Shimano Deore Rear Der Derailleur

DESCRIPTION

The versatile Shimano Deore rear derailleur is now available in an economical version.

USER REVIEWS

Showing 1-10 of 112  
[Sep 12, 2015]
brad
Cross Country Rider

OVERALL
RATING
2
VALUE
RATING
2
Strength:

Absolutely none.

Weakness:

Everything.

I will not touch another Shimano product after dealing with this derailleur. I have wasted hundreds of dollars blaming other components for Shimano's insufficiencies.

The Deore constantly ghost shifts. It is most observed on grinding uphills or rough downhills, but commonly does it on smooth, flat sections. Nothing destroys your confidence on a trail more than a ghost shifting derailleur.

You must ride in perfectly dry conditions. This thing loses its mind if it gets wet.

The Deore is extremely slow. You better know your trail because you have to downshift an 1/8 mile before an uphill. Not only does it take an eternity to respond to your trigger, it's also so horribly inaccurate that you must plan to do some random down and up shifting to end up in the gear you want.

The chain slap. O....M....G....THE CHAIN SLAP. Just go out to your garage with an old chain and start whipping the crap out of your bike with it. That's what it's like riding with a Shimano derailleur.

You must tune this derailleur after every 6 miles. No joke. It will shift okay (for a Shimano) for the first 6 miles, but then...I don't know what happens...it just starts doing whatever it wants.

You're better off riding a single speed than trying to make this thing work. Shimano makes me question why I mountain bike.

[Aug 15, 2014]
bob

OVERALL
RATING
1
VALUE
RATING
2
Strength:

none

Weakness:

Slow shifting, inaccurate shifting, chain slap, does not stay tuned

The Deore belongs nowhere near a mountain bike. It's slow and It can't handle bumps, torque, and even the tiniest bit of mud or water. I've given it the benefit of my doubt for the last year thinking that I just need to tune it better, but no, it simply isn't a good product.

It is guaranteed to shift when you don't want it to. Steep uphill? It's going to upshift. Fast, rough downhill? It's going to downshift. But when you ask it to shift? It's no where to be found.

And I can't believe the amount of chain slap I get. If I don't replace it, I think the chain will eventually eat through my stays.

I feel like I have to tune it after about 3 rides. It shouldn't be that way.

[Sep 13, 2011]
extremedave
Weekend Warrior

OVERALL
RATING
1
VALUE
RATING
2
Strength:

Fairly reliable.

Weakness:

Shifting.

Bike came with the Deore M592 long cage as new. Simply, this derailleur is not for aggressive trail use. Up and down the street, fine. In rough sections, I experienced heavy chain slap and noise and many instances of self shifting. The unit shifts quite slowly and will not shift under anything but the lightest load.
Tried adjusting the derailleur and it did get better but overall, mostly disappointing. Ended up having to sacrifice quality of shifting on the smaller cogs to have reasonable function in the larger. Only plus was it did take a few pretty good rock hits quite well.

After changing the M592 for a SLX, the difference was dramatic. I can shift whenever I wish, even under fairly heavy pedal load. The chain slap has disappeared and it changes gears with authority. Also improved is the indexing of each individual gear, it hits exactly on the next cog. Swap the Deore out, asap. You'll be glad you did.

Similar Products Used:

Shimano SLX

[Jun 24, 2011]
AWDfreak
Weekend Warrior

OVERALL
RATING
3
VALUE
RATING
5
Strength:

Pretty strong, great value

Weakness:

Flops around during jumps or bumpy conditions

For those tired of having to replace their rear derailleurs (that are below the Shimano Alivio lineup), the Shimano Deore offers a fresh breath of air.

It's shifting speed is OK, but this is a derailleur worthy of being considered a mountain bike component!

Recommended for those who adventure on trails, but not at very high speeds. It handled my mud abuse pretty well.

Similar Products Used:

crappy Shimano Altus, crappy Shimano Acera, Shimano Alivio, Shimano Deore XT

[Apr 02, 2011]
Mdcbiking
Downhiller

OVERALL
RATING
5
VALUE
RATING
5
Strength:

Awesome a great derailleur for what i love to do.

Weakness:

none

Great derailleur, i could use it for the rest of my life. It has never let me down and i go pretty fast. If you are in need for a nice derailleur, buy the Shimano Deore it is AWESOME!!! I paid $50-60 dollars and i think it's worth about $100. If you are debating on getting this or the Sram x.5 this is better. Again great derailleur.

Similar Products Used:

Sram x.5, Shimano Alivio (horrible)

[Feb 24, 2011]
Joe DePalma
Weekend Warrior

OVERALL
RATING
5
VALUE
RATING
5
Strength:

Crisp shifting, easy adjustments, surprisingly durable

Weakness:

None so far - worked right out of the box and has about 1000 miles in it with adjustments needed only twice.

This has held up well. No ghost shifts, shift well under full load (I'm 5'8" 215 lbs), and has taken some falls on the ice without missing a beat. I don't do hardcore XC, DH, or FR, but for medium trails and road commuting this cannot be beat. And at the price I paid for it new ($15 for a 2010 model RD-M591) you won't find better.

Similar Products Used:

Shimano Altus, Shimano Acera, SRAM X.3

[Nov 18, 2010]
Utu
Cross Country Rider

OVERALL
RATING
4
VALUE
RATING
4
Strength:

Strong, low profile tech, shift accurately, doesn't skip when bunny hopping :)

Weakness:

Hard to adjust

Satisfaction! so far

Similar Products Used:

Alivio RD, Sram X5

[Jun 14, 2010]
talavera
Weekend Warrior

OVERALL
RATING
3
VALUE
RATING
3
Strength:

Works after several rough spills.

Weakness:

Cant seem to stop self shifting under pressure. imprecise shifting and slow.

It worked well out of the box. After about 50 miles it started having trouble shifting. After readjusting for cable stretch and breaking in it ran fine for another 20 miles. Now it refuses to down shift unless I really crank on the shifters, and after it does, it jumps around the cassette (usually at the critical part of the climb when I'm putting the most pressure on it). Ive broken down and had it professionally adjusted and it will be out of tune after 5 or 6 miles. It is definately on the top of my replace list. if your riding urban or super mild fire roads, I'm sure its ok. if you plan on anything more, look into something more reliable.

Similar Products Used:

SLX, SRAM X9

[Apr 26, 2010]
Pollution Warrior
Weekend Warrior

OVERALL
RATING
5
VALUE
RATING
5
Strength:

Looks good; does exactly what it's supposed to do.

Weakness:

Maybe just that it doesn't have a barrel adjuster. Of course the shifter has one, but having two would give a level of adjustability that might make trail-side adjustments easier if needed. But then weight weenies might not want it.

You can definitely get flashier stuff, but I wouldn't see the point. A derailleur either works or it doesn't. This one works fine. Spending more money wouldn't change much.

Similar Products Used:

Shimano Tourney Mega-Range

[Mar 13, 2010]
helloemor
Weekend Warrior

OVERALL
RATING
3
VALUE
RATING
5
Strength:

It works fine.

Weakness:

Heavy, a bit sloppy on occasion.

I've ridden it many, many miles over many different roads and conditions. It always shifts for me. Occasional auto-shift issues, but I can't say for sure that the rear mech causes that. It is, however, very heavy. My Cyclone MKII touring mech, designed 30 years ago, works just as well, looks better, and weighs about half as much.

Similar Products Used:

Tiagra, Suntour Cyclone, Cyclone Mk II, Deore DX.

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