diff --git a/rowers/models.py b/rowers/models.py
index 15046a7a..528c28b9 100644
--- a/rowers/models.py
+++ b/rowers/models.py
@@ -173,7 +173,7 @@ class Rower(models.Model):
 
     # Power Zone Data
     ftp = models.IntegerField(default=226,verbose_name="Functional Threshold Power")
-    otwslack = models.IntegerField(default=15,verbose_name="OTW Power slack")
+    otwslack = models.IntegerField(default=0,verbose_name="OTW Power slack")
 
     pw_ut2 = models.IntegerField(default=124,verbose_name="UT2 Power")
     pw_ut1 = models.IntegerField(default=171,verbose_name="UT1 Power")