Hi guys,
I'm thinking of upgrading to the lighter OEM
Cayman
R /
Spyder
19" rims which are 8.5J / 10J.
I think the
Cayman
R was sold on the 235 / 265
Michelin PS2
N2 tyres, and certainly that's what my
Cayman S
has always used - on 19" SportDesign rims (8J/9.5J).
Would the new
Spyder
8.5J / 10J rims give me an opportunity to "upgrade" to a wider 245/275 set of tyres? Is there any real benefit to wider
tires
here, or should I stay 235/265 if this is what the
Cayman
R was developed on?
Cheers, Jon
You can go to the wider
tires
without any problem. And there is definitely better traction with more contact patch. By going one size up on each axle, you are keeping the proportions appropriate. And the upgrade you are making is very common.
Thanks
@PorscheGreg
, that sounds very encouraging then!
I'd of course install with the right offsets / spacers, but do you happen to know if the additional width will kick up an unreasonable amount of crud from the road? Perhaps I should also get the doors PPF'd?
It’s only going to be incrementally more. Consider that the extra width is spread between both sides of the wheel. If the wheel offsets are right for the car, you shouldn’t need any spacers to make it work. Of course, spacers would push the wheels out and perhaps cause a bit more debris on the fenders. But some folks like the stance that spacers give the car.
That's a good point - thanks! I guess so long as the spacers are correct it'll be fine. I might test different spacers since I love that stance, but I'll keep it simple for a start. Planning to drop the stock (non
PASM
) suspension with some coilovers at some point too. Definitely -10mm, possibly -20mm if the numerous road humps allow...
I use 18 mm and 23 mm spacers on oem wheels that have offsets of 57 f and 43 r, that do exactly what you are talking about. But it does collect more water on the side panels if you run through a water fall over the road. I will include a picture of my
Cayman
with Forged Titan 7 TS5's. Their offset is 47 f and 35 r with width of 9 in f and 10 in r,. A little track residue on the rear fenders from the Hoosier slicks.
Those are both beautiful setups - I can't wait to drop mine from stock height!
Hi guys,
Just to follow up on a specific bit: should I aim for
F: 245/35
R: 275/35
… or would that create too much sidewall?
Should I perhaps aim for
F: 245/30
R:275/30
Any ideas?
Many thanks!
Aha, after stumbling around in the dark, I found two calculators which seem helpful
1.
265/35 R19 vs 275/35 R19 Tire Size Comparison Table with Graphic Visualization
2.
Alloy Wheel & Tyre Fitment Calculator. Offset, Tyre Stretch and Speedo Error | Will They Fit
According to both sites, ignoring rim width, 275/35/19 should have a very similar diameter to 265/35/19 (+7mm, +1%)
According to the 2nd site (which includes rim width) the change 9.5J -> 10J makes no difference to the circumference, and the sidewall is just a little more angled back from rim to tyre edge
19 inch wheels on 35 sidewalls work very well in 245/35/19 f and 275/35/19 R.
