I have a 16" wheel folder that currently has a 44t chainring coupled with an IGH 4 speed. I am going to change to a nexus alfine 8 speed hub with 16t sprocket. In order to make it work I need to go to a larger chainring. It has a four arm/four bolt crankset. Is it possible to find a 52, 53, or 56t chainring with four bolt holes, or will I need to change the crakset to get the chainring I need?