Setup

From an empty game folder to your first ride. Each step checks something the next one depends on.

What you need

The ANT+ stick's driver

If Zwift, TrainerRoad, Garmin Express, Golden Cheetah or similar already work with your stick on this PC, the driver is installed. Skip this step.

Otherwise install the Garmin ANT USB driver, for example by installing Garmin Express once. Or use Zadig to install libusb-win32 or WinUSB for the stick; the mod works with both. Only replace a driver if nothing works yet, because other apps may need the one you have.

Installing

1. Install Script Hook RDR2. Copy ScriptHookRDR2.dll and the ASI loader dinput8.dll into the game folder (the folder with RDR2.exe). This mod does not include Script Hook. With Script Hook RDR2 V2, the loader is in its separate Mod Loader download. If another ASI loader is already installed, you don't need a second one.
2. Copy RDR2BikeMod.asi and RDR2BikeMod.ini from the download's Mod folder into the same game folder.
3. That's it. The mod writes its log next to itself. If the game folder is write-protected, the log and a fresh settings file go to %LOCALAPPDATA%\RDR2BikeMod instead.

To uninstall, delete RDR2BikeMod.asi, RDR2BikeMod.ini and the RDR2BikeMod* log, trace and crash files.

Your first ride

1. Free the trainer. Close Zwift, TrainerRoad, Rouvy, MyWhoosh, Garmin Express (check the system tray) and other cycling apps, and make sure no bike computer is controlling the trainer. Put an ANT+ stick on a USB extension cable, within about a metre of the trainer.
2. Start RDR2 in Story Mode. A yellow line in the top-right corner says the mod is loaded.
3. Get on a horse and pedal gently. The panel reads BIKE CONTROL: ON [Assist] and the horse moves off, following your speed through walk, trot, canter and gallop. It steers itself onto the nearest road or path and follows it; steer yourself whenever you like. If the panel says the trainer can't be found, see the troubleshooting.
4. Stop pedalling. After about two seconds the horse reins in, and it soon stops.
5. If the horse doesn't respond well, press F7 to try the next drive method.

Steering

By default the mod steers for you, along the game's roads and paths:

• Off the road it heads for the nearest one, joining it in the direction you're facing.
• On the road it follows it round the bends. At a fork or crossroads it goes the straightest way; at a T-junction it turns into one of the side roads.
• At a dead end it turns round. If it keeps meeting dead ends, it hands the steering back to you.
• Stuck against something, it turns out of it, then round.
• Steer yourself at any time with the keyboard or the controller's stick: it lets go while you do, and picks up the road you're on a moment after you stop. That's also how you take the other branch at a fork.

Press End to switch auto-steer off and steer yourself all the time, or set [Steering] Mode = Manual in the ini. On a route, the route does the steering.

Keys

You can change all of these keys in the ini. To take over by hand, hold the game's horse stop/brake control: the mod lets go while you hold it. It also lets go when you dismount, open the pause menu, in cutscenes, when you fall off, and when the trainer isn't connected. The panel's first line says why.

Drive methods

Settings worth changing

Every setting is explained inside RDR2BikeMod.ini. Edit it with Notepad and press F10 in the game to apply changes. To get the defaults back, delete the file; a fresh one is created the next time the game starts.