Going bigger tires.. well kind of
Thread Starter
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Joined: Jul 2009
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1987 300E, 1995 C280
Going bigger tires.. well kind of
So right now in the rear for my 87 300e, im running 225/50/16.. if i go 225/55/16 will i have issues? car is stock height, fenders are not rolled.
Member
Joined: Aug 2007
Posts: 197
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From: Long Island, NY
'03 C320 Sedan, '04 SAAB 9-3 Cabrio
I doubt the slight diff in profile would cause rubbing, however you would be throwing the speedo off. Check the tire size calculator at 1010tires.com for a good answer.
Thread Starter
Senior Member
Joined: Jul 2009
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1987 300E, 1995 C280
I'm .3 mph too fast with the 225/50/16's.. with the 225/55/16's it says
"Speedometer Difference: 3.044% too slow" "Diameter Difference: 2.96%"
but with the 50's Speedometer Difference: 0.528% too fast Diameter Difference: 0.53% .3mph isn't huge..
but 2.8mph might be a huge difference..?
"Speedometer Difference: 3.044% too slow" "Diameter Difference: 2.96%"
but with the 50's Speedometer Difference: 0.528% too fast Diameter Difference: 0.53% .3mph isn't huge..
but 2.8mph might be a huge difference..?
Last edited by funkgab; May 4, 2010 at 12:00 AM.
Member
Joined: Aug 2007
Posts: 197
Likes: 1
From: Long Island, NY
'03 C320 Sedan, '04 SAAB 9-3 Cabrio
Well the rule of thumb is no more than 3% different diameter. Why do you want 55's? If the only problem is the speedo it doesn't really seem to matter, but you will get better mileage!
Member
Joined: Aug 2007
Posts: 197
Likes: 1
From: Long Island, NY
'03 C320 Sedan, '04 SAAB 9-3 Cabrio
Bigger diameter = fewer revs per mile = less gas used. And it would fill in the fender gap some as well. Unless you recalibrate the speedo your numbers will not reflect any difference in mileage but you will actually be going farther than the odometer indicates
Thread Starter
Senior Member
Joined: Jul 2009
Posts: 330
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1987 300E, 1995 C280
I don't know if they will fit.. but there are no other losses besides your speedometer being effected by going bigger tires? i mean its the rear only so its not like i'm turning or anything..
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