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The Donnelly X-Plot MSO tread is a low-profile, fast-rolling gravel tire. Raleigh Tamland 1 Steel Gravel Bike. © Z. Schuster / Cyclocross Magazine

The Donnelly X-Plot MSO tread is a low-profile, fast-rolling gravel tire. Raleigh Tamland 1 Steel Gravel Bike. © Z. Schuster / Cyclocross Magazine