diff --git a/Sources/Core/ScreenViewTracking/ScreenSummaryState.swift b/Sources/Core/ScreenViewTracking/ScreenSummaryState.swift
index 6d3766040..ea57fc85b 100644
--- a/Sources/Core/ScreenViewTracking/ScreenSummaryState.swift
+++ b/Sources/Core/ScreenViewTracking/ScreenSummaryState.swift
@@ -23,7 +23,9 @@ class ScreenSummaryState: State {
     var lastItemIndex: Int?
     var itemsCount: Int?
     var maxYOffset: Int?
+    var maxXOffset: Int?
     var contentHeight: Int?
+    var contentWidth: Int?
     
     var data: [String: Any] {
         var data: [String: Any] = [
@@ -33,7 +35,9 @@ class ScreenSummaryState: State {
         if let lastItemIndex = lastItemIndex { data["last_item_index"] = lastItemIndex }
         if let itemsCount = itemsCount { data["items_count"] = itemsCount }
         if let maxYOffset = maxYOffset { data["max_y_offset"] = maxYOffset }
+        if let maxXOffset = maxXOffset { data["max_x_offset"] = maxXOffset }
         if let contentHeight = contentHeight { data["content_height"] = contentHeight }
+        if let contentWidth = contentWidth { data["content_width"] = contentWidth }
         return data
     }
     
@@ -66,8 +70,10 @@ class ScreenSummaryState: State {
     }
     
     func updateWithScrollChanged(_ event: ScrollChanged) {
-        maxYOffset = max(event.yOffset, maxYOffset ?? 0)
-        contentHeight = max(event.contentHeight, contentHeight ?? 0)
+        if let yOffset = event.yOffset { maxYOffset = max(yOffset, maxYOffset ?? 0) }
+        if let xOffset = event.xOffset { maxXOffset = max(xOffset, maxXOffset ?? 0) }
+        if let height = event.contentHeight { contentHeight = max(height, contentHeight ?? 0) }
+        if let width = event.contentWidth { contentWidth = max(width, contentWidth ?? 0) }
     }
 
 }
diff --git a/Sources/Snowplow/Events/ScrollChanged.swift b/Sources/Snowplow/Events/ScrollChanged.swift
index 44a62bc63..98f5b6b20 100644
--- a/Sources/Snowplow/Events/ScrollChanged.swift
+++ b/Sources/Snowplow/Events/ScrollChanged.swift
@@ -20,18 +20,50 @@ import Foundation
 @objc(SPScrollChanged)
 public class ScrollChanged: SelfDescribingAbstract {
     /// Vertical scroll offset in pixels
-    @objc
-    public var yOffset: Int
+    public var yOffset: Int?
+    /// Horizontal scroll offset in pixels
+    public var xOffset: Int?
     /// The height of the scroll view content in pixels
-    public var contentHeight: Int
+    public var contentHeight: Int?
+    /// The width of the scroll view content in pixels
+    public var contentWidth: Int?
 
     /// - Parameters:
     ///   - yOffset: Vertical scroll offset in pixels
     ///   - contentHeight: The height of the scroll view content in pixels
+    public init(xOffset: Int? = nil, yOffset: Int? = nil, contentWidth: Int? = nil, contentHeight: Int? = nil) {
+        self.yOffset = yOffset
+        self.xOffset = xOffset
+        self.contentHeight = contentHeight
+        self.contentWidth = contentWidth
+    }
+    
+    /// Vertical scroll offset in pixels
     @objc
-    public init(yOffset: Int, contentHeight: Int) {
+    public func yOffset(_ yOffset: Int) -> Self {
         self.yOffset = yOffset
+        return self
+    }
+    
+    /// Horizontal scroll offset in pixels
+    @objc
+    public func xOffset(_ xOffset: Int) -> Self {
+        self.xOffset = xOffset
+        return self
+    }
+    
+    /// The height of the scroll view content in pixels
+    @objc
+    public func contentHeight(_ contentHeight: Int) -> Self {
         self.contentHeight = contentHeight
+        return self
+    }
+    
+    /// The width of the scroll view content in pixels
+    @objc
+    public func contentWidth(_ contentWidth: Int) -> Self {
+        self.contentWidth = contentWidth
+        return self
     }
     
     override var schema: String {
@@ -39,9 +71,11 @@ public class ScrollChanged: SelfDescribingAbstract {
     }
 
     override var payload: [String : Any] {
-        return [
-            "y_offset": yOffset,
-            "content_height": contentHeight
-        ]
+        var data: [String: Any] = [:]
+        if let xOffset = xOffset { data["x_offset"] = xOffset }
+        if let yOffset = yOffset { data["y_offset"] = yOffset }
+        if let contentWidth = contentWidth { data["content_width"] = contentWidth }
+        if let contentHeight = contentHeight { data["content_height"] = contentHeight }
+        return data
     }
 }
diff --git a/Tests/ScreenViewTracking/TestScreenSummaryStateMachine.swift b/Tests/ScreenViewTracking/TestScreenSummaryStateMachine.swift
index bf8b41eb6..411481996 100644
--- a/Tests/ScreenViewTracking/TestScreenSummaryStateMachine.swift
+++ b/Tests/ScreenViewTracking/TestScreenSummaryStateMachine.swift
@@ -109,7 +109,9 @@ class TestScreenSummaryStateMachine: XCTestCase {
             if event.schema == kSPScreenEndSchema {
                 let entity = event.entities.first { $0.schema == kSPScreenSummarySchema }
                 XCTAssertEqual((entity?.data as? [String: Any])?["max_y_offset"] as? Int, 30)
+                XCTAssertEqual((entity?.data as? [String: Any])?["max_x_offset"] as? Int, 15)
                 XCTAssertEqual((entity?.data as? [String: Any])?["content_height"] as? Int, 100)
+                XCTAssertEqual((entity?.data as? [String: Any])?["content_width"] as? Int, 200)
                 expectScreenEnd.fulfill()
             }
         }
@@ -118,7 +120,7 @@ class TestScreenSummaryStateMachine: XCTestCase {
         
         _ = tracker.track(ScreenView(name: "Screen 1"))
         _ = tracker.track(ScrollChanged(yOffset: 10, contentHeight: 100))
-        _ = tracker.track(ScrollChanged(yOffset: 30, contentHeight: 100))
+        _ = tracker.track(ScrollChanged(xOffset: 15, yOffset: 30, contentWidth: 200, contentHeight: 100))
         _ = tracker.track(ScrollChanged(yOffset: 20, contentHeight: 100))
         _ = tracker.track(ScreenView(name: "Screen 2"))