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Discussion Starter #1
i had no idea the 35 ratio would look this huge so now im starting to have major doubts about the look, especially since im wanting to lower it.
i put the tires up for sale few days after i received these. but ye so......
anybody have pics of this type of setup on their s5? (preferably b8.5)
285 35 20
20x11 et30


177329
177330
 

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Yeah, as the width is 285 too! The sidewall is a percentage of the width.

OEM tyres are 265 30 R20, so yours are quite a bit over with width and sidewall. This will over-read on the speedo too.

Use this calculator to get the % difference between OEM and your wheel the same or near enough.

You do need a 30 sidewall to get back close to the OEM tyre ratios. :)
 

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Stock on the S5 is 255/35/19.....it will under read. Your speedometer and odometer will read less than actual. In this case a good bit off. When you are reading 70 mph, you are going 75.
 

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What the other guys said, that tire is "over-tired" on that wheel, IMO it won't look right on the car. But minor details compared to the more serious note of the tire size being too far off the OEM recommendations.

Regards
 

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Yeah, as the width is 285 too! The sidewall is a percentage of the width.

OEM tyres are 265 30 R20, so yours are quite a bit over with width and sidewall. This will over-read on the speedo too.

Use this calculator to get the % difference between OEM and your wheel the same or near enough.

You do need a 30 sidewall to get back close to the OEM tyre ratios. :)
Exactly as dave has stated ,and not to sure why you have these tyres fitted.:unsure:
I have thought about upgrading to 20's from the 255/35/19 rotors I have on my S5.
The normal upgrade tyre size would be 265/30/20 ,however the RS5 's have 275 /30/20
So not to sure why you would have 285/35 on the car
 

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It's because the 20" wheel the OP has is 11 inches wide. The 20s in the OEM wheels are 10 inch I believe using 265/275 tyres, so the tyre width is correct in this case, just not the sidewall.
 

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It's because the 20" wheel the OP has is 11 inches wide. The 20s in the OEM wheels are 10 inch I believe using 265/275 tyres, so the tyre width is correct in this case, just not the sidewall.
I have Michelin Pilot Sport 4S: 275 35 20's on ET35 10J's (no more spacers) and have it lowered on H&R OE Sports Springs (1BE S-line sports suspension- not sure if that means anything after you have changed the springs)- I first upgraded from stock 255 35 19's to 20's & kept the sidewall at 35 because it was hitting the speed bumps after lowering when still on the 19's and also because it was really hard-ass in the seat.. so now with the 20's & addition of a set of rubber coiled 'spring-assistors' fitted inside the springs this has restored the comfort again and also never grounds on speed bumps- having said that, it's absolutely right on the clearance limit is it touches the arches occasionally on cornering when on bumpy rough tracks. The speedo is only 2mph off when at 30- but I go by Waze for speed accuracy anyway.
However, I may go over to try 275 30 20 next time around, as hopefully the comfort won't be compromised too much by losing the extra 5 of air on the sides and this would probably remove any possibility of touching and visually should look fine, as there is no gap at all atm- as you can see here.
 

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Discussion Starter #9
i totally forgot about this post but since then i bought 285 30s now, thanks to everybody! appreciate it
 

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OK, sounds good- so we would like to know do they ever touch the wheel arch lining on bumpy tracks or steeped roundabouts when you are carrying a full load for example?- any photos showing how its sits would also be much appreciated, please! (y)
 
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