Dia-Compe 981 - vertical adjustment range
The elongated slot is unseen when the brakepad assembly is fitted. To lower the pad for 700c requires very little movement (only 4 mm.) and this allows just enough vertical movement to use either 27 inch or 700c wheels. This would have been impossible on classic Mafac cantilevers. This seems a great idea - perfect for the period when 700c was finally finding acceptance in the US over the earlier standard of 27 inch wheels.
Notice the date stamped near the bushing: 01 86
DSCF1902
Dia-Compe 981 - vertical adjustment range
The elongated slot is unseen when the brakepad assembly is fitted. To lower the pad for 700c requires very little movement (only 4 mm.) and this allows just enough vertical movement to use either 27 inch or 700c wheels. This would have been impossible on classic Mafac cantilevers. This seems a great idea - perfect for the period when 700c was finally finding acceptance in the US over the earlier standard of 27 inch wheels.
Notice the date stamped near the bushing: 01 86
DSCF1902