is anytime the tires come up to temp, and then go back to ambient. This could be a 4 or 40 lap session. When this happens, the tires actually harden some. Every time. So if you are fast, you will find that heat cycles will slow you down before the tire is out of tread.

Top runners will generally agree that YHC's will heat cycle a couple to several tenths slower after the first 'day' of use. MG's will stay consistent or 2-3 days, as long as you wear them evenly through chassis setup and driving well. (But that can be a whole other topic...) We think club racing should be made as simple to figure out as we can make it without sacrificing quality. MG's are a step in that direction.


Andy

[D. Harrington]

Dave,

I second Andy's opinion on the MG SLE tires. They are still very competitive after numerous heat cycles.....unlike the YHCs. We were able to run one set of SLE tires for the entire weekend at the Man Cup events (as most others did) and remain competitive. New YHCs seem to be worth about 3-6 tenths over used ones which forces you to buy new tires if you want to be up front. The SLE (blues) will be called the HZ in 2008 and will be labeled red.
http://www.ekartingnews.com/news_info.php?n=9290

[MPIGP - Phillip Gordon]

Does anyone know if we can run YHC's at the club races this year or only the MG SLE's? Do you know how they compare?

Also, I have a new set of MG yellows if anyone wants to make me an offer.

I'll buy them if they're 7.10 rears. Shoot me an e-mail CoolBreezeRacer@aol.com to arrange payment and pick up.

[Jim R]

Andy, What is the hardness of the SLE blue or will it be the HZ red? I went to the MG web page but no HZ and conflicting info about the blue as far as hardness.
Thanks
Jim

[JET Karting - Andy Finke]

I'm not sure without looking, and I'm not where I can look...

BUT, I'm pretty sure its like 2-3 points harder on the durometer. Not a significant amount, but in the 'money saving' direction.


Andy

[MPIGP - Phillip Gordon]

Andy, What is the hardness of the SLE blue or will it be the HZ red? I went to the MG web page but no HZ and conflicting info about the blue as far as hardness.
Thanks
Jim

Jim

The durometer reading of the SLE blue (or HZ red in 2008) is 58 per MG measurement. In comparison, the FZ Yellow is 50 and the KZ green is 46.

[Jim R]

I am all in on longer lasting tires. Last season was brutal running two karts in sr. tag. A few extra races here and there are very welcome.
I would think 58 compared to the yellows 50 is a large difference. When I was done with yellows they were either to the threads or durometer reading of 56 or so.

[MPIGP - Phillip Gordon]

I am all in on longer lasting tires. Last season was brutal running two karts in sr. tag. A few extra races here and there are very welcome.
I would think 58 compared to the yellows 50 is a large difference. When I was done with yellows they were either to the threads or durometer reading of 56 or so.

Jim

Yes it is a big difference, but with proper chassis setup the yellows last a surprisingly long time. However, if the chassis is tight, they will wear out pretty quick.

The SLE/HZ is more forgiving when the setup is off and won't get chewed up as fast. Consequently, with the proper setup, they will last a very long time. I understand the 2007 Granja 500 was run on SLE tires and most of the teams only used 6 tires.