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Kirkham Motorsports

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Old 04-05-2022, 01:56 PM
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Default Avon tires for CSX 6000 series 427 S/C

I have learned so much from these pages. To include that Avons are highly recommended for a street tire. And maybe occasional track use, but primarily a street tire [and DoT approved here in the US].

My questions:
1. Which Avon tire do you recommend?
2. What sizes? Front and rear?

Thanks again for your insights.
~ Brian
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Old 04-05-2022, 02:02 PM
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What model car (289 427) and what rim sizes?
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Old 04-05-2022, 02:11 PM
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title says CSX6000 427 S/C
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Old 04-05-2022, 03:57 PM
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I prefer the 225/65 up front and 295/50 rear.
I am not a fan of super wide fronts....

I've had two sets on order now since November, tires are the next issue across the US.
No tires at Kelsey with huge backlog
Kraus ???

Once mom's mini van is w/o tires the public will realize the situation at hand in the US. Most likely the blame will be Russia however I had trouble last year as well.
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Last edited by 1985 CCX; 04-05-2022 at 04:00 PM..
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Old 04-05-2022, 04:39 PM
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I had trouble the year before last year.....
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Old 04-05-2022, 06:58 PM
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Default CSX 6000 427 s/c

Yes, I should have specified 15" rims.

Avon seems to promote the CR6ZZ as the tire of choice for Cobras.

Is that the preference here?
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Old 04-05-2022, 07:03 PM
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Yes, the CR6ZZ’s are the way to go. I have 245’s on the front with no rubbing issues and 295’s on the back.
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Old 04-05-2022, 07:04 PM
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Default Preference for 225/65 up front

Quote:
Originally Posted by 1985 CCX View Post
I prefer the 225/65 up front and 295/50 rear.
I am not a fan of super wide fronts....
Jeff,

225 seems rather wide up front. To me anyway.

Though I am wondering about the trade off for moving up to the next size, 245/60.

Not advocating for them. Just want to understand what you prefer about the 225/65.

These pages continue to provide quite the education. Thanks for the good counsel.
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Old 04-05-2022, 07:43 PM
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Front: 245/65
Rear: 295/50
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Old 04-05-2022, 08:06 PM
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Front: 245/60
Rear: 295/50
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Old 04-05-2022, 10:27 PM
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I have 225/65-15 fronts and 295/50-15 rears on order from Roger Kraus at the moment. I believe the rears have arrived at Kraus while the fronts are due to arrive this month.
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Old 04-06-2022, 07:00 AM
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Default 295s for the rear. Up front?

Appreciate the feedback on your preferred tire sizes.

So far, unanimous agreement that the 295/50s are the way to go for the rear.

Up front, preferences for both the 225/65s and the 245/60s.

Can anyone explain the pros and cons here?

Again, many thanks!
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Old 04-06-2022, 07:21 AM
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SascoSports Inc is a full-function racecar preparation restoration shop

Check the tire heights on this list.
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Old 04-06-2022, 09:11 AM
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Quote:
Originally Posted by RockBit View Post
I have a workbook with calculated tire heights:
  • 225/65R15 has an overall height of 26.52"
  • 245/60R15 is 26.57" tall.
Difference is negligible.

I note the SascoSports web page lists both as 26.7" tall.
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Last edited by cycleguy55; 04-06-2022 at 09:15 AM..
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Old 04-06-2022, 09:29 AM
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Quote:
Originally Posted by CompFi View Post
Appreciate the feedback on your preferred tire sizes.

So far, unanimous agreement that the 295/50s are the way to go for the rear.

Up front, preferences for both the 225/65s and the 245/60s.

Can anyone explain the pros and cons here?

Again, many thanks!
SascoSports lists both as 26.7" tall. http://www.sascosports.com/tires_sea...im_diameter=15

Both have essentially identical heights / diameters, so that's a wash. Section and tread width for the 245/60R15 are wider by 0.8" than the 225/65R15, so that's a consideration if clearances are limited.

Worth noting is the 'Approved' rim width for 225/65R15 is 6.5"-8.0", with the 'standard' width being 7.0". For 245/60R15, the 'Approved' rim width is 7.5"-9.0", with a 'standard' rim width of 8.5". If you're running 7" wide wheels you're therefore limited to running 225/65R15. Conversely, if your wheels are 8.5" wide, then you'd need the wider tires.

The extra tread width on the 245/60R15 tires will increase turning effort at low speeds - which may be a consideration if you're not running power steering. The extra width should also increase grip at the front end which will affect your handling. If your car is already neutral in its handling, then wider tires could result in oversteer. If you're experiencing understeer, then wider tires will help to reduce that. IMO, for a car running 295/50R15 on the rear, 245/60R15 seems like a better match than does 225/65R15.
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Old 04-06-2022, 11:55 AM
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Rim width was one of the main reasons I chose the 225/65 over the 245/60. I have 7.5" wide rims on front. I didn't want to be at the narrow end of the recommended range, opted for being in the middle of the range.

Last edited by sd427; 04-06-2022 at 06:01 PM..
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Old 04-06-2022, 03:52 PM
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We have done a number of CSX Continuation Cobras. On the front we were using 245/65 15 but the steering was very heavy, especially at low speeds. We switched to 225 and steering was vastly improved. On the rear we go with the 295/50 15.
Here is a process we do where the AVONs, or any other manufacture, are turned into GOODYEAR Blue Streaks…….these were Dunlops that we did for Legendary Motorcars in Canada.
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Last edited by CompClassics; 04-07-2022 at 12:36 AM..
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Old 04-06-2022, 08:04 PM
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Quote:
Originally Posted by compclassics View Post
we have done a number of csx continuation cobras. On the front we were using 245/65 15 but the steering was very heavy, especially at low speeds. We switched to 225 and steering was vastly improved. On the rear we go with the 295/50 15.
Here is a process we do where the avons, or any other manufacture, are turned into goodyear blue streaks…….these were dunlops.
bravo!
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Old 04-09-2022, 12:36 AM
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John's work is fantastic! Nice!
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Old 04-09-2022, 12:54 AM
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I've already arranged to take my Avons to him.
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