I doesn't matter, they're all good, but just use one and then include pictures of the back side and close ups of the teeth so buyers can assess wear, pedal holes and dustcaps.
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1 Super Record bike, 1 Nuovo Record bike, 1 Pista, 1 Road, 1 Cyclocross/Allrounder, 1 MTB, 1 Touring, 1 Fixed gear