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

Reply
 
LinkBack Thread Tools Display Modes
Old 07-23-2011, 07:59 PM   #1
Registered User
 
DenverSteve's Avatar
 
Join Date: Jul 2011
Location: Denver/Winter Park, CO USA
Posts: 600
Wheel Size

This may be basic (but I've never read my wheels before). On my front OEM wheels, on either side of the valve stem, the front say 7 55 and the rear say 8.5 50. I'm sure the 7 and 8.5 are the wheel width but what do the 50 & 55 indicate?

__________________
Denver Steve
Carrera, Cabriolet, 6-Speed, Black/Tan

Last edited by DenverSteve; 07-23-2011 at 08:04 PM.
DenverSteve is offline   Reply With Quote
Old 07-23-2011, 08:15 PM   #2
Autobahn Glanz
 
WhipE350's Avatar
 
Join Date: Dec 2010
Location: Charlotte, NC
Posts: 1,282
Garage
Rim Offset. Here is an excellent link: http://www.1010tires.com/WheelOffsetCalculator.asp
WhipE350 is offline   Reply With Quote
Old 07-23-2011, 08:34 PM   #3
Registered User
 
DenverSteve's Avatar
 
Join Date: Jul 2011
Location: Denver/Winter Park, CO USA
Posts: 600
Thanks. I never read my Cayenne wheels. It's obviously different when the front and rear wheels are different.
__________________
Denver Steve
Carrera, Cabriolet, 6-Speed, Black/Tan
DenverSteve is offline   Reply With Quote
Old 07-24-2011, 07:55 AM   #4
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,665
You'll commonly see the German abbreviation for offset, ET or et. The diameter and width of a wheel are in inches while the offset is in millimeters. For example, 18x8.5 et 45 is a 18" diameter, 8.5" wide wheel with 45mm offset.

__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
thstone 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 06:22 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, 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