What was the highest lap count for Walker Racing with a grid larger than 15 one?
Driver Team Laps Time/Retired Grid Points
2004 Time Warner Cable Road Runner 250
16420963
text text real text real real
2-16420963-2
Race
Race
Ryan Hunter-Reay Herdez Competition 250 1:59:12.397 1 34
Patrick Carpentier Forsythe Racing 250 +5.865 secs 3 27
Michel Jourdain, Jr. RuSPORT 250 +11.349 secs 9 25
Jimmy Vasser PKV Racing 249 + 1 Lap 8 23
A. J. Allmendinger RuSPORT 249 + 1 Lap 13 22
Bruno Junqueira Newman/Haas Racing 248 + 2 Laps 10 19
Oriol Servià Dale Coyne Racing 247 + 3 Laps 11 17
Mario Domínguez Herdez Competition 246 + 4 Laps 4 15
Rodolfo Lavín Forsythe Racing 245 Contact 6 13
Mario Haberfeld Walker Racing 245 + 5 Laps 15 11
Justin Wilson Mi-Jack Conquest Racing 244 + 6 Laps 12 10
Roberto González PKV Racing 243 Fire 14 9
Alex Tagliani Rocketsports Racing 243 + 7 Laps 7 8
Nelson Philippe Rocketsports Racing 240 + 10 Laps 17 7
Alex Sperafico Mi-Jack Conquest Racing 240 + 10 Laps 18 6
Gastón Mazzacane Dale Coyne Racing 79 Contact 16 5
Paul Tracy Forsythe Racing 60 Contact 5 4
Sébastien Bourdais Newman/Haas Racing 50 Contact 2 3
SELECT MAX Laps FROM table WHERE Team = walker racing AND Grid > 15
walker racing 15