Tubeless? Nah... These Are Airless Tires! 40
Credit: Cheers to ChopMTB for the find.
Though we're not sure how'd they'd hold up to some serious thrashing, these airless bike tires are certainly interesting. No, they aren't the cheesy solid rubber or foam tube replacements that you can buy at Walmart... countless hours of engineering and testing has been done to get the tires to the point they're at today. How amazing would it be to ditch the pump, spare tube, and patch kit from your pack, let alone always knowing your tires were ready to rock? The Energy Return Wheel (ERW) concept was originally developed for cars and has since been brought to mountain bikes by Brian Russell from Boulder, Colorado.