Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Spare Tire...

creekman
 Share

Recommended Posts

creekman Member

creekman

Posted
Posted

I have a RWD car with a collapsable spare tire, my car came with 18" wheels (25" diameter) I now have 19" wheels (26.5" diameter), in an emergency could I run the spare tire without damaging the ring and pinion?

 

Thanks,

Ahsai Member

Ahsai

Posted
Posted (edited)

I think the effect on the rear tires would be like running the car on a really big circular track so probably ok. Does it have traction control or PSM? 6% diff may have some effect on those systems. Not sure though.

Edited by Ahsai
creekman Member

creekman

Posted
  • Author
Posted

I think the effect on the rear tires would be like running the car on a really big circular track so probably ok. Does it have traction control or PSM? 6% diff may have some effect on those systems. Not sure though.

Ahsai...  Thanks for the reply...  yes my car has PSM.  The spare has never been on the ground, but you never know so I appreciate your input.

creekman Member

creekman

Posted
  • Author
Posted

Um, PSM may not like the 6% diff...

Could you switch off the PSM during an emergency, would that make the PSM happy?

Ahsai Member

Ahsai

Posted
Posted

Not sure. My understanding is even if you switch it off, PSM is still monitoring everything in the background. If it thinks something is wrong and you happen to hit the brake, it will re-engage and intervene.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.