A fall loop that runs from open fields into wooded singletrack rarely keeps the same ground for long, and the Baby Limus Pro Tubeless Tire carries one setup through every stretch of it. This 700 x 38c cyclocross tire pairs a handmade Super Polyester casing with Challenge's Smart compound, so it grips wet sand and sticky mud and still rolls quickly on dry ground. Hand assembly also skips vulcanization, which keeps the rubber from being heated or hardened. What Our Gearhead(R) Experts Are Saying:"This 38c went onto hookless wheels without a second thought, since it's a listed fit for compliant hookless rims. Running it tubeless let me drop the pressure for soft sections without pinch flats, which kept the tire planted when a lap shifted from firm to sloppy."