Vintage et Single speed
Search sheldonbrown.com and sheldonbrown.org Singlespeed Bicycle Conversions More and more cyclists are discovering the joys of simple, one-speed bicycles. Many cyclists are rebelling against the excessive complication, fragility and weight of current mountain bikes. Why ride a Singlespeed? Modern 24-27 speed bikes are marvels of technology, and allow a cyclist to select the gear ratio that will make the most efficient use of his/her energy.