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The Boone RSL frame has narrow chainstays with claimed clearance for 38mm tires. Trek Boone RSL Cyclocross Frameset and Bike. © Z. Schuster / Cyclocross Magazine

The Boone RSL frame has narrow chainstays with claimed clearance for 38mm tires. Trek Boone RSL Cyclocross Frameset and Bike. © Z. Schuster / Cyclocross Magazine