Shimano SLX FC-M665 Crankset

4.73/5 (15 Reviews)
MSRP : $139.98


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Product Description

  • 2 tone colored crank arm
  • High rigidity crank arm
  • Accurate chainline construction by 2-piece structure
  • Honeycomb designed bash guard absorbs impact


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Reviews 1 - 15 (15 Reviews Total)

User Reviews

Overall Rating:5
Value Rating:5
Submitted by Patrick a Weekend Warrior

Date Reviewed: July 4, 2013

Strengths:    Strong, Stiff, Cheap. Shifts great. Light enough

Weaknesses:    None really. I guess you might not impress any bike snobs, but that's about it.

Bottom Line:   
Everything you want in a crank. Shifts better than the XT I had on before it. I didn't think a plastic bash guard would hold up that well but this thing can take some abuse. My cranks have a tendency to develop creaks, but after three years this thing is still quiet. I hope they keep making these the same way, I couldn't be happier.

Expand full review >>

Favorite Trail:   Taconic 909

Duration Product Used:   more than 3 years

Purchased At:   Online

Similar Products Used:   Shimano XT, 90's Cannondale CODA,


Overall Rating:5
Value Rating:5
Submitted by MonkeyC a Weekend Warrior from Peekskill, NY

Date Reviewed: December 18, 2010

Strengths:    STRONG, light, really nice/durable finish, easy install & adjustment.

Weaknesses:    NONE!

Bottom Line:   
Shimano says this crankset is 100% stronger than XT. It seems plenty strong to me - I don't notice ANY flex or weakness. It's very light - especially the BB & arms. I'm surprised by how well the plastic bashring holds up to the rocks I've been hitting, but it does, so it's fine by me. It shifted very smoothly when I had a front der, but have since switched to a 1 x 9 set up, via chain standwich, which works very well. The 22/36 set up just didn't work for me; so now I just run a 32T, which is perfect for the riding I do - some AM, some XC racing. This crankset really has been flawless; which is especially noticeable b/c everything else on my bike has problems ;-)

Great product. Amazing value.

Expand full review >>

Favorite Trail:   Stinger & Blue Mt

Duration Product Used:   1 Year

Price Paid:    $180.00

Purchased At:   Yorktown Cycles

Similar Products Used:   XT, Truativ

Bike Setup:   Maverick Durance

Overall Rating:5
Value Rating:5
Submitted by alexkraemer a Weekend Warrior from SLC, UT

Date Reviewed: October 11, 2010

Strengths:    Stiff as all get up
Chain rings shift like BUTTA


Weaknesses:    None really. Bashguard is heavy and could be removed, but if you're riding such that you need a bash, you're prolly not counting grams...

Bottom Line:   
KICK-ASS CRANKSET! When paired with the SLX FD, this thing shifts in spite of my worn-down drive train, misadjusted FD, and other general installation mistakes. Shifting is super smooth and the ratios work out perfectly. Stay in the 22 when climbing (or as a 36T bailout) and then switch to the 36T on the way down. Gears are more useful than the 26-39 setup from Sram. Chainrings are heavy (steel vs AL) but the shifting ramps are present on both the 22T and 36T and the combination is flawless.

Expand full review >>

Favorite Trail:   Bootleg Canyon

Duration Product Used:   6 months

Price Paid:    $150.00

Purchased At:   Jenson

Similar Products Used:   XX chainring setup (26-39)

Bike Setup:   On my Big Mama

Overall Rating:5
Value Rating:5
Submitted by Ride_2_Fast a Racer from Wash, DC

Date Reviewed: August 3, 2010

Strengths:    makes for a good chainline, good ratios -run it on 2x9 race rig without bashguard and stay most of your time in 36t; great clearance compared to 44t triple

Weaknesses:    a bit heavier with bashguard (but bashguard is realy beafy fo the those one that want it).. can be removed and save 200g

Bottom Line:   
use either with bashgaurd (a bit extra weight) or remove the bashguard (200 gramms) and get lightweight double crankset (about 800 gramms)... run that on your bike for improved chainline and with 22/36 I can spend 95% in big 36t chainring and shift just on cassette. works great.

Expand full review >>

Favorite Trail:   Shaeffer farm

Duration Product Used:   3 months

Price Paid:    $160.00

Purchased At:   MTBR classified, Eba

Similar Products Used:   ..none

Bike Setup:   RIP9

Overall Rating:4
Value Rating:4
Submitted by PVR a Cross Country Rider from Vernon, B.C. Canada

Date Reviewed: June 16, 2010

Strengths:    Strong, smooth shifting, lightweight compared to my old triple

Weaknesses:    expensive, bash guard a little cheesy looking. Need to spend time tweaking your front derailleur to get the shifting just right.

Bottom Line:   
A good upgrade from a triple for trail riders. You have to get used to the new ratios (22 36t)but you quickly find the right gear after a few rides. Chain line is much better and the added ground clearance and bash protection is great.

Expand full review >>

Favorite Trail:   Larch Hills Traverse

Duration Product Used:   Less than 1 month

Price Paid:    $200.00

Purchased At:   LBS

Similar Products Used:   Truvativ Stylo triple, Shimano Deore triple

Bike Setup:   Spec Stumpy Comp

Overall Rating:5
Value Rating:5
Submitted by stubs a Cross Country Rider from Liverpool, England

Date Reviewed: March 24, 2010

Strengths:    Bombproof. The chainrings have only lost a bit of the anodising after 6 very gritty months. The BB is spinning as sweet as the day it was fitted. Stiffer than a very stiff thing from stiff town.

Weaknesses:    Could be lighter its not the heaviest Twin and Bash out there but the bash ring is very heavy.

Bottom Line:   
If I ever break any part of this set I wont be worrying because the crash will certainly have killed me. I will never go back to a triple ring set on my MTB

Expand full review >>

Favorite Trail:   Penmachno

Duration Product Used:   6 months

Price Paid:    $160.00

Purchased At:   Merlin Cycles

Similar Products Used:   Shimano XT, Shimano Deore, Shimano LX, Truvativ FireX

Bike Setup:   Commencal Super 4, Reba forks, Avid Elixir brakes, XT gears, Easton Finishing kit, XM 719 rims on XT hubs

Overall Rating:5
Value Rating:5
Submitted by NMPhi767 a Weekend Warrior from Phoenix, AZ, USA

Date Reviewed: February 8, 2010

Strengths:    Stiff, not light, but its not a porker either. The bashring does its jobs.

Bottom Line:   
These are a great crank for the price and they get the job done. I have had zero issues with them and the bottom bracket.

Expand full review >>

Favorite Trail:   Holbert

Duration Product Used:   1 Year

Price Paid:    $130.00

Purchased At:   Ebay? Jenson USA?

Similar Products Used:   FSA Alpha and Gamma Cranks, Truvativ cranks, Saint Cranks

Bike Setup:   Titus El Guapo

Overall Rating:3
Value Rating:3
Submitted by ruib99 a Cross Country Rider

Date Reviewed: August 28, 2009

Strengths:    2.2 kilogram. Lighter than DEORE and FC-M542 Hollowtech.

Weaknesses:    The allen bolt of its left crank, it is very soft.

Bottom Line:   
The allen bolt of the left crank arm too soft.

Expand full review >>

Favorite Trail:   XC

Duration Product Used:   Less than 1 month

Price Paid:    $120.00

Purchased At:   Oro Cyclemart

Similar Products Used:   FC-M542 Hollowtech 2


Overall Rating:5
Value Rating:5
Submitted by ozzybmx a Weekend Warrior from Australia

Date Reviewed: August 25, 2009

Strengths:    Stiff , looks great once you get rid of the hideous bashring, Cheap, solid construction with steel pedal inserts . If i ever break this i will buy another , and i can see that happening.

Weaknesses:    None

Bottom Line:   
Cant gett a better crank for anywhere near the price, BB is crap as usual .... just change it when you get the cash . The money you have saved on this crank over the XT ot RF AM will buy you a hope ceramic BB . Ditch the 150g bashring for a light one and you have a crank the weight of an XT with twice the strength.

Expand full review >>

Duration Product Used:   6 months

Price Paid:    $180.00

Purchased At:   online

Similar Products Used:   many different shimano cranks , tried raceface.

Bike Setup:   AM with all top bits , cheapest part is my SLX crank due to pure ability.

Overall Rating:5
Value Rating:5
Submitted by philly cheese a Weekend Warrior from Santa Fe, NM

Date Reviewed: July 18, 2009

Strengths:    Strong, Light, Looks Cool

Weaknesses:    The Bashguard is heavy and dumb-looking

Bottom Line:   
Really good crankset. BB is smooth. Crank is stiff. replaced the bashguard cause IMHO it looks dumb and irs eally pretty heavy. One thing to note - the triple chainring, besides not having pedal inserts is not the same crank as the double. If you look close at the spider, the double's is thicker and sturdier. My wife has the triple and its slightly more flexy.

Expand full review >>

Duration Product Used:   3 months

Similar Products Used:   truvativ holzfeller

Bike Setup:   03' SC Bullit

Overall Rating:5
Value Rating:5
Submitted by sickspeed16 a Downhiller from Titusville,NJ,USA

Date Reviewed: July 15, 2009

Strengths:    Stiff, durable. Not really much more you need to say when it comes to a AM/FR oriented Crankset. It's about 100grams less than the saint and I'd be willing to bet just as stiff. Just took the bike to Diablo to race and it put up with what was arguably the narliest course to date.

Weaknesses:    Got nothin.

Bottom Line:   
If your looking for a relatively cheap crankset that can handle whatever you throw at it, and still hang just on the light side, gotta get one of these.

Expand full review >>

Favorite Trail:   The rocky ones

Duration Product Used:   Less than 1 month

Price Paid:    $100.00

Purchased At:   Chainreaction.com

Similar Products Used:   Truvative garbage

Bike Setup:   Sanction...built for abuse

Overall Rating:5
Value Rating:5
Submitted by Ojai Bicyclist a Downhiller from SoCal

Date Reviewed: July 13, 2009

Strengths:    Best bang for your buck out there. Shimano BBs last forever, their interface is MUCH better than everyone else's (cough TruVativ and Raceface), and they are the perfect blend of strength (steel pedal inserts) and weight (only a few grams heavier than XTs). If you have a 68/73mm BB, these are THE best cranks you can get.

Weaknesses:    None

Bottom Line:   
These are money. Everything a DH'er needs but nothing they don't.

Expand full review >>

Duration Product Used:   3 months

Similar Products Used:   XT, XTR, TruVativ, etc.

Bike Setup:   Morewood Izimu, Boxxer Team, Sram X0, DT 5.1, Hope hubs, etc.

Overall Rating:4
Value Rating:5
Submitted by drstepi a Weekend Warrior from Kielce,Swietokrzyskie, Poland

Date Reviewed: March 31, 2009

Strengths:    design, finish and quality, when out of the box looked soo nice made me reluctant to get it dirty, after 6 mionths of some abuse looks still good. Wiegh is a big pro over the competeing brands, I'd say the bash guard though plastic handles it's duties unless hit hard on a rock (mine got hit in dirt and on wood)

Weaknesses:    Not sure about the whole fittin system and bushings quality, but that was only heard from third parties, my bushings are ruuning free so far
can be a hassle to mount with ISCG 05 chaingurad and some types of front der.


Bottom Line:   
it's a good value (in wiegh to price and strengt categories) product aimend at all mountain market, so a very demanding one.
And when used in that manner it is a good choice, will last long . I punish my bike and myself on some light DH/FR courses too, and my style is go up just to go down and enjoy it.
So for such light punishment it serves good and deserves 5 stars for that, 3 for some issues in the BB area (check weaknesses)

Expand full review >>

Favorite Trail:   any

Duration Product Used:   6 months

Price Paid:    $115.00

Purchased At:   allegro

Similar Products Used:   shimano, truvativ, sugino, sachs

Bike Setup:   2006 Gemini with 2007 bomber all mnt z1 sl, luoise brakes, some mix of shimano deore/alivio/xt and stx(!) tioga cokpit, ns hubs and pedals, mavic d521 and DM24 rims, conti tires

Overall Rating:5
Value Rating:5
Submitted by michaelblade a Weekend Warrior from Solag,Calif. USA

Date Reviewed: December 8, 2008

Strengths:    Easy to instal.But I'm a mechanic.Shifts smooth with older XT front D-Railer.I run an 8 spd XT R cog. New Sram 850 8 spd chain. SLX worked fine on the test run.Very lightweight.

Weaknesses:    Plastic bash guard.But just the look of it. It looks like it will absorb impact smoother than a metal guard but I'm not sure how well it will protect that exspensive chainring.

Bottom Line:   
I think this setup is good for 180 pound and under riders.I mean bombproof.That is just my opinion.If I was heavier than 180 I would go with Saint.Shimano makes good stuff.And this crankset appears to be just what I need.It does shift well and seems very strong. A year from now I'll give an update.

Expand full review >>

Favorite Trail:   Roller Coaster

Duration Product Used:   Tested or demo'ed only

Price Paid:    $145.00

Purchased At:   Secret Ebay source

Similar Products Used:   XT 22/32 with Race Face bash.LX 22/32 with RF bash.





Bike Setup:   2006 GT I Drive 5.XTR RD and 8 spd dual shifters. XT FD. Heavy duty FR wheels.Kenda stickies 2.4 . Drop Off 2 20mm axel.Raceface Diablous 70mm stem.Ergon grips.Small frame.Stock Shimano mech disc brakes.XTR shift cables.WTB Speed V seat.

Overall Rating:5
Value Rating:5
Submitted by meehow8 a Cross Country Rider from louisville, ky

Date Reviewed: October 24, 2008

Strengths:    good gearing, solid design

Weaknesses:    plastic bash- but it's beefy and keeps the weight down

Bottom Line:   
This crank is beefy and pretty light too. The gearing is on the money. I'm happy shimano kept it real and came out with something for those of us who don't want a triple. It's perfect for those that run a bash and need a solid purpose-built crank. The splines are smaller and tighter than other 2-piece designs which tend to loosen and strip. The spindle secures like a threadless stem- not with a single bolt like other brands. I like the torx chainring bolts. It's stiff and the design should be super durable. Obviously, it just came out and time will tell. I think they got it right with this one. However, we'll see if the plastic bash is the weak link. It does keep the weight down and seems to be chunky enough. FSA and Shimano are where it's at if you want durability and don't want to have a crank arm come loose on you at the worst time.

Expand full review >>

Favorite Trail:   where's the mountain?

Duration Product Used:   Less than 1 month

Price Paid:    $240.00

Purchased At:   shop

Similar Products Used:   fsa v-drive, truvativ, sugino, shimano

Bike Setup:   mountain cycle zen w/ 5th air, X9, slx ft.double der., elixir r 185/160, mavic 321s, thomsons

Reviews 1 - 15 (15 Reviews Total)

Review Options:  Sorted by Latest Review | Sort by Best Rating

 

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