The F725  Orange Closed Cell Foam for 1/10 4wd Buggy front tires. This insert is precision cut with contoured channels that allow more flex in the insert providing more stability, consistency and faster lap times. The channels are reduced near the sidewalls to keep the sidewall stability to provide more balanced turning. Foams are a major tuning option and should never be overlooked when trying to reach the fastest laps at the race track.