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Shimano Deore RD-M591 Long Cage Rear Derailleur

Mfg PartNum:IRDM591SGSL
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Shimano's Deore RD-M591 Long Cage Rear Derailleur is a bulletproof option for 8 or 9 speed bicycles. It features a light shift effort and Shimano's Double-Servo-Panta mechanism for quick, clean gear changes every time.

Aluminum body construction with steel plates. 34T max sprocket. 22T max front difference. Top-Normal operation.

Available in black (not pictured).

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.


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Reviewed 6/13/2019
by basho
Daily Commuter
San Francisco, CA
Value Rating
Overall Rating
Solid option for 7 speed

I use this on a 1 x 7, steel frame city bike, daily commuting mostly. It replaced an old Acera, which was working fine, but this feels like a significant step up, for not much more money. Easy to set up, looks good, and shifting is smooth. Maybe a longer cage than I really need but I haven't used that many derailleurs to know.

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Reviewed 5/6/2019
by Anonymous
Cycling Enthusiast
Value Rating
Overall Rating
Great product.

Only about 50 miles on it, but those were very tough and muddy miles. Still operates flawlessly.

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Reviewed 5/30/2019
by MarkFreund
Milwaukee WI
Overall Rating
1 of 1 customers found this review helpful.
Great Touring Rear Derailleur

Wide range, handles a triple crank and wide range cassette with ease.

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