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Car Forum / Mercedes-Benz Cars / March 200817" wheels?
I just put a set of AMG staggered 17" wheels on my '92 300D. Some how it just doesn't feel right and the outer edges of the front tires are wearing fast almost as though it developed a lot of positive camber. should I expect better? JD If by "staggered" you mean offset then I suspect the pivot point of the old wheel & tire combination is not in the center of the new wheel & tire tread. A hypothetical line projected through the upper and lower ball joints down to the ground marks the pivot point on the ground. To have it be in the center of the tire's tread depends on a specified wheel offset, wheel diameter and tire height etc. I suspect your new wheels make the new tires pivot somewhere off the designed pivot point. I'd first check the toe-in or toe-out as the case may be for that, if incorrect, can wear the edge of a tire. Center the steering wheel and roll the car to a stop using the parking brake. For a quick and dirty check just sight down the outer edge of each front tire (at its mid height) to its rear wheel. You may find that one, or both, don't achieve this crude alignment check. If that's so have a professional adjust the car's toe-in, or the whole front suspension.  Signature© 2008 T.G.Lambach. Publication in any form requires prior written permission. > If by "staggered" you mean offset then I suspect the pivot point of the > old wheel & tire combination is not in the center of the new wheel & [quoted text clipped - 13 lines] > this crude alignment check. If that's so have a professional adjust the > car's toe-in, or the whole front suspension. By "staggered" I mean 17" x 8 1/2" ET30 in the rear and 17" x 7 1/2" ET37 in the front. The stock ET is 49 on the 6 1/2" wheel. If I understand the offset thing correctly, the difference in the ET corresponds to half the difference in the width of the wheel and I *should* be OK. JD > I just put a set of AMG staggered 17" wheels on my '92 300D. Some how it > just doesn't feel right and the outer edges of the front tires are wearing > fast almost as though it developed a lot of positive camber. should I > expect better? Did you get it aligned? -tom! -- >> I just put a set of AMG staggered 17" wheels on my '92 300D. Some how it >> just doesn't feel right and the outer edges of the front tires are wearing [quoted text clipped - 4 lines] > > -tom! That's on the agenda for tomorrow but as it was never an issue with the stock wheels I'm unsure of why it becomes an issue with the 17's. JD > > Did you get it aligned? > > That's on the agenda for tomorrow but as it was never an issue with the > stock wheels I'm unsure of why it becomes an issue with the 17's. The wheels and tires are an integral part of the car's suspension. Changing them changes the interactions that take place between the road and the car's frame. Glad the alignment helped. ;) -tom! -- You need to get it aligned at the shop with your new wheels. JD schrieb: > I just put a set of AMG staggered 17" wheels on my '92 300D. Some how it > just doesn't feel right and the outer edges of the front tires are > wearing fast almost as though it developed a lot of positive camber. > should I expect better? You should have a look on the list of allowed wheels for your car. Probably you need a fender broadening and rims are produced with different wheel offsets for different cars. As far as I see the W124 300D is not made for 17" http://www.mercedes-benz.de/content/media_library/germany/mpc_germany/de/mercede s-benz_deutschland/personenwagen/home/produkte/zubehoer/reifen_und_felgen/radrei fen_kombinationen/e-klasse/e_class_124_saloon.object-Single-MEDIA.download.tmp/E _Klasse_Limousine_Typ_124.pdf According to the data sheet the 300D maximum is 16" with axle and fender corrections. SignatureRoland Franzius It doesn't matter what size wheel you got... as long as it is the proper offset and total diameter. Meaning right wheel and right size tire. European Union and GB has different set of rules on what is allowed on cars for insurance purpose. Not in US. > It doesn't matter what size wheel you got... as long as it is the proper > offset and total diameter. Meaning right wheel and right size tire. > > European Union and GB has different set of rules on what is allowed on cars > for insurance purpose. Not in US. My rolling diameters are good. My offsets should change by half the increase in wheel width, correct? If so I'm in good shape. Thanks JD Your rear tire of 17" x 8.5" ET30 is too small. It should be at around ET35. The front is fine... 17" x 7.5" ET37 is perfect. Who sold you the wheels? New or used? I got the wheels used on Ebay. Are you sure about the ET30 being to small? If it's a matter of keeping the tire centered, a 2" (50mm)increase in wheel width should translate to 25mm decrease in offset, right? JD > Your rear tire of 17" x 8.5" ET30 is too small. It should be at around ET35. > The front is fine... 17" x 7.5" ET37 is perfect. > > Who sold you the wheels? New or used? Go to tires.com and go look up the wheels for your car. Pay attention to the width and the offset related to them. You can also call up AMG and ask them directly. > Go to tires.com and go look up the wheels for your car. Pay attention to the > width and the offset related to them. > > You can also call up AMG and ask them directly. Thanks! JD Just had it aligned today and the difference was dramatic; MUCH better. It didn't pull before but was eating front tires. It didn't feel bad before but is much more surefooted now. My indy MB guy also assured me that the 8 1/2" x 17" ET30 is correct for that width in the rear. JD >> Go to tires.com and go look up the wheels for your car. Pay attention >> to the width and the offset related to them. [quoted text clipped - 4 lines] > > JD That's good then... alignment should solve the problem. |
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