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#1
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4" or 6" Rim??
Happy Easter... I plan to run a 165/80/15 tire up front, which is recommending a 5" rim. However, the AR wheels I am going with are only available in 4" or 6" widths .
Since the tire size is right in the middle, I am sure either rim would work ok- but if I am going to go a little beyond the mfg recommendation, would it be better to go with the 4" rim or the 6" rim in this scenario?
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68 Firebird-- Street/Strip - 400/461 Eagle Forged Bottom End & Ross Flat top pistons. KRE 325 CFM D port, Ultradyne 263/271 @.050, .4267 lift. Crower Solid roller lifters and 1.65 stainless rockers. Quickfuel 1000 on Torker2 intake and 2" open spacer. Hedman 1.75" headers. TH400 w/brake. Ford 9" w/3.80 gears & 28x9 Hoosier pro bracket drag radial. Best ET: 1.35 60ft, 6.29 @ 107.20 mph, 9.99 @132.33 mph. 3,300 race weight |
#2
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That tire size is commonly used on older air-cooled VW bugs that came with 4” wide wheels from the factory.
Pretty small tire size for the front of a V8 American car, I ran that size on some 3-1/2” Centerline wheels on my GTO for a while. Not really ideal but if you’re going for a certain look you compromise. All that said the 4” wheel is a better looking choice but a 6” wheel will offer more stability, it all depends on what you’re trying to achieve.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
#3
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Thank you for the comments. I am going for that fat & skinny look, similar to this pic... one thing about a 6" rim is I would have more flexibility to go to a larger tire like a 205/75 if I did not like the smaller tire. Decisions...
Sent from my SM-G965U using Tapatalk
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68 Firebird-- Street/Strip - 400/461 Eagle Forged Bottom End & Ross Flat top pistons. KRE 325 CFM D port, Ultradyne 263/271 @.050, .4267 lift. Crower Solid roller lifters and 1.65 stainless rockers. Quickfuel 1000 on Torker2 intake and 2" open spacer. Hedman 1.75" headers. TH400 w/brake. Ford 9" w/3.80 gears & 28x9 Hoosier pro bracket drag radial. Best ET: 1.35 60ft, 6.29 @ 107.20 mph, 9.99 @132.33 mph. 3,300 race weight |
#4
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FWIW - the recommended rim width for a 165/80/15 is 4 - 5.5".
https://www.tirerack.com/tires/tires...omCompare1=yes Personally, I'd go with the 205/75/15 as the 165/80/15, besides being very skinny, is only 25.4" tall. The tread width on the bigger tire is very similar and the tire height is 27". Recommended rim width is 5 - 7". https://www.tirerack.com/tires/tires...omCompare1=yes |
#5
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Quote:
Anything more than 26.1" diameter will rub on the rear side of the fender well on a firebird during turns, even with button head bolts. A 195/70 would be closer to stock diameter (25.7"), still be skinny, and the recommended rim is 5-6". And then with the 6" wide rim, in the future you could upsize to 205/65, 215/65, or even a 225/60 if you wanted. Lot more possibilities if you go with the 6".
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"The Mustang's front end is problematic... get yourself a Firebird." - Red Forman |
#6
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"Anything more than 26.1" diameter will rub on the rear side of the fender well on a firebird"
Good to know. I currently have a set of MT front runners on the car in shop (4×28) , but springs are too stiff and car is at least 2" higher in front than what it should be. Since the MTs are fairly new, I am hoping they will work on the drag strip. With the skinny weld wheels, there appears to be clearance, but again the car is currently too high to effectively determine clearance. I noticed that most of the tires in a 195/70 are for trucks, but the 205/70 is pretty close and offer a good selection. Sent from my SM-G965U using Tapatalk
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68 Firebird-- Street/Strip - 400/461 Eagle Forged Bottom End & Ross Flat top pistons. KRE 325 CFM D port, Ultradyne 263/271 @.050, .4267 lift. Crower Solid roller lifters and 1.65 stainless rockers. Quickfuel 1000 on Torker2 intake and 2" open spacer. Hedman 1.75" headers. TH400 w/brake. Ford 9" w/3.80 gears & 28x9 Hoosier pro bracket drag radial. Best ET: 1.35 60ft, 6.29 @ 107.20 mph, 9.99 @132.33 mph. 3,300 race weight |
#7
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Another thing you might think about is braking, those skinny little tires will make your stopping distance a lot longer. Take my word for it I found out the hard way.
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#8
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Hmmm.... I have been 126mph in one car and 137mph in another on "those skinny little tires" without stopping issues.
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#9
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Not when a Cadillac pulls out front you a half a block away and your going faster then you should be.
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#10
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Quote:
...or that modern Hyundai with 4 wheel abs discs, decides to lock them up because a squirrel ran across their path. On a track in a straight line, with plenty of open shutdown area, sure easy-peasy. On the street that can be curved or straight, with other traffic, whole new ball game.
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"The Mustang's front end is problematic... get yourself a Firebird." - Red Forman |
#11
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Quick update for anyone interested... after installing 200lb santuff drag springs and getting the stance correct... my 5" Weld Prostar wheels clear fine with a 4x28" runner.
I purchased the 6" AR Torque Thrust and installed 205/70/15 tires. Worked ok with just me in car, but with a passenger, outer front fenders would rub. I fooled around with spring spacers but then lost too much front end travel for my liking. I thought about selling the 6" rim and going 4", but the local tire shop was comfortable mounting a 165/80 on the 6" rim. So far so good, and I am happy with the look! Sent from my SM-G965U using Tapatalk
__________________
68 Firebird-- Street/Strip - 400/461 Eagle Forged Bottom End & Ross Flat top pistons. KRE 325 CFM D port, Ultradyne 263/271 @.050, .4267 lift. Crower Solid roller lifters and 1.65 stainless rockers. Quickfuel 1000 on Torker2 intake and 2" open spacer. Hedman 1.75" headers. TH400 w/brake. Ford 9" w/3.80 gears & 28x9 Hoosier pro bracket drag radial. Best ET: 1.35 60ft, 6.29 @ 107.20 mph, 9.99 @132.33 mph. 3,300 race weight |
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