Bobs Track Builder — Xpacks

Whether you want to recreate your local go-kart track or design a fantasy circuit through a canyon, are the toolkit that turns ambition into reality.

In the world of sim racing modding, few tools have democratized track creation quite like Bob’s Track Builder (BTB) . For over a decade, BTB has served as the bridge between a simple idea and a drivable circuit in games like rFactor , Assetto Corsa , Race 07 , and GTR2 . However, the true power of BTB isn't just in its node-based editor—it lies in its Xpacks . What Are BTB Xpacks? At their core, Xpacks are themed asset libraries and terrain generators designed specifically for Bob’s Track Builder. Instead of building every tree, wall, kerb, and grandstand from scratch, Xpacks provide users with a "shortcut to realism." They are drag-and-drop ecosystems that allow track builders to focus on layout and flow rather than getting bogged down in 3D modeling. bobs track builder xpacks

Well-coded Xpacks come with optimized LODs (Levels of Detail). This means the sim doesn't render a 50,000-polygon tree when you are 500 meters away. Using community-tested Xpacks ensures your track runs smoothly on a wide range of hardware. Whether you want to recreate your local go-kart