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The chainstays have a bit of room for the 2.0 inch 650b road tire, less for a 650b knobby, but plenty for a 700c cyclocross tire. Coastline Cycle Co. The One SSRX 650b bike. © Cyclocross Magazine

The chainstays have a bit of room for the 2.0 inch 650b road tire, less for a 650b knobby, but plenty for a 700c cyclocross tire. Coastline Cycle Co. The One SSRX 650b bike. © Cyclocross Magazine