All-pairs driving times (minutes)

               Keputih     Gebang    Klampis     Manyar     Ngagel      Darmo  Wonokromo    Rungkut
    Keputih          0          4          7          9         15         18         15          9
     Gebang          5          0          3          5         11         14         19         14
    Klampis          8          3          0          2          8         11         16         17
     Manyar         12          7          4          0          6          9         14         20
     Ngagel         18         13         10          6          0          3          8         14
      Darmo         20         17         14         10          4          0          5         11
  Wonokromo         15         19         19         15          9          5          0          6
    Rungkut          9         13         16         18         15         11          6          0

Eccentricity of each candidate depot (worst outbound run):
       Keputih   18 min
        Gebang   19 min
       Klampis   17 min
        Manyar   20 min
        Ngagel   18 min
         Darmo   20 min
     Wonokromo   19 min
       Rungkut   18 min

center  = Klampis (eccentricity 17 min)
diameter = 20 min

Sum of out-and-back times from each candidate depot:
       Keputih  164 min
        Gebang  147 min
       Klampis  138 min
        Manyar  137 min
        Ngagel  140 min
         Darmo  152 min
     Wonokromo  171 min
       Rungkut  179 min

lowest total round-trip: Manyar (137 min)

The worst run out of the center, read back from Pi:
   Klampis -> Keputih -> Rungkut  (17 min)
