Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 01-16-2011, 02:24 AM   #1
Registered User
 
Join Date: Jan 2011
Location: Southampton UK
Posts: 3
Exclamation Help Needed With What Offsets I Can Put On My Boxster

HI Everyone,


I am trying to upgrade my wheels on my 2002 boxster, but am very confused with all these offsets going round. I have been offered the following set of wheels but will they fit straight on or do i need spacers and what size spacers.... please help

The wheels i want to fit are turbo twist 2's i think with the offsets and dimentions below:

Fronts: Part number 993 362 134 06 / 7.5J x 18 ET50 offset, fitted with Continental Sportcontact 2 N2 tyres - 225/40 ZR18

Rears: Part number 993 362 140 84 / 10J x 18 ET65 offset, fitted with Continental Sportcontact 2 N2 tyres - 265/35 ZR18

Has anyone already put theses on their Boxster

Many thanks

Dylan

d4lan is offline   Reply With Quote
Old 01-16-2011, 04:04 AM   #2
Registered User
 
husker boxster's Avatar
 
Join Date: Sep 2006
Location: Omaha
Posts: 2,312
Welcome to the forum.

The fronts will work. Rear offset on a 986 is somewhere between 44-47 depending on the wheel. So you'll need approx a 20mm spacer. That's on the very outer edge of acceptability. And you'd need to purchase lengthed lug bolts.

Help is at your fingertips, my friend. If you search on et65, you'll find plenty of threads on this topic.
__________________
PCA National HPDE Instructor
2008 Boxster S Limited Edition #005
2008 Cayman S Sport - Signal Green
1987 928 S4 - Granite Green Metallic (Felsengrun)
husker boxster is offline   Reply With Quote
Old 01-16-2011, 04:10 AM   #3
Registered User
 
Join Date: Jan 2011
Location: Southampton UK
Posts: 3
thanks husker..... will a 15mm spacer do the job?

sorry to sound a bit thick but what do you mean by outer edge?

new to all this
d4lan is offline   Reply With Quote
Old 01-16-2011, 05:13 AM   #4
Registered User
 
Join Date: Nov 2007
Location: Chicago suburbs
Posts: 1,675
The inside of the wheel will likely rub with just a 15mm spacer. I have 10s on the rear of my Box with et47 and it's quite tight on the inside (you will need to tie back the e-brake cables, or they'll rub).

By "outer edge", he means the limit of acceptability.
__________________
JGM
2002 Boxster S
1973 911 Green FrankenMeanie
PCA DE Instructor circa '95
jmatta is offline   Reply With Quote
Old 01-16-2011, 07:37 AM   #5
Registered User
 
Join Date: Jan 2011
Location: Southampton UK
Posts: 3
Exclamation

does anyone actually have et65 on the rears....if so what spacers are on...also do they come out of the arch?
d4lan is offline   Reply With Quote
Old 01-16-2011, 12:05 PM   #6
Registered User
 
Johnny Danger's Avatar
 
Join Date: Nov 2008
Location: Massachusetts
Posts: 4,810
Garage
Quote:
Originally Posted by d4lan
does anyone actually have et65 on the rears....if so what spacers are on...also do they come out of the arch?

A 10 inch wheel with a +65 offset is extremely high for a 986 boxster. Just to put things in perspective, the last three wheel sets that I had on my vehicle had the following fitments : 19x10 +40 , +36 and currently +31 . I've found that the ideal offset for a 10 inch rear wheel for a 986 falls between +40 to 45 . A more aggressive fitment can involve offsets as low as +35 to 40. In addition, if you ever decide to go the route of adjustable coilovers, to start, you are going to need a low offset of around +40 in order to clear the adjustable perch. So, with all of that said, a +65 offset is sub-optimal for your vehicle. And, as Jmatta indicated, you are going to need at least a 20mm spacer
__________________
Don't worry I've got the microfilm.
Johnny Danger is offline   Reply With Quote
Old 01-16-2011, 01:42 PM   #7
Registered User
 
husker boxster's Avatar
 
Join Date: Sep 2006
Location: Omaha
Posts: 2,312
What I should have said is a 986 rear should be in the 44-47 range, so if you want to use a 65, you'll need to use a 20mm spacer to get into that range (65-20=45). Using a 15mm spacer wouldn't get you into that range.

Below is an offset calculator. You can use it to determine how a potential wheel will fit on your Box. To determine what you currently have, go check the rear wheel on your Box at the valve stem. It will have the wheel width (the value with the J) and the offset. This is your starting point. Plug in the new wheel dimmenstions and the calculator will tell you how far in or out the new wheel will be. You can then measure and see how well that works.


http://www.1010tires.com/WheelOffsetCalculator.asp

Do two things before you purchase any wheel: (1) check the offset calculator and (2) search the forum for information - there's tons of it here. Once again, if you search on et65, you'll find many threads about these wheels. You're not the first to ask. 20mm spacers will work but there are compromises that have to be factored into the decision. Some are willing to accept these compromises, some aren't.

DON'T buy anything until you're sure it's right for you. Porsche wheels are expensive and no one likes to make an expensive mistake. Many sellers say their wheels will work on a Boxster, but only if you use very thick spaces. Be a wise consumer.

__________________
PCA National HPDE Instructor
2008 Boxster S Limited Edition #005
2008 Cayman S Sport - Signal Green
1987 928 S4 - Granite Green Metallic (Felsengrun)
husker boxster is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 03:47 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page