Just purchased a 2000 C-5 w/17K,original tires--Does anyone know if Goodyear has improved the EMT since 2000. ie, Road noise, handling, traction, etc. The ones that are on my car really need some help.

 

The new generation GM runflats on the C6 are supposed to be better. Softer sidewall, but less mileage without air than the ones on your car. But, I don't think they make them in the C5 stock sizes. This may have changed since I last check several months ago.

Jeff

 

Get some regular z rated tires The ride feels so much better; not noisy and it feels light and agile.

 

I haven't heard that they improved the original C5 EMTs - I went with a set of Firestone Firehawks and like them. Not sure if they make those anymore though.

 

I just installed the Mitchlin all season run flats and love em.

 

i have had several sets of firestones on mine and its night and day difference over the GY run craps....my parents still have the original tires on their 2002 and its soo much quieter, even with my loud mouth exhaust mine still quieter.

 

Okay so I'm new to this game and still learning. My '01 C5 has the runflats but my question is, what does EMT stand for???? Please don't laugh like that, I can see you!! Thanks guys, it's appreciated.

 

Extended Mobility Tire

 

Better Goodyear F1 EMT's is an Oxymoron

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A Newbie! Why, congratulations, and, a warm welcome to the CF family. And, yes, the EMT's are the "Extended Mobility Tires". However, they are more affectionately, OR, should I say PRECISELY known as "Runcraps". Regardless, there are a multitude of tire brands available to you. Enjoy your new C5, and, welcome to the fold.

 

I'm about to buy a set of the Michelin EMTs to replace the Badyears. I've heard nothing but good things about them.

From what I understand, the Michelins are repairable if you get a puncture on the tread, where the Firestones are not repairable at all.

 

All right, I'll be the one to ask.....what is so wrong with the EMT's that I need to fork over a grand for some new rubber. I'll start saving if the reasons are good enough.

 

The Goodyear F1 EMT tire is able to provide you with a 50 MPH road speed for up to 200 miles with no air pressure in the tire. In order to achieve that, back in the mid 1990's when the tire was developed, special compounds were developed for the tire construction and special reinforcements were put into the side walls of the tire. The compounds resisted the heat build up from running with low air, and the stiff sidewalls prevents the rim from cutting into the tire when deflated.

However ... that was 1990s technology and were some tradeoffs.

The tires are crazy heavy, heavy tires affect your vehicle dynamincs adversely. Switching to lighter tires will improve your cars handling.

The extra stiff sidewalls also make it easy for the car to "track" in ruts on the road way. There is one section of I-15 here in San Diego that grab onto the front of the car like a pit bull.


The compounds and the stiff sidewalls limit the tires ability to provide the most grip during acceleration... although you've realized that the C5 Corvette is no slouch, you can make it better.

The most important factor people consider when switching from Goodyear EMTs .. the noise. Oh god are they noisy...

Oh yeah.. cost. Non run-flat tires cost less to replace... so although you're spending some cash now to replace them, down the road they'll hit you for less.

 

Excellent reply. I appreciate the response. I see I have something else to buy this coming spring/summer.

 

I replaced the Goodyear runflats when they were worn with an identical Goodyear runflat set. To me, they were worth their weight in gold the day my wife and young daughter picked up a "body bolt" on the road that ruined one of them, ...but they were still able to drive it 85 miles to my garage. What is peace of mind worth?

 

Kumho ECSTA ASX all weather for me. Tried the BF Goodrich to noisy.

 

Don't know about tire improvements, but we discovered an odd way to make the Goodyear GSC EMT's run quieter, smother, and softer.

Increase the tire pressure.

On our 1994 C4 with FX3, an increase from 30 to 33 made a world of difference.

On our 2000 C5 with F45, an increase from 30 to 32 also made it ride better (but still too new (to us) to decide how far about 30 we will end-up).

btw, what prompted the pressure change on our 1994 was learning GM has reduced the tire pressure in 93/94 from 35 PSI to 30 PSI due to harsh ride complaints.

 

I Just Purched A New Set Of Yokohama Avs Sports, Emt's And Absolutely Love Them. Had A Set Of Badyears(goodyear) Will Never Have Goodyear Again.

 

I'm partially torn between the prospect of having better tires versus the peace of mind of being able to make it home or to a tire place if i have to. I think it's worth having the runcraps if you drive it daily. If it's a weekend car only. Ditch those suckers! and ehem, lol, send them to me, lol. I could use another set.

Shane

 

I thought my Goodyears were fine when they had plenty of tread, but handling certainly suffered as they wore. I suspect that's true for any tire as it wears down.

I recently replaced my worn out Goodyears with Michelin Zero Pressure All Season tires. The Michelins are smoother (they're new!), but I can't really tell that the handling increased markedly (except for less groove-tracking, but once again, they're new), and the car seems to 'float' more at higher speeds. They are, however, significantly cheaper than the Goodyear EMTs.

In my opinion, the Goodyears looked better on the car. The rears seemed wider in appearance and to have a flatter looking tread than the Michelins.