MarcusDubya77

FYI...Had my first bad experience with the runflats today. Was attempting to pass a car today as the road went from 50 to 100KPH and the car broke traction and I was sliding and fishtailing for what felt like 250 ft. Luckily, I was able to regain control. There were two other contributing factors to this. First, the temperature dropped from 34-32 at some point along my drive. Also, German roads are pretty well maintained and this one happened to be recently repaved and damp. Even with these factors, I expected more from these tires. I have driven through snow in Colorado on Hankook Ventus V2 with no problem in a 550 HP RS4....I will be swapping in the near future for some PSS's, most likely.

speedlaw

My only complaints about the car ARE the RFT-s. I've been through this with BMW, and when the RFT wear out, Michelin AS/4 and a AAA card.

redrocket190

Just swapped to Michelin Pilot Sport 3+ A/S. Ride quality improved immensely. Unusual vibrations and droning from rear of car gone. However am in for 2nd cracked rim repair. Hoping new more pliant tires will be better protection.

MarsRedCLK

Anyone go to 235/265 set of say the Pilot Sport 4s on stock rims ? To get a bit more meat on the road ?
Yes I understand that wider does not necessarily mean that same 10mm wider unless the rim can handle that.

A little more sidewall, slightly taller, and some extra meat on the road. Any issues with abs/traction control ?

EdC43AMG

One question. Those runflats are suppose to have specific label/sign in the tire side, isn't it?

Are the MO tires runflat? or only the MOE as suppose to be?

The dealer has the car and the tires it comes with are MO, Dunlop Sportmaxx RT, 93Y & 96Y XL. "XL" for extra load bu those are not runflat as far as I know. I am confused as everybody says it comes with runflat as standard but I don't see they are.

Regards

jim04clk

Should be runflat. If it’s a c43. You can write down information of tire and check tire rack website. That will answer all your question.

EdC43AMG

that's my surprise, looking at the data it do not seems to be runflat.

255/35 ZR19 MO 96Y XL Dunlop sport maxx RT
225/40 ZR19 MO 93Y XL same brand.

code in the VIN, 56V Speed/Load Index 93Y XL+96Y XL
R01 Summer Tyres

and comes with Tirefit... I have the feeling mine do not come with runflat, and I am really glad with it if so

regards

JonWu

So I have the 2019 C43 with the 19” factory runflats, Pirelli’s. I don’t know how it feels with non-runflats but I haven’t felt like the ride or traction is bad for whatever reason. Now my wife drives a 2020 GLC with 18” run flats and the ride is a lot smoother, but that is prolly due to the GLC suspension since she’s got run flats as well. Could someone with a 2019 tell
me what the objective difference in ride is?

MrBane

MOE is the Mercedes "recommended tire" that will almost always come as a runflat whether its Dunlop or Pirelli.

XL tires also come as runflats depending on the size and manufacturer.

EdC43AMG

thanks. Yes, the MOE are runflats.

but XL are just extra load. I used plenty of times in my Saab, with no issues and they always where better than standard ones as it's a stronger sidewall allows lower "floating" feeling in the car. But being XL and MO, if they are runflat it should have the label of runflat, but I don't see anything of that.

but well. I will cross fingers.

regards

speedlaw

runflats are so the OEM can save a few pounds and a few dollars in spare and jack. They really aren't for YOU.

Imagine a marathon runner, tuned to perfection, forced to run the 26 or so miles in fresh, non broken in Doc Martens.

F run flats. I've 21k on my 2019 and for the first time an actually happy to spend money on new tires for my Daily.

netboy

runflat or nothing.

imagine you have a flat at 2am on dark road, I'm sure it really fun waiting for tow truck for over a hour on a dark road.

RichardCranium3

That’s why most switching to non-RF are adding a patch or slime kit and an AC air pump.

brakingbad

If my car has a flat on a dark road at 2am, it's the car thief that has a problem, not me.

speedlaw

Not a huge problem, and there is room for that stuff in the not-a-spare storage area. I already have a car powered tire pump.

Most flats nowadays not related to inflexible sidewalls that split or the rims the eat the forces the tires should have, are the dreaded slow leak from a sheetrock screw left in the roadway. This only becomes a problem for those who ignore things. I just left a race weekend where street tires are required and they were tortured for hours on a variety of cars. A sudden blowout is very, very rare both in the unmaintained 'what's a tire?' world and the "do anything to shave seconds from the lap time" world.

The usual pattern is pick up puncture. Slow leak. Drive on slow leak. Lots of people will do this until failure, but I'd say that everyone *here* would at the least pay attention to the warnings that come up on screen in these cars so what might occur in a less technical car is less likely here, and only with willful ignorance.

Oh, and you can repair the Contis. When I got that screw it was in the middle of the treads, it was fixed with the usual tire patch tool, and has held no issues.

RichardCranium3

A common misconception worth driving home - you absolutely CAN patch runflats. The rules are no different than conventional tires. Dealers will, more often than not, do everything they can to sell you a new set of tires rather than patching. It's the service departments job to generate income, and they are rarely your friends.

speedlaw

I did research it. Michelin says one repair is OK, Conti says no repairs with a credit based on tread depth. Mine are worn to wear bars at the usual inside edges of the front so it's off to a set of Conti DWS 06 or Mich A/S 3....and a bottle of fixaflat.

alexasa

iTrader: (1)

literally have never been caught with a flat.

you either have a blow out (in which case you are in the same situation with either tire) or you are negligent with maintenance and ignore TPMS.