RE71R 18" rear tire size for Cayman

Porsche Technical related discussions.

RE71R 18" rear tire size for Cayman

Postby terryb on Wed Mar 15, 2017 10:11 pm

I'd like to put RE71Rs on my 2010 Cayman S. The 18" wheels currently have 235/40 and 265/40 which are the stock, factory sizes. The RE71Rs come in the front size but no 265/40, only 265/35 or 265/45. I'm leaning toward the 265/35s. I know these will throw off the speedometer a bit. Anything else I should take into consideration? Will the nannies or PDK get confused by the unexpected rotational speed?

Thanks,
-Terry
Terry Barnum
'88 911
'10 Cayman S
terryb
Member
 
Posts: 42
Joined: Thu Jan 04, 2007 1:59 pm
Location: Oceanside

Re: RE71R 18" rear tire size for Cayman

Postby ttweed on Thu Mar 16, 2017 6:54 am

If you've got 20 points to spare, or don't care about your classing, I'd run the 255/35-18 on the front and 275/35-18 on the rear, Terry. That worked really well on my Cayman S when I had it.

YMMV,
TT
Tom Tweed -- #908
2015 GT3
SDR Tech Inspection Chair 2005-06
SDR Forum Admin 2010-
Driving Porsches since 1964
User avatar
ttweed
Pro Racer
 
Posts: 1736
Joined: Fri Jul 02, 2004 7:13 am
Location: La Jolla, CA

Re: RE71R 18" rear tire size for Cayman

Postby john kinkaid on Thu Mar 16, 2017 7:32 am

HI Terry,

Last year I ran the 245/40-18 and 275/35-18 combo without any issues. Glad to see the Cayman on track, save that nice Carrera!

John
john kinkaid
Member
 
Posts: 20
Joined: Mon Aug 01, 2005 2:28 pm

Re: RE71R 18" rear tire size for Cayman

Postby terryb on Thu Mar 16, 2017 10:08 pm

Thanks for the replies Tom and John. I don't want to go crazy on points and since it doesn't sound like going from 40% to 35% tire height on just the rears will cause any nanny problems, II think I'll stick with stock widths at first and learn to drive the car.

Thanks,
-Terry
Terry Barnum
'88 911
'10 Cayman S
terryb
Member
 
Posts: 42
Joined: Thu Jan 04, 2007 1:59 pm
Location: Oceanside

Re: RE71R 18" rear tire size for Cayman

Postby terryb on Wed Mar 22, 2017 3:17 pm

So where did you guys get your RE71Rs mounted? I asked my Discount Tire and they won't put a 275/35/18 on the rear because the stock load rating is 101 and this tire is only 95.
Terry Barnum
'88 911
'10 Cayman S
terryb
Member
 
Posts: 42
Joined: Thu Jan 04, 2007 1:59 pm
Location: Oceanside

Re: RE71R 18" rear tire size for Cayman

Postby john kinkaid on Thu Mar 23, 2017 5:40 am

Hi Terry,

I do all my tire shopping at Tire Dynamics, 4585 30th St, San Diego, CA 92116 Phone: (619) 280-9500. Ask for Ray, he can normally get any tire within a few dollars of Tire Rack pricing.

John
john kinkaid
Member
 
Posts: 20
Joined: Mon Aug 01, 2005 2:28 pm

Re: RE71R 18" rear tire size for Cayman

Postby ChuckS on Thu Mar 23, 2017 11:05 am

Terry,
A lot of us get our tires mounted at:

Bear's Tires
7023 Carroll Rd - Unit A
San Diego, CA 92121
858-453-2999

They are not too far from Mirage International
They don't care if you bought them there or not. A lot of PCA, POC, SCCA and NASA drivers go there.

Chuck
Chuck Sharp
1988 911 Carrera 3.2 Targa C.E.
1988 944 Turbo S
1986 944 Spec
and Several X Cars
User avatar
ChuckS
Time Trialer
 
Posts: 450
Joined: Tue Apr 03, 2007 4:03 pm
Location: Rancho Bernardo

Re: RE71R 18" rear tire size for Cayman

Postby terryb on Thu Mar 23, 2017 11:37 am

Thank you John and Chuck. I've been to Bear's once to mount 225s on the 911's 9" wheels, which Discount wouldn't do. They were quick and pleasant but a little far from me in Oceanside. Know of a Bear's equivalent in North County?
Terry Barnum
'88 911
'10 Cayman S
terryb
Member
 
Posts: 42
Joined: Thu Jan 04, 2007 1:59 pm
Location: Oceanside


Return to Technical

Who is online

Users browsing this forum: Bing [Bot] and 1 guest