diff --git a/src/ol/tilegrid/tilegrid.js b/src/ol/tilegrid/tilegrid.js
index c5d04837d0..e987c31cae 100644
--- a/src/ol/tilegrid/tilegrid.js
+++ b/src/ol/tilegrid/tilegrid.js
@@ -5,13 +5,13 @@ goog.provide('ol.tilegrid.TileGrid');
 goog.require('goog.array');
 goog.require('goog.asserts');
 goog.require('ol.Coordinate');
-goog.require('ol.Extent');
 goog.require('ol.PixelBounds');
 goog.require('ol.Projection');
 goog.require('ol.Size');
 goog.require('ol.TileCoord');
 goog.require('ol.TileRange');
 goog.require('ol.array');
+goog.require('ol.extent');
 
 
 /**
@@ -205,10 +205,10 @@ ol.tilegrid.TileGrid.prototype.getTileRangeExtent =
   var resolution = this.getResolution(z);
   var tileSize = this.getTileSize(z);
   var minX = origin[0] + tileRange.minX * tileSize.width * resolution;
-  var minY = origin[1] + tileRange.minY * tileSize.height * resolution;
   var maxX = origin[0] + (tileRange.maxX + 1) * tileSize.width * resolution;
+  var minY = origin[1] + tileRange.minY * tileSize.height * resolution;
   var maxY = origin[1] + (tileRange.maxY + 1) * tileSize.height * resolution;
-  return new ol.Extent(minX, minY, maxX, maxY);
+  return ol.extent.createOrUpdate(minX, maxX, minY, maxY, opt_extent);
 };
 
 
@@ -222,11 +222,11 @@ ol.tilegrid.TileGrid.prototype.getTileRangeForExtentAndResolution =
     function(extent, resolution, opt_tileRange) {
   var tileCoord = ol.tilegrid.TileGrid.tmpTileCoord_;
   this.getTileCoordForXYAndResolution_(
-      extent.minX, extent.minY, resolution, false, tileCoord);
+      extent[0], extent[2], resolution, false, tileCoord);
   var minX = tileCoord.x;
   var minY = tileCoord.y;
   this.getTileCoordForXYAndResolution_(
-      extent.maxX, extent.maxY, resolution, true, tileCoord);
+      extent[1], extent[3], resolution, true, tileCoord);
   return ol.TileRange.createOrUpdate(
       minX, tileCoord.x, minY, tileCoord.y, opt_tileRange);
 };
@@ -272,10 +272,10 @@ ol.tilegrid.TileGrid.prototype.getTileCoordExtent =
   var resolution = this.getResolution(tileCoord.z);
   var tileSize = this.getTileSize(tileCoord.z);
   var minX = origin[0] + tileCoord.x * tileSize.width * resolution;
-  var minY = origin[1] + tileCoord.y * tileSize.height * resolution;
   var maxX = minX + tileSize.width * resolution;
+  var minY = origin[1] + tileCoord.y * tileSize.height * resolution;
   var maxY = minY + tileSize.height * resolution;
-  return ol.Extent.createOrUpdate(minX, minY, maxX, maxY, opt_extent);
+  return ol.extent.createOrUpdate(minX, maxX, minY, maxY, opt_extent);
 };
 
 
@@ -401,8 +401,8 @@ ol.tilegrid.createForProjection =
     function(projection, opt_maxZoom, opt_tileSize) {
   var projectionExtent = projection.getExtent();
   var size = Math.max(
-      projectionExtent.maxX - projectionExtent.minX,
-      projectionExtent.maxY - projectionExtent.minY);
+      projectionExtent[1] - projectionExtent[0],
+      projectionExtent[3] - projectionExtent[2]);
   var maxZoom = goog.isDef(opt_maxZoom) ?
       opt_maxZoom : ol.DEFAULT_MAX_ZOOM;
   var tileSize = goog.isDef(opt_tileSize) ?
@@ -414,7 +414,7 @@ ol.tilegrid.createForProjection =
     resolutions[z] = size / Math.pow(2, z);
   }
   return new ol.tilegrid.TileGrid({
-    origin: projectionExtent.getBottomLeft(),
+    origin: ol.extent.getBottomLeft(projectionExtent),
     resolutions: resolutions,
     tileSize: tileSize
   });
diff --git a/test/spec/ol/tilegrid/tilegrid.test.js b/test/spec/ol/tilegrid/tilegrid.test.js
index 4f9abc8951..8c26240147 100644
--- a/test/spec/ol/tilegrid/tilegrid.test.js
+++ b/test/spec/ol/tilegrid/tilegrid.test.js
@@ -9,7 +9,7 @@ describe('ol.tilegrid.TileGrid', function() {
 
   beforeEach(function() {
     resolutions = [1000, 500, 250, 100];
-    extent = new ol.Extent(0, 0, 100000, 100000);
+    extent = [0, 100000, 0, 100000];
     origin = [0, 0];
     origins = [];
     tileSize = new ol.Size(100, 100);
@@ -452,22 +452,22 @@ describe('ol.tilegrid.TileGrid', function() {
       var tileCoordExtent;
 
       tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(0, 0, 0));
-      expect(tileCoordExtent.minX).to.eql(0);
-      expect(tileCoordExtent.minY).to.eql(0);
-      expect(tileCoordExtent.maxX).to.eql(100000);
-      expect(tileCoordExtent.maxY).to.eql(100000);
+      expect(tileCoordExtent[0]).to.eql(0);
+      expect(tileCoordExtent[1]).to.eql(100000);
+      expect(tileCoordExtent[2]).to.eql(0);
+      expect(tileCoordExtent[3]).to.eql(100000);
 
       tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(3, 9, 0));
-      expect(tileCoordExtent.minX).to.eql(90000);
-      expect(tileCoordExtent.minY).to.eql(0);
-      expect(tileCoordExtent.maxX).to.eql(100000);
-      expect(tileCoordExtent.maxY).to.eql(10000);
+      expect(tileCoordExtent[0]).to.eql(90000);
+      expect(tileCoordExtent[1]).to.eql(100000);
+      expect(tileCoordExtent[2]).to.eql(0);
+      expect(tileCoordExtent[3]).to.eql(10000);
 
       tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(3, 0, 9));
-      expect(tileCoordExtent.minX).to.eql(0);
-      expect(tileCoordExtent.minY).to.eql(90000);
-      expect(tileCoordExtent.maxX).to.eql(10000);
-      expect(tileCoordExtent.maxY).to.eql(100000);
+      expect(tileCoordExtent[0]).to.eql(0);
+      expect(tileCoordExtent[1]).to.eql(10000);
+      expect(tileCoordExtent[2]).to.eql(90000);
+      expect(tileCoordExtent[3]).to.eql(100000);
     });
   });
 
@@ -519,7 +519,7 @@ describe('ol.tilegrid.TileGrid', function() {
         origin: origin,
         tileSize: tileSize
       });
-      var e = new ol.Extent(45000, 5000, 55000, 15000);
+      var e = [45000, 55000, 5000, 15000];
       var tileRange;
 
       tileRange = tileGrid.getTileRangeForExtentAndZ(e, 0);
@@ -633,7 +633,6 @@ describe('ol.tilegrid.TileGrid', function() {
 });
 
 goog.require('ol.Coordinate');
-goog.require('ol.Extent');
 goog.require('ol.Size');
 goog.require('ol.TileCoord');
 goog.require('ol.projection');