Riders and workshop mechanics keeping a silver 9-speed Deore triple running with a matching Shimano middle ring.
This is the 32T middle ring for the silver version of Shimano's Deore FC-M590 triple crankset (FC-M590-S), the 44-32-22T set-up. Shimano's parts catalogue also lists it for the FC-M532. It is a 9-speed ring on a 104 mm bolt circle with four mounting bolts, made from steel with a silver finish.
Use it when the middle ring on your triple is worn, hooked or chipped and shifting to and from it has got rough. It replaces the middle ring only, so your outer ring, inner ring, arms and bottom bracket stay in place. Count the teeth and check the bolt circle before you buy, and remember it is a 9-speed ring, so it is not the one for a 10-speed crank. A worn chain can make a new ring skip, so give the chain a check at the same time.
32T middle ring
Sits in the middle position of a 44-32-22T triple.
104 mm bolt circle
Four-bolt pattern on the 104 mm bolt circle Shimano uses for the outer and middle rings of the FC-M590.
Made for 9-speed
Shimano lists it for the 9-speed Deore FC-M590 triple.
Silver steel ring
A steel ring with a silver finish to match the silver version of the crankset.
Chainring
Fits
Great for
Maybe not for
One size: 32T on a 104 mm bolt circle with four bolts. It is the middle ring only. The outer ring, inner ring and crank arms are separate parts.
Silver or black?
Shimano makes this ring for the FC-M590 in two finishes. This silver one (Y1J898070) goes with the silver FC-M590-S. The black FC-M590-L takes a black 32T ring with a different part number. Both are 104 mm, four-bolt, 9-speed middle rings, so pick the colour to match your crank.
