Air suspension built-in. The Big Apple started off the Balloonbike trend ten years ago Comfortable cycling without using complicated technology! Air cushion tires are used as natural suspension. Inflated to 2 bar a balloonbike rolls really easily and with a full suspension effect. Enjoy unique Balloonbike comfort. Because life is hard enough. BIG APPLE LITESKIN. Feather light Balloonbike comfort. Depending upon size the LiteSkin version is ca. 150 to 200 g lighter than a conventional Big Apple tire. The weight reduction has been made possible using folding tire technology and the specially light LiteSkin side wall. There is no reduction in puncture protection! K-Guard 50 EPI 20-55 psi 285 grams SBC Compound