Originally Posted by
eldercycling
Is there a way of modifying the dropouts to use shimano deraileurs? I did a little googling but I am at a little bit of a loss where to start. It seems that the shimano need a tapped hole to thread into for mounting where the simplex is fixed into the dropout?
Yes, you need to tap 10mm x 1mm threads, and depending on which version of Simplex dropout you have, you may need to file a stop for the upper derailleur pivot at about the 7 o'clock position.
