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The GAN GR Disk has 12mm thru-axles and flat mount calipers. Colin Strickland's 2018 Gravel Worlds Pinarello GAN GR Disk Gravel Bike. © Z. Schuster / Cyclocross Magazine

The GAN GR Disk has 12mm thru-axles and flat mount calipers. Colin Strickland’s 2018 Gravel Worlds Pinarello GAN GR Disk Gravel Bike. © Z. Schuster / Cyclocross Magazine