Urtopia Urtopia Carbon Fold Review: Is a 29-lb Carbon Folder Enough Bike for Steep Hills? It's a genuinely light, well-built folding commuter for flat-to-rolling terrain, but independent testing found it underpowered and inconsistent for the sustained 15-20%+ grades common in West Linn, so treat it as a poor primary choice for serious hill-climbing riders over 50.