LVDell

Those are cm sizing. Maybe to save printing cost they chose cm instead of mm like EVERYBODY else

64=640mm
etc
etc
etc

aussie jimmy

ok thanks, so 24 = 240, so 64/65 is the diameter? why use different diameter front/rear?

LVDell

Just depends on what sizing they have available and what is required by a marque, series, etc. Many of the cars have very different F to R diameters. For example, the 997.

First number is the width in cm, so 2=240cm wide
Second number is the diameter in cm
Third is the wheel size in inches

aussie jimmy

thanks dell!
you need to get back into a 6 3 and put some slicks on it!

Crazy Canuck

I have a new set of Michelin slicks waiting to get picked up.

LVDell

You ain't kidding! I would have loved to run that car on a new set of slicks. I did the chance to run a set of slicks that I bought used. They were Yokohama slicks in 250 front 280 rear. Had over 20 HC's on them by me and whatever they had when I bought them used. They were only marginally faster than the Hoosier R6 I ran (probably due to age and HC's). I intended (and actually had an order of 5 sets placed) to run the Pirelli slicks for the 6-3 in 245 front 305 rear. The car would have been amazing but then I cancelled the order and sold the car to Joe

himself

It's an amazing thing to drive on slicks. And the first big gain isn't all that's in the tires. When you massage them for all their worth and live in the very small "slip zone" you will be utterly amazed.

I do have a question about the 10 second improvement over MPSCups. IMO, that's a HUGE differential. Did anything else change since the last time you were there? Conditions? Maybe you are a much better driver

Many folks here have driven a gamut of tires on the track and, in my experience, there are only a handful of seconds between fast R-comps to slicks. 10 seconds leads me to believe something else significant changed.

-td

FFaust

Hate to keep coming back to drug analogy, but it does sound a lot like the pushers who give out free drugs to potential customer

Don't know if you've seen these, but many guys have small trailer to carry their track wheels and a few tools. Pic below.



Thanks! Now all I've got to do is remember this

Man, you really are all about safety aren't you

spare tire

24-64-18 24 = 240 mm ( tread width ) 64 = 640 mm ( tire Diameter ) 18 = rim size

converted for standard sizes 240/35/18 is close

The size of rolling diameter for a 64 = 25.2 inches or normal for the rear of a 996 GT3
The size of rolling diameter 65 = 25.6 inches
The diameter 68 = 26-3/4 inches way to big for the ABS compared to the front rolling diameter

philooo

any idea where to buy the necessary hardware to add a tow hook to the 911 ?

and specs for the trailer not to exceed ?

spare tire

It looks simple enough. Remove the exhaust tips and add the trailer hitch to the exhaust pipes.

himself

^ Now that's funny!

Q&A

@ Himself. I am only tracking for one year now and had never been on a track before. Guess it's the learning curve combined with tires. Personally i feel always a bit intimidated by my GT3 even when i just step into the car in the morning heading to a track day. Kind of a nervous feeling. I have a full track day prepped E36 BMW too and i never had that with the Beamer. Guess the speed comes as soon as you are able to be in balance with the car and be less intimidated by her (him ?)
And that's where for me the slicks came in as a feeling of extra security.
So i guess at my level of tracking, it's all between the ears, and gaining speed is all about confidence. I am sure you can set the same lap times as i was doing on Pilot Sport 2 with a good driver ;-) Same track was lapped in a 944 Turbo Cup on slicks in 1:45. For true racing drivers slicks or no slicks is pure physics and math and has nothing to do with confidence (i guess)

If you're interested here my previous fastest lap (2:04) not so long ago so you can see the differences

FFaust

One option.

http://www.willwoodsystem.com/