Has anyone ran the MX run flats? I need tires and have read alot about the regular MX.

thanks

 

I replaced my Firestone Firehawks with them and love them. Have had several long road trips with them. Smooth ride, great traction, and good price. Zuti

 

I just installed the Kumho Ecsta Mx Run-flats. I've only run them a couple hundred miles so far, but, I like them alot. Much better ride than the original Goodyear, and though I haven't driven very hard yet, I don't notice any adverse handling issues. Good price, and very good looking tire. I bought mine from Tire Rack and had them 2 days later!

 

thanks for the info I will be ordering a set today.

 

I just looked on the Kumho web site (www.kumhousa.com) at their write up for the Ecsta MX and there is no mention of run-flat. Only reference that I could find to run-flat was reference to the Vette original equipment tires. Sure they are run-flats? I was wanting to look up the specs to see if they were repairable after a run-flat condition.

Edit: Also check the TireRack site and they do list them as "run-flat" but give no details. In fact the specs do not mention run-flat.

tom...

 

Tom,
I cut and pasted this from Tire Racks web site. When you get to the Ecsta MX, click on the left hand side by the photo of the tire for the specs. Zuti

Kumho ECSTA MX (Max Performance Summer)
for 1998 Chevrolet Corvette
Front: 245/45YR17 RunFlat
Blackwall
RunFlat
Service Description: 95Y
UTQG: 220 AA A Price: $173 each
Estimated Availability:
In Stock Front:
012345678

Rear: 275/40YR18
Blackwall
RunFlat
Service Description: 99Y
UTQG: 220 AA A Price: $238 each
Estimated Availability:
In Stock

 

They say "run-flat" on the sidewall. Might be a typo???

 

Makes you wonder why the factory web site does not say anything about them being run-flats.

 

Just ordered a set for my fronts today!

If I get em mounted/ balanced this weekend, I'll post my thoughts!

 

The Kuhmo Ecsta MX is NOT a run flat tire. Kuhmo introduced a new EMT tire in 2003 called the Ecsta MX XRP specifically made for Corvettes. The press release is here: http://www.kumhousa.com/news/news2002.asp

The tires listed on tirerack don't say anything about XRP, but I would assume they are at $173/$238 F/R. Discount tire is selling the Ecsta MX for $127/$176 F/R which I would assume are not XRPs. Measure 2x, cut once.

 

The Kuhmo Ecsta MX is NOT a run flat tire. Kuhmo introduced a new EMT tire in 2003 called the Ecsta MX XRP specifically made for Corvettes. The press release is here: http://www.kumhousa.com/news/news2002.asp

The tires listed on tirerack don't say anything about XRP, but it does state run flat. I would double check with them. Measure 2x, cut once.

 

If you look under the specs for the Ecsta MX it does have runflats listed. I copied this list of specs from the Kuhmo website.

ECSTA MX


205/50R15 86W BSW 5.5 - 7.5 23.1 8.5 on 6.5 8.5 220/AA/A 20
205/55R16 91W BSW 5.5 - 7.5 25.1 8.5 on 6.5 8.5 220/AA/A 20
225/50R16 92W BSW 6.0 - 8.0 25.1 9.3 on 7.0 8.5 220/AA/A 26
205/40R17 * 84Y BSW 7.0 - 8.0 23.5 8.4 on 7.5 8.5 220/AA/A 20
215/40R17 83Y BSW 7.0 - 8.5 23.9 8.7 on 7.5 8.5 220/AA/A 20
215/45R17 87Y BSW 7.0 - 8.0 24.7 8.5 on 7.0 8.5 220/AA/A 20
225/45R17 91Y BSW 7.0 - 8.5 25.1 8.9 on 7.5 8.5 220/AA/A 22
235/45R17 94Y BSW 7.5 - 9.0 25.5 9.4 on 8.0 9 220/AA/A 20
245/40R17 91Y BSW 8.0 - 9.5 24.8 9.9 on 8.5 9 220/AA/A 23
245/45R17 95Y BSW 7.5 - 9.0 25.8 9.7 on 8.0 9 220/AA/A 26
245/45R17 ** 95Y BSW 7.5 - 9.0 25.8 9.7 on 8.0 9 220/AA/A 32
255/40R17 94Y BSW 8.5 - 10.0 25.1 10.3 on 9.0 9 220/AA/A 25
255/45R17 98Y BSW 8.0 - 9.5 26.1 10.1 on 8.5 9 220/AA/A 20
275/40R17 98Y BSW 9.0 - 11.0 25.7 11.0 on 9.5 9 220/AA/A 28
285/40R17 100Y BSW 9.5 - 11.0 26.0 11.5 on 10.0 9 220/AA/A 20
215/35R18 84Y BSW 7.0 - 8.5 23.9 8.7 on 7.5 8.5 220/AA/A 20
225/40R18 88Y BSW 7.5 - 8.0 25.1 9.1 on 8.0 8.5 220/AA/A 22
235/40R18 91Y BSW 8.0 - 9.5 25.5 9.6 on 8.5 9 220/AA/A 23
245/40R18 93Y BSW 8.0 - 9.5 25.8 9.9 on 8.5 9 220/AA/A 25
265/35R18 93Y BSW 9.0 - 10.5 25.4 10.8 on 9.5 9 220/AA/A 26
275/35R18 95Y BSW 9.0 - 10.5 25.7 11.1 on 9.5 9 220/AA/A 20
275/40R18 99Y BSW 9.0 - 11.0 26.7 11.0 on 9.5 9 220/AA/A 20
275/40R18 ** 99Y BSW 9.0 - 11.0 26.7 11.0 on 9.5 9 220/AA/A 36
295/35R18 99Y BSW 10.0 - 11.5 26.1 11.9 on 10.5 9 220/AA/A 31
235/35R19 91Y BSW 7.5 - 9.0 25.5 9.6 on 8.5 9 220/AA/A 20
245/35R19 93Y BSW 8.0 - 9.5 25.8 9.9 on 8.5 9 220/AA/A 20

Notes:
*Extra Load, **Corvette Run-Flat Sizes

 

if you go to valcantire.com they have two listings for the khumo mx reg and runflats listed at bottom of list

 

Has anyone seen the standards for how far the Kumho can go in run-flat condition before the tire has to be replaced?