that I have had for some 2 1/2 years. Looking in the boot the other day i saw that the spare wheel is a 16" wheel but the car is on 17". Anybody Know if it would still fit. I see the Manual says that 16" is optional for Summer driving.
saxman99,
Aug 14, 2:57pm
Should be fine, so long as the stud pattern is the same.
tamarillo,
Aug 14, 3:09pm
Only problem will be if rolling circumference is really different. Usually when bigger wheels are swapped out the tyre profile is lower ending up in very much same place. 16 to 17 ain't a lot. Record the tyre sizes and compare them to see if it's a big difference http://tire-size-conversion.com/tyre-size-calculator/
countrypete,
Aug 14, 3:13pm
Correct me if I'm wrong but if two tyres with different rolling circumferences were put on the rear axle, would that not put strain on the LSD? Terminally?
tamarillo,
Aug 14, 3:24pm
I reckon you're right, but like you stand to be corrected. I'm hoping small difference would be okay for short distance. I'd guess it's better only used on front?
lookoutas,
Aug 14, 3:36pm
Depends what year the Merc Coupe is. Or whether it's a real Merc Coupe or one of them Euro Merc's
I have a humble Ford Falcon that is the same. 16" road wheels with 215/65 tyres, 15" spare with a 205/70 tyre.
At least you don't have a space saver.
networkguy,
Aug 14, 4:38pm
Me too, I assumed Mercedes SLK. Regarding strain on the LSD, if its a modern Merc it will quickly tell you if one wheel has a different circumference, this is how it detects flat tyres (unless it has TPMS). It thankfully hasn't happened to me yet, but I think the display will constantly alert you to the problem and it may even go into limp home mode and limit your speed.
lookoutas,
Aug 15, 4:20pm
So what is it OP?
neville48,
Oct 2, 4:14am
Unless its a real Merc Coupe from the forties it will have 15" wheels.
Since the public registrations are closed, you must have an invite from a current member to be able to register and post in this thread.
Have an account? Login here.