58 should be no big deal. As I said Rans uses 60-62T cw with inner cw in the
low 20s without problems. As long as the Fr der can be lifted high enough for
clearance of the 58t cw it will work. Chain may drag on the bottom of the
cage in the 32 but you probably won't be in that CW for very long. If the
chain length is correct now, then add the difference in CW teeth: 52 to 58 is
6t, or 3" of chain (6 links). Might not be necessary to add any chain.
Cycle through the rear cassette and see what the R der does on the larger
two cassette cogs, if it straightens out the cage and pulls the cage forward
add chain. Bents have a lot longer chain line and chain slack so are less
sensitive to chain length. Chain flop is sometimes a problem as the R der
can't wrap up all the chain, so some bents have intermediate chain idlers
or even auxiliary R der chain cages to wrap chain. Steve