Changed tyres and wheels rubbing- why?

[LewisTintin]

Hi Chaps,

I've had a cayman with 19inch wheels on for 3 years. I lowered the car (techart) about 2 years ago, and have gone through 3 sets of rear tyres with no issues.

I put some continental tyres on today (opposed to P Zero's which are normally on the car), and its started catching on the wheel arch's very badly.

Why would this be? The tyres are the same width and profile as the Zero's. Could they be fitted badly?

[vincenz]

Have they got the rim protectors on them?

[LewisTintin]

Umm,

That could be a possibility, thanks for that. I'll have to have a look shortly.
Could I even get a refund? They were literally fitted this am.

[flemke]

LewisTintin said:

Hi Chaps,

I've had a cayman with 19inch wheels on for 3 years. I lowered the car (techart) about 2 years ago, and have gone through 3 sets of rear tyres with no issues.

I put some continental tyres on today (opposed to P Zero's which are normally on the car), and its started catching on the wheel arch's very badly.

Why would this be? The tyres are the same width and profile as the Zero's. Could they be fitted badly?

You say that they are the same "profile", but what you mean (I think) is that the aspect ratio is the same. That is different from the profile.
Every manufacturer has its own "profiles", which vary from model to model within its range. Some will have a squarer corner, others a more bulging sidewall.
Also, 255 (or whatever) is not the same to them all. There can be as much as a 10mm range in the actual tread width, as they measure from different points depending on the corner shape and also on the tread pattern.

[TheRoadWarrior]

flemke said:

LewisTintin said:

Hi Chaps,

I've had a cayman with 19inch wheels on for 3 years. I lowered the car (techart) about 2 years ago, and have gone through 3 sets of rear tyres with no issues.

I put some continental tyres on today (opposed to P Zero's which are normally on the car), and its started catching on the wheel arch's very badly.

Why would this be? The tyres are the same width and profile as the Zero's. Could they be fitted badly?

You say that they are the same "profile", but what you mean (I think) is that the aspect ratio is the same. That is different from the profile.
Every manufacturer has its own "profiles", which vary from model to model within its range. Some will have a squarer corner, others a more bulging sidewall.
Also, 255 (or whatever) is not the same to them all. There can be as much as a 10mm range in the actual tread width, as they measure from different points depending on the corner shape and also on the tread pattern.

Indeed, case in point; the 205/40/17 toyo R888 is actually 215mm wide