Tom,

Per Sutherland's 5th Edition ca 1990 (before the ISO 120mm, 126mm and 130mm standards) hollow axle rear hubs came in the following OLN (Over Lock Nut) widths:

117mm ISO 3 and 4 Speed Freewheels

120mm Lower end Japanese

121mm Campagnolo (frequently listed as 120mm)

122mm ISO 4 and 5 Speed Freewheels, Lower end French and Italian

124mm Lower end French and Japanese

125mm Campagnolo

126mm ISO 5 to 7 Speed Freewheels, Lower end French, Italian and Japanese, Campagnolo

130mm Lower end French and Japanese, Campagnolo

I've seen specs and measured axles with 123mm, 127mm and 128mm OLN widths.

A lot of early 70's French bikes had 122mm wide rear dropouts with 96mm fork ends rather than the later 120mm and 100mm OLN widths.

Something else to consider, a lot of these hubs are over 40 years olde. One or more 1mm axle washers were frequently added to move the freewheel away from the rear stays so the chain didn't drag.

Putting a 120mm wide hub in 122mm wide dropouts shouldn't cause any problems. We used to spread the 120mm wide rear dropouts by 1mm or 2mm on racing bikes to facilitate fast rear wheel changes.

verktyg

Chas.