jonpom

My searches for All Season tires for my GLC43 Coupe come up empty. OTOH, there are many All Seasons available for GLC63. Given my 43 has staggered 21” wheels 8.5” / 9.5” rims, is there any reason NOT to consider tires spec’d for 63?

larrysing

All that matters is the size and if it will fit without rubbing.

Consider ALL tires that fit the car and your budget.

jonpom

I guess what I’m really asking is if others have used GLC63 spec’d 265/40 & 295/35 x 21 tires vs GLC43’s 255/40 & 285/35 x 21 w/o adverse effect, rubbing etc, on GLC43 with 8.5/9.5 x 21” rims.

larrysing

I think this thread has your anwers:

https://mbworld.org/forums/glc63s-gl...?highlight=295

dantm2000

I think the question was the tires rather than wheels? I'm about to pull the trigger on 265/40-21 and 295/35-21 for my GLC43 wheel setup since I can't find all-season tires in the standard stock configuration. I thought there had been some threads in here that this works quite well?

larrysing

Yes - but if the wheels will fit, the tires will fit.

dantm2000

Not necessarily - the GLC63 appear to have wider wheels? So as a package they may fit but installing the wider tire from the GLC63 to the narrower wheel from the GLC43 may not work? Or what's your logic..

larrysing

OK, I'll get back to specific information, rather than the "Here is a book on fishing - go teach yourself to fish" response from earlier.

OP: Are these your OEM tire sizes?

255/40ZR21 102Y. 8.5Jx21 ET40
285/35ZR21 105Y 9.5Jx21 ET22

If that is the case, then you are limited by your RIM size.
Let's confirm that first. Standing by...

dantm2000

@larrysing I have the same vehicle as the OP and yes those are the tire sizes. And yes I think the max tire size for a 8.5" width rim is 255 so the original setup on the GLC43 appears to be already at the max. But when searching around there are tons of setups for 8.5 wheels where the owners increased the tire size to 265 with no issues?

larrysing

Yes, you can find many instances of people going "oversize" in relation to tire to wheel ratios.

How that affects the drivability and longevity of the tire, and how the cars react to it, is more of a case-by-case situation.

whartonsprinter

Like may of you, I was looking for AS tires for my GLC43 with 21" rims. The summer Conti's didn't do it - hydroplaning, crabbing and I was concerned about their utility in winter.

I found that 265/40/21 and 295/35/21 works with no rubbing. I purchased Continental EXTREME CONTACT DWS06 PLUS and am thrilled. 50k warranty, good ratings in snow, no crabbing, no rubbing, MUCH quieter and MUCH MUCH smoother ride. I admit that I don't track, I'm a fairly conservative driver and that I don't push the 43 the way many of you do but if you're looking for an A/S tire, I give these, and the size (up) a positive rating.

dantm2000

Thanks just ordered the Pirelli Scorpion Zeros in the same size, looking forward to it.

peter_mb

Do you have any pictures of your GLC with this setup? I was thinking about getting these exact tires but wanted to see how far the larger tires stick out! Thanks!

mr inkredibul

I have GLC 63s forfged 21s on my GLC43 and GLC63 sized all-season Pirellis installed with no issues.

The REAL issue is the OEM wheel size of the GLC43 I believe may be too thin to run the GLC63 tires