danielO said:M52/54 er.... i do not know la.
But i have just found out that my slightly small than 130mm is the correct size for my Infinitas-ASA SC kit.
Tecknic SC kits use the 140mm for stage 2.
Do not know the reasoning, but maybe infinitas's SC design is less efficient?
danielO said:I also don't know.
If you get buy a Tecknic Stage 2 SC kit, it will come with a 140mm pulley.
If you buy a Infinitas Stage 2 SC kit, you will get a 128mm pulley.
Maybe the plumbing, I/C etc makes for the difference?
:screwedu: