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Shimano M640 Zee Shift Lever

USD$19.99 17% off USD$23.99 msrp
Item #: SL245A00
USD$19.99 17% off USD$23.99 msrp
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Shimano M640 Zee Shift Lever

Zee is Shimano’s new line of Gravity-specific components, designed and priced for those of us who do not have multi-million dollar sponsors. Specifically designed as a rear-only lever for 1x10 drivetrains, the M640 Zee shifter features crisp, consistent Dyna-Sys shifts and 2-way release. The Zee shifter's ergonomics make for an extremely comfortable, intuitive setup for the best performance when ascending or descending. The lever body is built for hard wear and tough usage, to continue working even after impact. Paired up with a Zee or Saint rear derailleur, you will be equipped to tackle any trail, no matter how gnarly.

Features :

  • Dyna-Sys 10-speed shift lever, rear only (1x10 specific)
  • Rapid Fire Plus
  • 2-way release (upshifts actuate with thumb or index finger)
  • Textured Shifter Levers
  • Linear Shift Effort
  • Shimano Shift cable included
  • Shimano Part Number: ISLM640RA
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REVIEW SNAPSHOT®

by PowerReviews
Shimano M640 Zee Shift Lever
 
4.4

(based on 31 reviews)

Ratings Distribution

  • 5 Stars

     

    (15)

  • 4 Stars

     

    (15)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

97%

of respondents would recommend this to a friend.

Pros

  • Easy to use (18)
  • Durable (16)
  • Lightweight (11)
  • Easy to install (9)
  • Attractive (5)

Cons

  • Heavy / bulky (5)

Best Uses

  • Mountain bikes (18)
  • Mountain biking (8)
    • Reviewer Profile:
    • Avid cyclist (19), Casual/ recreational (9)
    • Was this a gift?:
    • No (29)

Most Liked Positive Review

 

Working great so far

I should say upfront that I have only had the shifter for a month, so long-term durability is still to be determined.
So far though, the shifter has performed very well and has...Read complete review

I should say upfront that I have only had the shifter for a month, so long-term durability is still to be determined.
So far though, the shifter has performed very well and has worked exactly as intended with an also newly installed Zee rear derailleur. In general, Zee seems to just be a great combination of all the trickle-down technology Shimano has on offer - I really think it's great value for your dollar for the entire Zee line and this shifter appears to be no different.
The large triggers initially seemed a little too large coming from my previous shifters, but a month in, I can't say I really notice at all - so, no complaints really.
For those that care about weight - my shifter weighed in at 129 grams.

VS

Most Liked Negative Review

 

Good Shifter Poor Build Quality

I have used this shifter for 9 months and in that time I have had to open it up and work on the shifter twice for it to have normal operation. Initially out of...Read complete review

I have used this shifter for 9 months and in that time I have had to open it up and work on the shifter twice for it to have normal operation. Initially out of the box the shifter worked great with a easy pull. after time the shift quality degraded becoming tough to actuate the downshifts. Additionally on two seperate occasions the level became lose and required adjustment. the second time damaged one of the springs in the shifter and rendered it unusable. I will be buying SLX or better shifters from now on. the deore mech it was connected too is running strong and has had zero issues in the same amount of time.

Reviewed by 31 customers

Displaying reviews 1-10

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5.0

Nice!

By Andy

from PNW

About Me Casual/ Recreational

Verified Buyer

Pros

  • Durable
  • Easy to Use
  • Lightweight
  • Versatile

Cons

    Best Uses

    • Mountain Bikes

    Comments about Shimano M640 Zee Shift Lever:

    Awesome DH quality gear at a really inexpensive price? Yes please! This shifter was a breeze to install, shifts quietly and flawlessly every time.

    • Was this a gift?:
    • No
     
    5.0

    Simple

    By Pete

    from Tehachapi

    About Me Avid Cyclist

    Verified Buyer

    Pros

    • Durable
    • Easy to Use
    • Versatile

    Cons

      Best Uses

      • Mountain Bikes

      Comments about Shimano M640 Zee Shift Lever:

      Really how do you rate a MTB shifter?
      Installation = EASY
      It works as it should. No problems.

      • Was this a gift?:
      • No
       
      5.0

      It shifts!

      By Travis

      from Kitsap Peninsula

      About Me Avid Cyclist

      Verified Buyer

      Pros

      • Easy to Use
      • Lightweight

      Cons

        Best Uses

        • Mountain Bikes

        Comments about Shimano M640 Zee Shift Lever:

        I like the thumb/index finger shifting I am glad that is the style on this one!

        • Was this a gift?:
        • No
         
        4.0

        Affordable shifter

        By John

        from RI

        About Me Avid Cyclist

        Verified Buyer

        Pros

        • Easy To Install

        Cons

          Best Uses

          • Mountain Biking

          Comments about Shimano M640 Zee Shift Lever:

          Nice but bulky

          • Was this a gift?:
          • No
           
          5.0

          Great Value

          By dbauer

          from Burt, MI

          About Me Avid Cyclist

          Verified Buyer

          Pros

          • Price

          Cons

          • None

          Best Uses

          • Mountain Biking

          Comments about Shimano M640 Zee Shift Lever:

          Great price for quality.

          • Was this a gift?:
          • No
           
          5.0

          i would buy this product again

          By T.ROD21

          from Brooklyn NY

          About Me Avid Cyclist

          Verified Buyer

          Pros

          • Attractive Design
          • Durable
          • Easy To Install
          • Great Price
          • Lightweight

          Cons

            Best Uses

            • Mountain Biking

            Comments about Shimano M640 Zee Shift Lever:

            The Zee m640 is great.Great shifting on the gears no let downs at all.

            • Was this a gift?:
            • No
             
            4.0

            Great performance at a great price.

            By The Bruiser

            from Nashua, NH

            About Me Competitive Cyclist

            Verified Reviewer

            Pros

            • Durable
            • Easy To Install

            Cons

            • Bulky

            Best Uses

            • Downhill
            • Mountain Biking
            • Racing

            Comments about Shimano M640 Zee Shift Lever:

            The Shimano M640 Zee Shift Lever works great and shifts perfectly. My only complaint is that its on the larger/bulky side of shifters. I used to run and older SRAM X9 shifter and it was half the size of the ZEE shifter. But overall, its a great shifter.

            • Was this a gift?:
            • No

            (1 of 1 customers found this review helpful)

             
            2.0

            Good Shifter Poor Build Quality

            By Jake

            from Charlotte, NC

            About Me Avid Cyclist

            Verified Reviewer

            Pros

            • Cheap
            • Easy to Use
            • Versatile

            Cons

            • Bulky
            • Poor Quality
            • Weak

            Best Uses

            • Mountain Bikes

            Comments about Shimano M640 Zee Shift Lever:

            I have used this shifter for 9 months and in that time I have had to open it up and work on the shifter twice for it to have normal operation. Initially out of the box the shifter worked great with a easy pull. after time the shift quality degraded becoming tough to actuate the downshifts. Additionally on two seperate occasions the level became lose and required adjustment. the second time damaged one of the springs in the shifter and rendered it unusable. I will be buying SLX or better shifters from now on. the deore mech it was connected too is running strong and has had zero issues in the same amount of time.

            • Was this a gift?:
            • No
             
            4.0

            Works great, at a price thats unbeatable...

            By Sam Dirt

            from Orlando Florida

            About Me Avid Cyclist

            Verified Buyer

            Pros

            • Durable
            • Easy to Use
            • Lightweight

            Cons

            • None

            Best Uses

            • Long Rides
            • Mountain Bikes
            • Urban Assault

            Comments about Shimano M640 Zee Shift Lever:

            I have this shifter on my AM hardtail along with the zee derailer, zee crankset and the zee derailer. The zee line of parts are rock solid.....

            • Was this a gift?:
            • No
             
            4.0

            Great Upgrade

            By Rick

            from SW VA

            About Me Casual/ Recreational

            Verified Buyer

            Pros

            • Easy to Use

            Cons

              Best Uses

              • Mountain Bikes
              • Road Bikes

              Comments about Shimano M640 Zee Shift Lever:

              Upgrade single speed to 1 X 10

              • Was this a gift?:
              • No

              Displaying reviews 1-10

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              Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

              Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.