Help! Front Runner Tire Size

Help! Front Runner Tire Size - 03/30/12 12:42 AM

Hi Guy's....

How does the front Tire size affect the ET and or MPH? Example.. I had 27" M/T 4 ply street type skinny and the Moroso 26" track only skinny? Does the height affect the roll out, ET or MPH? Not sure what to purchase. Thanks, Joe

Posted By: Cab_Burge

Re: Help! Front Runner Tire Size - 03/30/12 01:33 AM

The front tire size can affect all three things, reaction time, ET and MPH

One inch is not much but it should be measurable

I have ran all the way from 22 inch front tall tires to 31 inch tall and most sizes in between

If your going to bracket race it or class race the car on a sportmans tree(.500 seconds between each light) I would use the tallest tire you can fit on the car

If your going to run on a Pro Tree(.400) and use electronics it doesn't matter what size front tire is on the car, you can dial in the delay box for the reaction times

Posted By: an8sec70cuda

Re: Help! Front Runner Tire Size - 03/30/12 12:59 PM

Shorter tire = quicker reaction time.
Taller tire = quicker ET due to less rolling resistance, supposedly.

Posted By: Mr.Yuck

Re: Help! Front Runner Tire Size - 03/30/12 02:08 PM

Quote:

Shorter tire = quicker reaction time.
Taller tire = quicker ET due to less rolling resistance, supposedly.

I'd think i'd be more of a RT change than ET change...

Posted By: an8sec70cuda

Re: Help! Front Runner Tire Size - 03/30/12 02:16 PM

Quote:

Quote:

Shorter tire = quicker reaction time.
Taller tire = quicker ET due to less rolling resistance, supposedly.

I'd think i'd be more of a RT change than ET change...

I think so too, hence my "supposedly" remark. I was just pointing out the general rule.

Posted By: pengwin

Re: Help! Front Runner Tire Size - 03/30/12 04:57 PM

In theory, a taller front tire will experience fewer revolutions over a given distance than a shorter tire, which results in less parasitic drag and better ET's.

Posted By: MR_P_BODY

Re: Help! Front Runner Tire Size - 03/30/12 05:28 PM

A taller tire will result in longer roll out on the
lights giving you a better rolling start which will
end up in a quick ET.... but if your concern is the RT
then the short tire will break the beams sooner