-
A few examples...
http://www.leboncoin.fr/velos/878554835.htm?ca=22_s
http://www.leboncoin.fr/velos/872777210.htm?ca=22_s
http://www.leboncoin.fr/velos/848939454.htm?ca=22_s
http://www.leboncoin.fr/velos/874638603.htm?ca=22_s
http://www.leboncoin.fr/velos/877483356.htm?ca=22_s
http://www.leboncoin.fr/velos/868377488.htm?ca=22_s
http://www.leboncoin.fr/velos/875840219.htm?ca=22_s
http://www.leboncoin.fr/velos/874233309.htm?ca=22_s
Comprehensive, thanks!
It's lead me to this place which seems very useful -
http://www.mytenspeeds.com/My_TenSpeeds_1/Site%20Contents/Bicycle_Basics/Bicycle_Determining_Quality/Determining_Quality_13_Page.htm