|
Goodyear Blue Streak racing tires
Can anyone tell me what the "typical" size would have been for a Goodyear Blue Streak racing tire used on the front (7.5" rim) of the 1965/1966 competition 427 Cobras.
Thanks Cheers Greg |
1 Attachment(s)
I think you are after G6, however I think original size was..... :confused:
5.50/9.75-15 AKA narrow in today's world:3DSMILE: |
So what do the size designations mean?
R6 (vintage 1960's) vs G6 (more modern) tread type? 5.50 (section height)? 9.75 (tread width)? Couldn't find info on Roger Krause website. Cheers Greg |
Gregg
Probably best to just go with standard modern G6 Blue Streak, no? Roger Kraus Racing - Pricing Tire Size DOT DIA T.W. Section Width WHEELS A 550-15 G-12 GOODYEAR N 25.5 6.6 9.3 on 7.0 6.5 - 9.5 |
Thanks Jeff. I should have been more detailed in my scenario.
I have an old 1965/1966 Halibrand Cobra II magnesium racing wheel (front :7.5" wide) that I'm cleaning up for display only purposes. I have an opportunity to get an old 1965 Goodyear Blue Streak tire to mount on the Halibrand for display only purposes. I was curious what the “correct” size Goodyear tire was used back in the day (1965/1966) on the front wheels so I don't get a tire that is too wide for the rim. Cheers Greg |
Thanks Jeff. I should have been more detailed in my scenario.
I have an old 1965/1966 Halibrand Cobra II magnesium racing wheel (front :7.5" wide) that I'm cleaning up for display only purposes. I have an opportunity to get an old 1965 Goodyear Blue Streak tire to mount on the Halibrand for display only purposes. I was curious what the “correct” size Goodyear tire was used back in the day (1965/1966) on the front wheels so I don't get a tire that is too wide for the rim. Cheers Greg |
Greg, this may help with how a tire is sized:
http://www.procarcare.com/images/sha...a/8852NG04.gif The actual tread width should be close to the wheel width. The section width should be a little wider than the wheel width. I've seen original Cobra 427's using Sunburst wheels with tires far too wide on the rear for the wheels. The tread edges actually curves down and the center of the tread sticks up. The owners are trying to fill up the rear fenders with big tires but the wheels weren't designed for the tires that wide. They just need to understand that there was a lot of excess space on wide fendered cars and leave it as originally intended. It's a pet-peeve of mine! Note the rear tires that are far too wide for the wheels: http://2.bp.blogspot.com/-UbI9uLS6GU...+Cobra+427.jpg Larry |
Wow, thats a lotta extra tread!
|
Thanks Larry. So I'm going to try to guess again.
For a Goodyear Blue Streak tire 5.50/9.75-15 from the mid 1960's: 5.50 is the tread width 9.75 is the section width Should fit the 1965 magnesium Halibrand Cobra II (7.5" front) wheel. Am I right? Cheers Greg |
Quote:
http://rogerkrausracing.com/racetire...ra+2015cat.pdf http://rogerkrausracing.com/racetire...+Race+2015.pdf It looks to me that the 5.50 dimension is not directly related to section height, though it's a better match there than any other dimension. 9.75 probably represents the section width, not the tread width. A current 6.00-15 G7 Blue Streak is listed as follows: 6.00-15: Diameter: 25.5" SW/Rim: 10.6"/8.0" Rim: 6.5"-10.0" Tread Width: 8.4" |
The problem is the size they're rated for isn't the actual size in real life. It was a screwy way of sizing them back in the day. Do you have the tire that you can actually measure the tread width?
Larry |
Quote:
Do these tires make my rear end look fat? |
The tire I will be getting is a 5.50/9.75X15. Since I'm going to need a tube anyways, I'm going to contact Roger Krause racing directly for more info.
Cheers Greg |
Original tire sizes are supposedly included in these listings - though you have to dig a little to find them for each year, etc. Shelby Cobra data catalogue
I express no opinion as to the accuracy of the data! |
Thanks Brian. Seen that website before. Good info but the tire detail is pretty thin and not very accurate.
Ideally for my research, this is the kind of detail I look for on each car model: Tires: Goodyear, Power Cushion, HP, Nylon, Blue Dot, 8.15x15, 3-T, TUFSYN or Tires: Goodyear, Blue Streak, Sports Car Special, 5.95/9.75x15, Nylon, R4 Cheers Greg |
Quote:
I realize fitting these widths in some of the original cars may be more difficult than fitting them in the replicas, but it sure does speak to how tires and cars have changed in 50+ years, when small sporty cars carry meatier rubber than the original Cobras! |
Don't forget that the Goodyear Blue Streak "Stock Car Specials" were used also.
|
Quote:
And "BLUE STREAK SPEEDWAY SPECIAL" like when SAI ran on Cobras at Kent Washington. |
| All times are GMT -7. The time now is 09:00 PM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: