diff --git a/aichallenge/workspace/src/aichallenge_submit/racing_kart_description/config/vehicle_info.param.yaml b/aichallenge/workspace/src/aichallenge_submit/racing_kart_description/config/vehicle_info.param.yaml
index f411e8f1..038186d0 100644
--- a/aichallenge/workspace/src/aichallenge_submit/racing_kart_description/config/vehicle_info.param.yaml
+++ b/aichallenge/workspace/src/aichallenge_submit/racing_kart_description/config/vehicle_info.param.yaml
@@ -2,7 +2,7 @@
   ros__parameters:
     wheel_radius: 0.255
     wheel_width: 0.196
-    wheel_base: 2.14 # between front wheel center and rear wheel center
+    wheel_base: 1.087 # between front wheel center and rear wheel center
     wheel_tread: 0.975 # between left wheel center and right wheel center
     front_overhang: 0.467 # between front wheel center and vehicle front
     rear_overhang: 0.510 # between rear wheel center and vehicle rear