Originally Posted by Al1943

From what I've read there is too much personal preference involved to say that there is an ideal trail. I've learned that I prefer more trail than what an average of all of the well known high performance road bikes offer. My favorite road bike has a trail of about 61 mm. I've read reports that says neutral steering is considered to be about 56 or 57 mm:

http://www.spectrum-cycles.com/612.htm

Al