As Radsport-News reports, the information comes from a now-deleted post by the Slovakian Cube dealer TM Sport. There, the Nuroad Aero C:68X for the 2027 model year—which has not yet been officially unveiled—was already listed with its model name and specifications. According to the leaked data, the XS frame size will feature 30.5-inch wheels, while sizes S through XL will have 32-inch wheels.

The new gravel bike is said to be equipped with 50-millimeter-wide Schwalbe G-One RS Pro tires, Newmen wheels, and a SRAM Force XPLR 1×13 drivetrain. Cube has not yet officially confirmed the model. It also remains unclear exactly what the “30.5-inch” designation refers to in technical terms. The already familiar 750D format has a rim seat diameter of 660 millimeters. In contrast, the leaked Cube data specifies a tire size of 50-654. Cube could therefore actually be preparing another, standalone wheel standard.

Its use in the smallest frame is likely due primarily to geometric reasons. Due to the high front end, the longer chainstays, and the potential for contact between the shoe and the front wheel, 32-inch wheels are difficult to fit into an XS frame. The 30.5-inch size could fill this gap without reverting to the established 29-inch standard.

If these reports are confirmed, Cube won’t just be bringing 32-inch wheels into mass production. The manufacturer would also be establishing yet another wheel size—with new tires, new rims, and an extra dose of complexity.