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.
from Walnut Creek, CA
Date Reviewed: April 2, 2011
Strengths: Awesome a great derailleur for what i love to do.
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.
Weaknesses: 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.
a Weekend Warrior
from Fullerton, CA
Date Reviewed: June 14, 2010
Strengths: Works after several rough spills.
Weaknesses: 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.
Strengths: Looks good; does exactly what it's supposed to do.
Weaknesses: 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.
Favorite Trail: Anything without garbage or pollution
Duration Product Used: 6 months
Purchased At: LBS
Similar Products Used: Shimano Tourney Mega-Range
Bike Setup: Dart 3, Avid BB7's, mostly Deore stuff, 27 speed, and soon to have a FS Kona Four frame.
a Weekend Warrior
Date Reviewed: March 13, 2010
Strengths: It works fine.
Weaknesses: 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.
Bike Setup: My touring bike. Friction shifting.
a Weekend Warrior
from China and UK
Date Reviewed: February 1, 2010
Strengths: Cheap, durable, fine around town
Weaknesses: Glacially slow shifting, bouncy on a trail, imprecise.
So slow, so imprecise, but fine for city riding to commute or go shopping. Do not use for XC riding or you mis-shift at the wrong time and scerw up ascents, or with AM, downhill or freeride you will have chain slap from hell!
Just a few dollars more puts you in to SRAM X7 territory, which is a much quicker derailleur capable of being used for real cycling with less slap, but it can be a little less durable.
a Cross Country Rider
from Santa Barbara CA USA
Date Reviewed: March 4, 2009
Strengths: Solid design
Weaknesses: Minor chain slap on serious terrain, again minor.
I was torn between replacing my XT with an LX or Deore and didn't want to spend the $$$ for XT. I would never skimp on components but rear derailluer's take the most beating on the trails I ride, I want something cheap that works great. I'm pretty happy after three days at the bike park, one solid trail ride and racing at the Kenda Cup last weekend. Shifts great in all conditions except really hard climbs - the shift takes a little longer and isn't so smooth, but for the $ I'm not complaining. As for having it tuned every time you ride like the other reviews, mine seems to work better the more I break it in. I'm happy with the performance and recommend this for anyone looking to save a little $$$ and still have the function and dependability of XT or LX (minus the performance).
a Cross Country Rider
Date Reviewed: January 11, 2009
Strengths: Reliable, precise
Weaknesses: No bling factor, doesn't gives me a valid excuse to change to other RDs
This RD comes together with my bike and I pretty satisfied with it after almost 3000km of riding, 90% road and 10% trails. Initially tuned by bike shops and it isn't very precise, had occasional missed shiftings. Didn't help much tuning the 'H' and 'L' screws either. Then one day, I decide to pull tight the cable attaching to the derailleur and never looked back since. Shifting becomes extremely snappy and precise. Did rapid down shifting and up shifting while speeding down slopes and gears change precisely on the shifter's clicks. And after my self tuning, it had not needed any adjustments for 2 months already.
Bike Setup: GT avalanche 2.0, truvativ stylo crank, da bomb rim, bontragger earl tyres, alivio&deore brake and gear system..
a Weekend Warrior
Date Reviewed: July 9, 2008
Strengths: Easy to install and adjust, shifts well and fast, reliable.
Weaknesses: I could have gotten it cheaper online but thats my fault for not looking around.
I had the stock alivio derailleur but from to much hard ridding it began constantly going out of wack, so i got the deore and i couldn't be happier! just make shore you look online if your going to get this product.
I want to get a new rear deore mech,the m592 or even better the m593.
My question is will any of these two work with my 8 speed cs-hg40 cassette ?
and 8 speed stx-rc shifter ?
[IMG]http://www.retrobike.co.uk/forum ... Read More »
Man, those Shimano drivetrain compatibility charts make it nearly impossible to replace a single component!
Does anyone know if I can get away with using a Deore m510 rear derailleur with an otherwise Shimano 8 speed drivetrain?Read More »
In the shimano manual it says that my XT shifters should only be used with a certain cassette and derailleur. I have the XT deore SL-M740 shifter pods
My rear derailleur is STX.
How well do these work together? Has anyone used this combo?Read More »