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Shimano Deore RD-M591 9 Speed Top Normal Rear Derailleur - Black - SGS / Long Cage

£34.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
Available in black or silver. Deore rear derailleurs are offered in Shadow for off-road MTB and Double-Panto (conventional) which are best suited to Trekking.
- Precise chain movement
- Changes gears smoothly
- Light shift effort
- Using Shimano's classic Double Servo-Panta mechanism
- Versatile design (on/off road)
- Compatible with 28-34T low sprocket
- Maximum Sprocket: 34T
- Minimum Sprocket: 28T
- Aluminium bracket body
- Aluminium plate body
- Steel plate pivot bolt
- Aluminium outer link
- Steel inner link
- Steel inner and outer plate
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Questions & Answers (7) Q & A
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Questions & Answers (7)
Can I use this with 50/34 chainring & 11/40 cassette?
29 Jul 2019
I need to replace a 9 speed Shimano Sora rear derailleur to accommodate a 50/34 chainring & 11/40 cassette. Will this work, with or without a Wolf Tooth Roadlink?
Hi, we think you will need a derailleur hanger extender to make this work. Try our part 46570. Thanks 30/07/19
Would this be a suitable replacement for my elderly RD-M570?
23 Jun 2019

this will be fine.

Will this mech work with SRAM attack shorty shifter and HG 400 12-36 cassette?
17 May 2019
Yes this would be suitable.

Thanks - 17/05/19
will it work with sora 9 speed sti levers?
02 May 2018
Hi there,

Yes these are compatible with 9 speed Sora levers.

What is the maximum cassette with a triple?
02 Jan 2018

With a triple, as suggested the maximum would be 34T.

What is the maximum size cassette this can work with?
01 Jan 2018
The maximum according to shimano is 34t, but with 36t and 40t cassettes out there for 9 speed setups - is this the mech for the job?
Hi there,

It normally depends on the set up of the front chainset, with a single ring this should be fine to be used on a 36-40T - just adjust the B tension screw.

Spare Pulley Wheels
20 Jul 2016
Could you please indicate which replacement jockey wheels are used for this derailleur.
Many Thanks.

The original replacements for this rear derailleur are no longer available but there are a few compatible alternatives. The best match of these would be the jockey wheels from the Altus RD-M370 which are SJS Cycles part 34586.