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Shimano RD-M4000, 9-Speed, TOP-Normal, SGS, Shadow Design

4.5 out of 5 stars 62 ratings
Currently unavailable.
We don't know when or if this item will be back in stock.
Brand SHIMANO
Color Gray
Material Aluminum
Item Weight 0.85 Pounds
Case Material Aluminum

About this item

  • Cage Length: Long
  • Chain Wrap Capacity (teeth): 45 teeth
  • Drivetrain Speeds: 9
  • Largest Cog (teeth): 36
  • Rear Derailleur/Shifter Compatibility: Shimano Mountain
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Product Description

• Cage Length: Long
• Chain Wrap Capacity (teeth): 45 teeth
• Drivetrain Speeds: 9
• Largest Cog (teeth): 36
• Rear Derailleur/Shifter Compatibility: Shimano Mountain

Brand:Shimano

Product information

Technical Details

Mounting Type ‎Braze-On Mount
Number of Teeth ‎45
Manufacturer ‎Shimano
UPC ‎689228578944
Item Package Dimensions L x W x H ‎7.17 x 4.17 x 3.78 inches
Package Weight ‎0.39 Kilograms
Item Dimensions LxWxH ‎4 x 3.75 x 6.5 inches
Brand Name ‎SHIMANO
Suggested Users ‎unisex-adult
Part Number ‎ERDM4000SGS
Size ‎Long Cage
Sport Type ‎Cycling

Additional Information

ASIN B00MQL1KIC
Customer Reviews
4.5 out of 5 stars 62 ratings

4.5 out of 5 stars
Date First Available August 15, 2014

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Shimano RD-M4000, 9-Speed, TOP-Normal, SGS, Shadow Design

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Customer reviews

4.5 out of 5 stars
62 global ratings

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Customers say

Customers find the derailleur works well and shifts smoothly, with one noting it stays put once shifted. The product receives positive feedback for its quality, ease of installation, and smooth operation. Customers consider it good value for money.

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5 customers mention "Functionality"5 positive0 negative

Customers find that the derailleur works very well.

"...This derailleur works very well with great accuracy and stays put once shifted...." Read more

"easy install, with a little adjustment, works great" Read more

"...I installed it on my 1x7 and for the most part works great...." Read more

"This gear does the job, great for the price, however it is a bit fragile." Read more

5 customers mention "Shifting ability"5 positive0 negative

Customers praise the derailleur's solid shifting performance, with one customer noting that it stays put once shifted and another mentioning its good spring stiffness.

"...This derailleur works very well with great accuracy and stays put once shifted...." Read more

"Good value, shifts well. Only when went to install had to buy new shift cable. Shadow derailleur mounts closer to wheel old cable not long enough" Read more

"...The stiffness of the spring is good with no bouncing around when you take drops...." Read more

"...Very solid shifting using 9 speed Microshift bar ends. Very pleased a d will probably use this same derailleur on my other touring bike.." Read more

4 customers mention "Product quality"4 positive0 negative

Customers find the derailleur to be a good product, with one mentioning it works well as a replacement part.

"...Good product." Read more

"Good product!" Read more

"Good replacement..." Read more

"good product..." Read more

4 customers mention "Value for money"4 positive0 negative

Customers find the derailleur offers good value for money.

"Good value, shifts well. Only when went to install had to buy new shift cable. Shadow derailleur mounts closer to wheel old cable not long enough" Read more

"Great price for a nice derailleur. Upgraded my sons Tourney." Read more

"This gear does the job, great for the price, however it is a bit fragile." Read more

"Great for money...." Read more

3 customers mention "Ease of installation"3 positive0 negative

Customers find the derailleur easy to install.

"easy install, with a little adjustment, works great" Read more

"Replacement for Acera derailleur that was worn from use. Easy to install and adjust, shifts smoothly." Read more

"Quick no hassle replacem..." Read more

3 customers mention "Ease of operation"3 positive0 negative

Customers find the derailleur easy to operate, with one customer noting its smooth performance.

"...Shimano derailleur is shifting a 10 speed rear cassette with friction thumbies...." Read more

"...It shifts well and smooth but it is just a bit sluggish between cogs...." Read more

"Awesome smooth operation.Hits the gears precisely+Accurate.Puts a 18yr old Deore Lx derailler to shame.Quick gear drops{Upshifts}+ smoother...." Read more

3 customers mention "Ease of use"3 positive0 negative

Customers find the derailleur easy to use.

"Great price for a nice derailleur. Upgraded my sons Tourney." Read more

"This derailleur is an amazing little mech. I installed it on my 1x7 and for the most part works great...." Read more

"Great item and works perfect!" Read more

For a 1x7??
4 out of 5 stars
For a 1x7??
This derailleur is an amazing little mech. I installed it on my 1x7 and for the most part works great. Removing the old one and putting this was a breeze but in order for it to work with 7 speeds in the back you have to tune it. It shifts well and smooth but it is just a bit sluggish between cogs. The stiffness of the spring is good with no bouncing around when you take drops. Cant complain much since I'm adapting it to a 1x7 and is a 9 speed mech.
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Top reviews from the United States

  • Sandy Thompson
    5.0 out of 5 stars 9 speed shifting a 10 speed cassette.
    Reviewed in the United States on March 2, 2020
    Verified Purchase
    This shadow style Shimano derailleur is shifting a 10 speed rear cassette with friction thumbies. This derailleur works very well with great accuracy and stays put once shifted. This derailleur replaced an old Suntour derailleur that couldn't handle the triple up front and the 11-32 on the rear. So far this derailleur has performed very will. The bicycle is a 1980's Nishiki Sebring 12 speed that now has modern aero wheels with 10 speed on the rear. Good product.
    One person found this helpful
    Helpful
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  • Trent Querry
    5.0 out of 5 stars Good replacement
    Reviewed in the United States on October 5, 2019
    Verified Purchase
    Good value, shifts well. Only when went to install had to buy new shift cable. Shadow derailleur mounts closer to wheel old cable not long enough
    Helpful
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  • kartersam
    5.0 out of 5 stars good product
    Reviewed in the United States on February 10, 2020
    Verified Purchase
    easy install, with a little adjustment, works great
    Helpful
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  • Mike C
    5.0 out of 5 stars Great deal
    Reviewed in the United States on June 11, 2020
    Verified Purchase
    Great price for a nice derailleur. Upgraded my sons Tourney.
    Helpful
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  • M. C.
    3.0 out of 5 stars Probably, hopefully fine
    Reviewed in the United States on February 22, 2020
    Verified Purchase
    I haven’t installed this yet, but the one I received wasn’t new. It had been opened before. As far as I can tell all the parts are there so I’ll keep it, but not thrilled.
    Helpful
     Report
  • Reny Navarro
    4.0 out of 5 stars For a 1x7??
    Reviewed in the United States on April 24, 2019
    Verified Purchase
    This derailleur is an amazing little mech. I installed it on my 1x7 and for the most part works great. Removing the old one and putting this was a breeze but in order for it to work with 7 speeds in the back you have to tune it. It shifts well and smooth but it is just a bit sluggish between cogs. The stiffness of the spring is good with no bouncing around when you take drops. Cant complain much since I'm adapting it to a 1x7 and is a 9 speed mech.
    Customer image
    Reny Navarro
    4.0 out of 5 stars
    For a 1x7??

    Reviewed in the United States on April 24, 2019
    This derailleur is an amazing little mech. I installed it on my 1x7 and for the most part works great. Removing the old one and putting this was a breeze but in order for it to work with 7 speeds in the back you have to tune it. It shifts well and smooth but it is just a bit sluggish between cogs. The stiffness of the spring is good with no bouncing around when you take drops. Cant complain much since I'm adapting it to a 1x7 and is a 9 speed mech.
    Images in this review
    Customer imageCustomer image
    2 people found this helpful
    Helpful
     Report
  • Dennis R Preston
    5.0 out of 5 stars Large Range , Solid Shifting
    Reviewed in the United States on September 10, 2018
    Verified Purchase
    Large range 45 tooth capacity allows me to run a 26/36 and 46/12 maximum chainring to cassette. Very solid shifting using 9 speed Microshift bar ends. Very pleased a d will probably use this same derailleur on my other touring bike..
    4 people found this helpful
    Helpful
     Report
  • Kathryn
    1.0 out of 5 stars Nope.
    Reviewed in the United States on January 19, 2019
    Verified Purchase
    Broke the first day.
    2 people found this helpful
    Helpful
     Report

Top reviews from other countries

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  • Sergio
    5.0 out of 5 stars Buono
    Reviewed in Italy on April 29, 2021
    Verified Purchase
    Un buon deragliatore senza spendere troppo
    Report
  • Frageza
    5.0 out of 5 stars Excelente servicio
    Reviewed in Mexico on October 19, 2018
    Verified Purchase
    Llego a tiempo excelente servicio
    Report