Hatch is correct. Given 'typical' and equivalent tire pressures, a 2" diameter change will probably net you .010-.015. I went the other way a number of years ago, trying to deal with the very loose rollout at Quaker City. I went from a 25-26" tall street type tire to a 23" frontrunner, and was surprised to find that I only gained about .015 in r/t.
Quote:
Originally Posted by treessavoy
True you get a longer run but the roll out distance is the same, the taller the tire the sooner you can leave on the tree.
Small tire, big tire you still have to roll that 9 inches to break the beam.
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What you are saying is only applicable if you're deep-staging, in which case you have part of the tire *in front of* of the stage beam, with the remainder being between the stage and pre-stage beams. In regular staging, the 'extra' tire is still *behind* the pre-stage beam, and that too needs to clear the stage beam to stop the r/t clock.
Much of this is discussed in my Guide to Bracket Racing, at
www.staginglight.com/guide/