Smaller Tires

tex22 · 03-05-2011, 06:11 PM

I am using a 28" tire and am considering going to a 27". From experience how much did it pick or slow the car/reaction and 60 ft? Thanks

BobUnkefer · 03-30-2011, 08:45 PM

Nolan,
I've been thinking along the same lines, did you ever get any response?

Unk

Myron Piatek · 03-30-2011, 08:56 PM

I don't know the number off hand, but a smaller tire with the same air pressure and staging/launching the same way as with a taller tire, will result is a slightly faster reaction time while slowing 60' and the rest of the elapsed times down a bit down the track.

A shorter tire takes less time to clear the starting line beams for a quicker RT while getting less of a running start before clearing the beams and actually starting the ET clocks.

Tim Ellis · 03-30-2011, 09:46 PM

I believe 1" shorter would be about .01 quicker R.T

greg fulk · 03-31-2011, 02:20 AM

I went from 28" Hoosiers to 27.5 M/T & saw no change.... that being said I can't drive this dam car on the starting line. I have a 2-step going in before Indy Div. !

Mike Taylor 3601 · 03-31-2011, 09:40 AM

If I remember correctly I went from 26'' to 28'' I think it was about .030-.040 it has been awhile. I recommend you measure the tires what is on sidewall isn't always same as measurement.27'' in one tire may measure same as a 28'' especially from one brand to the next.
An example I have 9X29 Goodyears on back of my car my brother ran 9X29.5 M/T they are 2-3'' bigger every direction than my tires,front runners probaly are'nt as variable in size
but I would measure.
Mike Taylor 3601

03-05-2011, 06:11 PM	#1
tex22 Junior Member Join Date: Sep 2007 Location: Houston, Texas Posts: 81 Likes: 1 Liked 0 Times in 0 Posts	Smaller Tires I am using a 28" tire and am considering going to a 27". From experience how much did it pick or slow the car/reaction and 60 ft? Thanks __________________ Nolan Grier 4785

03-30-2011, 08:45 PM	#2
BobUnkefer Member Join Date: Jan 2006 Location: Kansas City, MO Posts: 465 Likes: 0 Liked 0 Times in 0 Posts	Re: Smaller Tires Nolan, I've been thinking along the same lines, did you ever get any response? Unk __________________ Bob Unkefer 4409 STK

03-30-2011, 08:56 PM	#3
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,542 Likes: 34 Liked 138 Times in 51 Posts	Re: Smaller Tires I don't know the number off hand, but a smaller tire with the same air pressure and staging/launching the same way as with a taller tire, will result is a slightly faster reaction time while slowing 60' and the rest of the elapsed times down a bit down the track. A shorter tire takes less time to clear the starting line beams for a quicker RT while getting less of a running start before clearing the beams and actually starting the ET clocks. Last edited by Myron Piatek; 03-30-2011 at 09:06 PM.

03-30-2011, 09:46 PM	#4
Tim Ellis Member Join Date: Dec 2004 Location: Beavercreek Or. Posts: 272 Likes: 31 Liked 7 Times in 6 Posts	Re: Smaller Tires I believe 1" shorter would be about .01 quicker R.T

03-31-2011, 02:20 AM	#5
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: Smaller Tires I went from 28" Hoosiers to 27.5 M/T & saw no change.... that being said I can't drive this dam car on the starting line. I have a 2-step going in before Indy Div. ! __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

03-31-2011, 09:40 AM	#6
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,368 Likes: 346 Liked 292 Times in 101 Posts	Re: Smaller Tires If I remember correctly I went from 26'' to 28'' I think it was about .030-.040 it has been awhile. I recommend you measure the tires what is on sidewall isn't always same as measurement.27'' in one tire may measure same as a 28'' especially from one brand to the next. An example I have 9X29 Goodyears on back of my car my brother ran 9X29.5 M/T they are 2-3'' bigger every direction than my tires,front runners probaly are'nt as variable in size but I would measure. Mike Taylor 3601