On October 12, 2000, about 1127 hours Pacific daylight time, a Cessna 170B, N2562D, owned and operated by the pilot, nosed over during landing rollout at the San Carlos Airport, San Carlos, California. Visual meteorological conditions prevailed during the personal flight, and no flight plan was filed. The airplane was substantially damaged, and the private pilot was not injured. The flight was performed under 14 CFR Part 91, and it originated from San Carlos about 1115. The pilot reported that during the previous 90-day period he had flown his airplane for about 1.8 hours. The purpose of the accident flight was to practice landings. Upon completing one circuit around the traffic pattern, the pilot landed on runway 30, and the airplane decelerated. Upon slowing to about 15 miles per hour, the rudder lost effectiveness, and the airplane rolled toward the side of the runway. The pilot further reported that as the airplane was about to depart the runway he "stepped hard on the brakes," and the airplane nosed over. A witness reported that the midfield windsock indicated that a right quartering tail wind existed at the time of the mishap. According to San Carlos control tower personnel, at the time of the mishap the official wind was from 300 degrees at 4 knots.