Hey guys,

Just wondering if a 235 tire would fit the front of a 2010 C300 Sport. Tire shop keeps telling me that it won't fit. Does anyone run on this size for the front? Thanks guys!

Matthew

I have 235s on 18 X 8 with a 45 offset and everything is fine.

Standard issue on C63 - 235/40/18 with 45 offset

Hey Matt,

I run 235-40/18s on the front without rubbing. You need to make your wheels are the right fit.

What about 18X8.5 wheels (+45) with a 235/40/18 all around/square?

I've just gotten into reading about spacers. I don't wan't to go staggered for a few reasons (the tire I want doesn't come in 225/40/18, 255/35/18 OR even 265/35/18).

Can I use 10mm spacers on JUST the rear tires to get a visual flushness with the rear fender well to match the front? Is it dangerous to not have the front and back tires centerline's the same distance?

I think you would be purposely creating a toe-in situation, maybe bad for handling or tread wear, but I don't really know this stuff.

I have 245/40/18 up front on my C250 and have no rubbing or handling issues. Shop checked it out and said mine looked fine too.

Use a wheel clearance calculator like this one to help yourself figure the proper fitment for your vehicle. http://www.rimsntires.com/specs.jsp

Use a wheel clearance calculator like this one http://www.rimsntires.com/specs.jsp to help yourself get a good understanding for which fitment will work best for you. You can play around and plug in different offsets and dimensions to see what works best.

I run 235/40 18"s with a 45 offset and the car rides and handles very well. The fronts are flush with the top of the fender arch and the rears are very slightly tucked. There is not a danger or toe in issue with this set up but a 5mm or 10mm spacer on the rears would put you flush with the fender top.
I love the square setup as the car has sharper turn in and (when you chose to switch off traction control) can break the rear loose easier to help rotate the car in a turn.

I realize that a square setup without spacers would not induce toe in, but would spacers on just the rears create toe in? Sorry, but I couldn't tell from your response when you said there is not a danger (whether you were referring to before or after the spacer scenario). Thanks

The "no danger" part was in reference to your concern about the front/back centerlines not being perfectly aligned. Of course, if you move your total offset in or out a large amount from where it was designed to be, the suspension geometry will start to get a little screwy.
I don't believe spacers affect toe in at all...if there are any alignment pros out there, please correct me if I'm wrong.
If I had 5 or 10 mm spacers laying around, I would probably pop them on and see how it looks but it doesn't bother me, so I haven't gone out and bought a set.

Gotcha. I figured toe in was when the tires were slightly pointed in toward each other, which makes perfect sense, but I remember also reading somewhere that a larger rear tire/wheel base is considered toe in as well. I just googled toe in, and it's only showing info on tires pointing toward each other, so everything should be fine. Not sure were I read that other thing about larger rear distance

The most important thing you have to watch with W203 & W204 is clearance to the strut dimple. This is usually the restricting factor to max 235 up front without spacers. Some aftermarket struts will allow a 245 up front but it's tight.

One last question for ya...What do you think about getting power wheels pro (818 18X8.5, 45 offset), all around, with bridgstone serenity plus tires 235/40/18 all around (regardless of look of back tires, being non staggered, which could be addressed later with spacers).

I'm obviously looking for the smoothest quietest ride on 18" wheels. These tires seem to never be mentioned around here (even in the "What is the quietest tire for 18" thread!), and it might have to do with the fact that they aren't offered in the native 225 OR 255 tire size that's currently on our 18" wheels with the continentals.

Not looking for ***** out performance, just a smooth ride that still handles well, and doesn't feel like a boat/mattress

Continental Sport Contacts are noisy on this Chassis & Michelin PS2's & some Yokohamas & Bridgestones are the quietest.

No tyres with big blocks. Radial bands of tread with small sipes work best.