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Trek 520 Large Size   Back
Front: 48/36/26
Rear: 11-36
LowGear: 0.72
HighGear: 4.4
Range: 611%
LowInch: 19
HighInch: 119

This would be the large size with 175 cranks. Tire it ships with is Bontranger H1 700x38 which would make the wheel diameter a bit bigger than 27". (My Miyata has 32mm tires, and measures 27".