Shimano PD-M646 Pedal

3.85/5 (40 Reviews)
Weight : 592 grams MSRP : $80.00


Product Description

  • Dual-sided engagement, dual-sided tension adjustment
  • Uses SM-SH51 (stock) or SM-SH55 multi-release cleat
  • Lower profile than PD-M636, for better obstacle clearance


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

    Reviews 1 - 15 (40 Reviews Total) | Next 15

    User Reviews

    Overall Rating:5
    Value Rating:5
    Submitted by Alrazvee a Cross Country Rider from Singapore

    Date Reviewed: January 29, 2011

    Strengths:    Bombproof, Can be used even with flats, Doesnt require any maintenance, super durable, Adjustable resistance for clipping out, Very fast to clip in because the platform guides your foot into the SPD mechanism.

    Weaknesses:    Not that light but not really a weakness cos its very strong.

    Bottom Line:   
    One of the best pedals I've had! Its sad that Shimano discontinued this model.

    Expand full review >>

    Duration Product Used:   2 Years

    Price Paid:    $30.00

    Purchased At:   Togoparts

    Similar Products Used:   Wellgos, Crankbro Candy, Shimano Deroe XT SPDs and other Shimano ones.


    Overall Rating:5
    Value Rating:3
    Submitted by Rick a Downhiller from Denver, CO

    Date Reviewed: December 28, 2005

    Strengths:    Tough, great traction, easy in and out, look awesome.

    Weaknesses:    None that I've found besides the price and the fact that the idiots at Shimano discontinued this pedal.

    Bottom Line:   
    These pedals kick butt, I've had NO problems with them at all. I smash them into rocks, logs and the random unlucky small animal and I've NEVER had a problem. Never lost a screw or spring or end cap off either of my sets of DX's.

    These people who say the "commute" with these pedals are nuts. They probably have the "set screws" out all the way so they fell out and lost the springs or something like that. This will happen with most pedals if you have the tension set too light.

    Expand full review >>

    Favorite Trail:   Any Down Hill Trail

    Duration Product Used:   More than 3 years

    Price Paid:    $65.00

    Purchased At:   online

    Similar Products Used:   You name it

    Bike Setup:   Super 8 and a Schwinn S-10 All mountain

    Overall Rating:5
    Value Rating:5
    Submitted by mtnfiend a Weekend Warrior from Pasadena, CA

    Date Reviewed: April 28, 2005

    Strengths:    Durability

    Weaknesses:    Weight

    Bottom Line:   
    I purchased these things back when this style of pedal just came out. It was a long time ago, I'd say it was 1995. Granted I stopped ride for several years. However I've been riding agressively for 4 years and use these pedals on every ride. They are still running strong. The pedal still spins as if it was new.

    Expand full review >>

    Duration Product Used:   More than 3 years

    Price Paid:    $80.00

    Purchased At:   The Bike Source


    Overall Rating:2
    Value Rating:1
    Submitted by jeanne a Weekend Warrior from Calgary, AB

    Date Reviewed: March 6, 2005

    Strengths:    Looks robust.

    Weaknesses:    For want of a minor overhaul part the product is useless.

    Bottom Line:   
    Same problem as an earlier reviewer. The end caps came out of both pedals at some point in my Calgary commute 18 months ago and I lost both sets of springs and bushings. At 130 lbs I am not hard on this product and sadly I hardly ever leave pavemen, I get regular tuen-ups. My LBS overhauled and replaced the missing parts the left side in Oct. 2004 for $25 and ordered parts for the right pedal. Eight months later I find Shimano has not been sending out spring pedal replacement parts for months. We have many great bike shops in Calgary and none seem to be able to get these parts. I'm sure I won't be replacing this product with another expensive non-repairable Shimano product. I did get 3 years of trouble free service, the pedal is in great shape otherwise, just un-intelligent maintenance design on the engineer's part I guess. I can't imagine what would happen with this product falling apart like this in a real race. Buy these if you can find them for under $30, already have a set, and need the parts?
    ps: terms of use link is out of service on this submission page.

    Expand full review >>

    Favorite Trail:   Powderface

    Duration Product Used:   More than 3 years

    Price Paid:    $160.00

    Purchased At:   Calgary Cycle

    Similar Products Used:   Shimano M505; Wellgo $20 clipless pedals.

    Bike Setup:   Brodie 1998 Torque steel frame c/w Shimano LX commuter bike.

    Overall Rating:1
    Value Rating:3
    Submitted by chuck cypert a Weekend Warrior from dallas, tx usa

    Date Reviewed: February 7, 2005

    Strengths:    It looked like a good setup: heavy duty design, built for severe abuse, SPD cleats.

    Weaknesses:    Expensive.

    Weak. One of these pedals is falling apart after less than a year of commuting 9 miles every day. I clipped the occasional curb with them but they have been nothing like abused. The end cap on the right one came off and the spring and bushing went somewhere and now the cage is all wobbly. Suckomatic. I go about 180 lbs. and take it easy on my stuff, all I do with these is ride to work and back on paved roads. These pedals were not mistreated and for the price they sure should have fared better..


    Bottom Line:   
    I am left unimpressed. I need to be clipped to the bike and I need pedals that are easy to hit when accelerating from a traffic light. These did that but one is falling apart after maybe 100 rides. I'll have a pair of 545s next, I think, as soon as the right one falls apart the rest of the way or starts making noise.

    Expand full review >>

    Favorite Trail:   Old Ore Road

    Duration Product Used:   1 Year

    Price Paid:    $65.00

    Purchased At:   eBay

    Similar Products Used:   Shimano 424s & 545s and no complaints.

    Bike Setup:   Commuterrorista M1A1 Main Battle Bike. Old steel mountain bike frame with Phil wheels and 1x9 drivetrain, full racks and panniers for hauling all my crap to work and back.

    Overall Rating:5
    Value Rating:4
    Submitted by Matt a Weekend Warrior from Ontario

    Date Reviewed: May 25, 2004

    Strengths:    Very durable. and you can either go clipless or just flat shoes.

    Weaknesses:    I think I payed a bit much for them but it was in canadians dollars so it might be right. they are kinda hard to get out of with clipless shoes and if you crash and they scratch your leg you definetly going to BLEED.

    Bottom Line:   
    These pedals are awsome and to those people who say you can only use them with clipless shoes your wronge. I always use these pedals with out clipless shoes and have never had any porblems because they teeth help keep my shoes on. Just remeber to wear shin pads cuz these pedals will make you bleed. Diding give it 5 out of 5 chillis on the value rating because they cost alot!!!

    Expand full review >>

    Favorite Trail:   Kelso Extreme

    Duration Product Used:   1 Year

    Price Paid:    $200.00

    Purchased At:   Cycle Path

    Similar Products Used:   just plain shimano clipless pedals and regular shimano flat pedals

    Bike Setup:   2003 Rocky Mountain ETSX-30 Stock

    Overall Rating:4
    Value Rating:4
    Submitted by Marc a Cross Country Rider from Calumet, MI

    Date Reviewed: March 17, 2004

    Strengths:    Easy to engage, have taken a number of hits and no problems.

    Weaknesses:    One time I got them pretty caked with mud and had difficulty engaging, could still pedal though.

    Bottom Line:   
    I have enjoyed using these. I would recommend these to people just starting with spd. For me, they were easier to engage than the pedals that came with my 6500 and the ritchey's that were on the tandem. They are heavier and for a cross county enthusiast who is more concerned with weight they would probably not be the best choice. Durability has been good for us, a number of times they have been banged on the rocks with our tandem and still keep on going.

    Expand full review >>

    Favorite Trail:   Anything in the Keweenaw

    Duration Product Used:   2 Years

    Purchased At:   70

    Similar Products Used:   Ritchey, other shimano spd

    Bike Setup:   Trek 6500 stock, Cannondale MT2000 Tandem, stock

    Overall Rating:2
    Value Rating:3
    Submitted by Craig a Weekend Warrior from Alexandria, VA, USA

    Date Reviewed: February 23, 2004

    Strengths:    Price point was acceptable; looked nice; had a durable appearing platform.

    Weaknesses:    Platform wasn't that useful due to the SPD placment and angle. Weight, but if you're buying this type of pedal, you expect that. I used these for offroad riding on moderately technical singletrack and found these hard to disengage resulting in multiple falls. Not great for confident riding. Given today's options, I would not recommend these. I don't think these are best for muddy, or adverse trail conditions.

    Bottom Line:   
    I'm sure there's worse out there, but these are not the best pedals. I'm actually steering away from Shimano pedals in general, due to price and overall performance. I liked the Time Z's much better, and these were much easier to engage and disengage in adverse conditions. I can not recommend this item.

    Expand full review >>

    Favorite Trail:   Schaeffer Farms, MD

    Duration Product Used:   3 months

    Price Paid:    $80.00

    Purchased At:   Online - Unsure

    Similar Products Used:   Time Z - like these alot better; thinking about the Mallet C's.

    Bike Setup:   Current trail bike is a Giant NRS2, everything still stock w/ the exception of the tires (now Panaracer Fire XC Pro's), and saddle (Peformance brand Forte SL Pro). NiteRider lighting system - handlebar and helmet mount, 12W.

    Overall Rating:5
    Value Rating:5
    Submitted by Nikolas a Weekend Warrior from Greece

    Date Reviewed: January 5, 2004

    Strengths:    BOOMPROOF.This pedals are a tank.unmached quality

    Weaknesses:    a bit heavy-but hey the worth it

    Bottom Line:   
    If you got $80 for pedals dont look anywere else.Nothing can mach theese.The survived crashes,rocks,mud,water,dirt,dust,jumps-everuthing.Very good function and adjustability.Top quality bearings.Very easy maintenance.If i only coult rate them 10 chilis

    Expand full review >>

    Duration Product Used:   2 Years

    Price Paid:    $80.00

    Bike Setup:   gt pantera frame,judy '02sl,lx-xt,rithey-icon componets

    Overall Rating:5
    Value Rating:5
    Submitted by Dave a Downhiller from Fort Wayne, IN

    Date Reviewed: January 4, 2004

    Strengths:    SuperStrong and durable, work like everyother decent clipless pedal

    Weaknesses:    the placstic insert that holds the axle in the pedal

    Bottom Line:   
    These pedals do exactly what they are supposed to. You only here two complaints about them. One is the plastic insert that holds the axle in the pedal breaking. It is a legitimate complaint but one that has apparently been addressed by shimano. The other complaint is that you can't stand on the body when not clipped in. This is crap. The pedal is not designed to be used without clipless shoes. The body serves several functions, it protects the pedal mechinism, and it allows for a platform to stand on if you come inclipped and do not have the time to clip back in at that second, and in this situation the body seems to help guide the cleat back in. But it is not designed to be used without a clipless shoe. Anyone who is complaining that they can't use a regular shoe is using the pedal imporperly and that review should be ignored.

    These pedals have held up really well through countless crashes. They reasonably well in mud, but down't work so well if the shoe is packed up with snow. This might be a function of the shoe as I have only used one shoe in the snow with these pedals.

    As a testament to their strength, in the spring I jumped off the loading dock at work and landed really flat. I thought I bent the axles so I ordered a new pair and put them in but the bike was still messed up. It turns out I hav twisted the crank arms. I put the old axles back in with the new cranks and they were perfect. My Cranks had failed before the pedals.

    The bearings spin smoothly and have required almost no maintance in the three years I have had them.

    Expand full review >>

    Favorite Trail:   Not here

    Duration Product Used:   More than 3 years

    Purchased At:   Shh, Employee purchase ;)

    Similar Products Used:   Other shimano clipless pedals, coda(wellgo) pedals

    Bike Setup:   Specialized Enduro hardtail

    Overall Rating:2
    Value Rating:3
    Submitted by C-dog a Downhiller from Hamilton, MT, USA

    Date Reviewed: November 18, 2003

    Strengths:    Good clipless pedal, positive engagement, strong axel and bearings no maintence required

    Weaknesses:    I bought it for the platform but it's frickin useless.

    Bottom Line:   
    These pedals are tough as nails and take a beating, they work very well clipped in. but the platform is useless except for maybe protecting the bodey of the pedal, if you are trying to ride these uncliped watch out the are slippery and if you're wearing cleats they will just slip right back into the clips. There has got to be a better way of doing this concept comeon shimano

    Expand full review >>

    Favorite Trail:   Blue Mountain

    Duration Product Used:   2 Years

    Price Paid:    $70.00

    Purchased At:   LBS

    Similar Products Used:   most of them

    Bike Setup:   I've had them on a couple of bikes but right now they are in the garage on the shelf

    Overall Rating:1
    Value Rating:1
    Submitted by Ricardo Parra a Racer from Chillan, Ñuble, Chile

    Date Reviewed: October 18, 2003

    Strengths:    The pedals are beauty ¬¬, mmmmmmmmm, they clip in & out like any clipless pedal... they spin freely, like they would have sealed ball bearing.... but it doesn't matter when you are over 100 RPM....

    Weaknesses:    Bad design, plastic pieces with metalic pieces who are exposed to high stiffness....

    There are only one model with the LOCK BOLT in plastic... and only me buy that!!!... i feel like someone thief from my pocket my money....


    Bottom Line:   
    ufffff.... where can i start...

    The pedals are god until you must service them... when i open my pedals, a plastic piece (that in the new 646 it's metalic and doesn't require special tool)THE PLASTIC LOCK BOLT when i open the left pedals, this piece was broken!!!!, i had try to extract and it broke again, only with my hands, no wrench!!!!, and the half of this piece it's inside, so... the pedal it's ready for the trash.... after that, i open the left pedal, the same piece have spin freely, it hasn't thread!!!, i don't know why, i put the tool rightly and i loose to the right direction....

    well...
    There are two pedals, with less than a year, in my trash!!!... now, and in the future, i will dissasembly completely a pedal before buy someone....

    in this moment, i have wellgo clipless pedals, of the half price, and they work nicely....

    Expand full review >>

    Favorite Trail:   BMX chillan track...

    Duration Product Used:   3 months

    Price Paid:    $90.00

    Purchased At:   January, 2003

    Similar Products Used:   Wellgo WPD-804

    Bike Setup:   DiamondBack Reactor 24" Profile 177 CRANKS

    Overall Rating:3
    Value Rating:4
    Submitted by Charles a Cross Country Rider from Ann Arbor, MI, US

    Date Reviewed: October 6, 2003

    Strengths:    Great stable platform. Really sturdy.

    Weaknesses:    Really hard to clip in when muddy. Kinda heavy.

    Bottom Line:   
    These peddals have a great stable platform that is awesome when you can't or don't want to clip in. I use them on my XC bike because I wanted something that I could use without cleats. They do the trick, but they are kinda heavy for a race bike. The one downside is that it's nearly impossible to clip back in if you've had to hop off when it's muddy. The good thing is that even if it's muddy and you're not clipped in, your foot isn't going anywhere. The platform is great. They're good foe XC even though they're a little heavy and theyre great for DH/freeride. I'm probably going to end up getting some Times though because of the mud factor.

    Expand full review >>

    Duration Product Used:   3 months

    Price Paid:    $69.00

    Purchased At:   supergo.com

    Similar Products Used:   Normal shimano spd

    Bike Setup:   Trek 8500, XTR rear, XT front, XT shifters, Manitou Mars fork, Rolf Dolomite Wheels, Panaracer Fire XC tires, Selle Italia flite saddle, Qrank riser bars

    Overall Rating:4
    Value Rating:5
    Submitted by David H. a Weekend Warrior from Santa Barbara, CA

    Date Reviewed: September 24, 2003

    Strengths:    Everything, especially the good grip when not riding SPD, except...

    Weaknesses:    Paint scratches off REALLY easy, heavy

    Bottom Line:   
    Great pedals. I would recommend to anybody not completely weight conscious. If you want a pedal which you can ride with or without clipless and is an overall great pedal, get a pair!

    Expand full review >>

    Duration Product Used:   1 Year

    Price Paid:    $70.00

    Purchased At:   Price Point

    Similar Products Used:   All sorts

    Bike Setup:   Giant VT2 with Fox Talus, Mavic 717, mostly XT

    Overall Rating:2
    Value Rating:2
    Submitted by top jimmy a Weekend Warrior from new england

    Date Reviewed: July 7, 2003

    Strengths:    Durable exterior cage. Nice platform to clip out of.
    Accept multi-angle release cleats. Relatively easy to get in and out of.


    Weaknesses:    Some of the INTERNAL PARTS ARE MADE OF PLASTIC...which break (of course). You need a "special" shimano wrench to open the pedal and do the internal maintenance work.
    >>Order a small shimano part...wait over a week and pay through-the-nose for a small piece of plastic.


    Bottom Line:   
    They work great until they need maintenance. Which happened to me about 3 months in to owning them. Once you get the special wrench (for maintenance), easy to open them up and fix. BUT, you need the parts! LBS orders then and you wait over a week to get them...plus you pay full LBS prices for small plastic pieces.

    Now, the real question is...
    WHY THE PHUCK DO THESE PEDALS HAVE *easy to break* PLASTIC INTERNAL PARTS????
    Trying to save a few grams???
    ...These peadls are supposed to be used for DOWNHILL...

    It is very disapointing to hold a vey solid feeling pedal in your hand and know that the internal parts are not so durable.

    Expand full review >>

    Favorite Trail:   humm...so many to chose

    Duration Product Used:   1 Year

    Price Paid:    $65.00

    Purchased At:   LBS

    Similar Products Used:   Cheapy MTB clippless (worked well). Other shimaon clipless.

    Bike Setup:   awesome, phat, plush ride

    Reviews 1 - 15 (40 Reviews Total) | Next 15

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

     

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