Unfortunately my chainguard broke down but it seems to give the FC-M543 / T551 (48 teeth) Shimano directly not a spare part. Nevertheless, I have after a long search and investigation finally dared a shot in the dark and I bought this chainguard, but not from Amazon (The article is in line, however, is thus the same). And it fits perfectly, the hole spacing of the M543 therefore agrees 100% with the FC-M590 match. Hope this helps others who have the same problem.
Yet a little criticism of the item description - from this should indicate that this is the version with 48 teeth.
