That was basically the intent. To mark which ratios are close to 3.0, which is a good starting ratio for most flatlanders who use 700 wheels. The yellow on both charts just makes it easier to quickly x-reference ratios with skid patches.

I also bolded skid patches that were 7 or above as this roughly keeps the wear evenly distributed. (A skid patch often nds up being about a 1/8th circumference on the tire as most folks are not static in the skid, but of course the wear is concentrated in the center of that patch.)

Yes, this assumes singled sided skidding only. If your ambi then double the number of skid patches.

Al