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)

245-35 18 Anyone ever put these on the fronts?

Recommended Posts

I'm going to be putting tires on my new rims soon and would like to go as wide as possible on the fronts to compliment the 285-30's I'm planning for the rears. This is on a 2000 Boxster S. The wheels are 8.5" et50mm and I am installing H&R sport springs with the intention of getting at least -1.5 degress camber and more likely -2.0 to -2.25 degrees. I would be willing to give up some turning radius if these would work. Any thoughts on the subject would be greatly appreciated.



Link to comment
Share on other sites

I believe the 245's will rub slightly on tight turns with a factory RoW sport suspension. If you go lower then it might rub even more. A safe bet is 235's (IMHO).

Thanks Loren. What part are you saying would rub against the tire? When I put the same size wheel and offset (Fikse FM-5's) with 225-40 Michelin Pilot Sport Cup tires the only potential clearance issue was with the plastic fender cover in the front. This was with the stock suspension, though. My fear is that with wider tires the small clearance will turn into a larger interference. Does additional negative camber generate more clearance to that plastic cover? It seems like it would, but I haven't the geometry to check it out.

Again, thanks for the reply,


Link to comment
Share on other sites

Due to the smaller overall diameter (compared to a 225/40) you may actually gain some clearance at full steering lock. The other potential rubbing points are the plastic air deflectors for the brakes and the clutch tubing in the driver's side wheel well.

Clearance increase/decrease due to camber is difficult to determine statically as the tire deforms under turning loads. You have to test to see what happens. If it rubs under no load -> bad, If it does not rub but is close you will need to test under load to see if there is a problem.

Link to comment
Share on other sites

Also tire brand will influence your clearance. A 245 from one manufacturer will be different than a 245 from another in terms of actual width. You may have a tire that fits fine and then decide to try a different brand or even a different model from the same manufacturer and find out that it rubs.

Link to comment
Share on other sites

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
  • 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.