diff --git a/src/backfill.js b/src/backfill.js
index 6036033..129f1cb 100644
--- a/src/backfill.js
+++ b/src/backfill.js
@@ -21,9 +21,9 @@ const backfill = async function() {
     // get graph
     const graphOpts = {
       source: "osm/planet-181224",
-      tileHierarchy: 6
+      tileHierarchy: 8
     };
-    var graph = new shst.Graph(envelope, graphOpts);
+    var graph = new shst.Graph(envelope, graphOpts, 'bike');
     await graph.buildGraph();
     var pointMatcher = new shst.PointMatcher(envelope, graphOpts);