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Shimano XTR Rd-M9100 Rear Derailleur Stealth Gray, Sgs 12 Speed | rear-bike-derailleurs

  • Based on 38 reviews
Condition: New
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$261.26 Why this price?
4th of July Sale · 21% off was $330.00

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Availability: 15 left in stock
Fulfilled by Backcountry

Arrives Wednesday, Jul 8
Order within 1 hour and 19 minutes
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Size: 9100 - SGS


Features

  • Material: aluminum
  • Capacity: 35T
  • Cassette Range: [SGS] 10-51T, [GS] 10-45T
  • Gearing: 1x12
  • Compatibility: [chain] XTR CN-M9100, [cassette] XTR CS-M9100, [shifter] XTR SL-M9100-R, XTR SL-M9100-IR

Description

With the release of the XTR M9100 12-speed drivetrain, Shimano jumps right back to the front of the pack by expanding the available gear range and offering better shifting performance than ever before. The new XTR RD-M9100 Rear Derailleur is specifically optimized for Shimano's new wide range cassettes, and features several updates that ultimately lead to smoother and quieter drivetrain operation. It comes in two different cage lengths depending on what gear ratio you choose, letting you select the best option to suit your riding style and preferences. The M9100 Rear Derailleur sees improved chain stability and reduced friction thanks to larger 13t pulley wheels, making it better able to withstand full-force pedaling while shifting gears as smoothly as ever. Shimano was also able to decrease the rear derailleur tension in the lower gear positions, preventing the high chain tension that causes excess friction and noise, and thus a loss of efficiency. The Shadow RD+ clutch system provides excellent chain retention in rough terrain, and keeps annoying chain slap to a minimum. Lastly, the addition of a protective bumper to the inside of the derailleur cage quiets operation even further by cushioning the sound of any chain rub. There are two options available depending on your desired setup. The longer cage SGS model is required for the 10 - 51 tooth XTR 12-speed cassette, but also works with the 10 - 45t Rhythm-Step 12-speed cassette. The GS model features a shorter cage with 28mm more ground clearance for rocky, rooty, and aggressive terrain. It's designed exclusively for the 12-speed 10 - 45t Rhythm-Step cassette.

Brand: SHIMANO


Color: Stealth Gray


Material: Multi


Item Weight: 14.4 ounces


Mounting Type: Braze-On Mount


Brand Name: SHIMANO


Manufacturer: Shimano


UPC: 689228880252


Manufacturer Part Number: IRDM9100SGS


Model Number: Shimano


Included Components: Rear Derailleur


Unit Count: 1.0 Count


Warranty Description: Limited Warranty


Item Weight: 14.4 ounces


Item Dimensions L x W x H: 6.1"L x 5.99"W x 4.02"H


Color: Stealth Gray


Material Type: Multi


Case Material Type: Aluminum


Mount Type: Braze-On Mount


Number of Teeth: 51


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jul 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • A+ XTR quality
Size: 9100 - SGS
I've always had really good luck and liked the feel of the xtr derailers. My old 11 speed XTR was almost maintenance free for 4 years and felt better than my bikes with sram GX parts. This is no different. I also like the B screw adjustment line. I'm using it with a Sram 10-50t so I had to tune the B screw a bit more inboard than the 51T line suggested but a little experimenting got it dialed in. Shifts great just like my old 11 speed XTR did, nice crisp precise shifting. Very happy with it. ... show more
Reviewed in the United States on October 27, 2021 by MartinM210

  • Shifts great & keeps the chain quite
Size: 9100 - SGS
I managed to Completely snap my original XT derailleur on some logs awhile back on a ride and needed a replacement fast. Unfortunately all I could find that shipped fast was this XTR derailleur. It works great just like the XT but lighter, more expensive, and shinier.
Reviewed in the United States on September 3, 2021 by Alex Alex

  • converted to 12 speed
Size: 9100 - SGS
Converted form 10 speed to 12 speed drive train, full shimano components really needed to be used to get best shifting, tried KMC/sram changes but they do not shift as quietly or precisely as the shimano.
Reviewed in the United States on November 25, 2020 by Luvs coffee

  • Se los recomiendo
Size: 9100 - GS
Excelente producto
Reviewed in the United States on January 16, 2021 by Wilferdo Nuñez

  • Excellent but there’s a problem
Size: 9100 - SGS
The shimano 12 speed XTR derailleurs are great but suffer from a very bad flaw. I’ve been running both SRAM eagle and XTR 12 speed drives. Both great. The shimano shifts and runs slightly more smoothly than the the SRAM. The shimano cassette has a more progressive gear range. But... there is a major problem with the XTR: the clutch housing is not waterproof. Water can find its way into the clutch from the clutch lever seal and the clutch cover o-ring. Once water gets inside the clutch, it rusts and need to be replaced. I’d recommend lubing both these seals before Installing an XTR derailleur. ... show more
Reviewed in the United States on September 26, 2020 by Luc Busquin

  • Defect
The clutch mechanism gets water in it, which corrodes and destroys the clutch. Mine was toast in under 100 miles (less than a month), and I live in the desert. I expect better with a high end product like this.
Reviewed in the United States on October 27, 2020 by ACN

  • It's XTR, Shimano perfect shifing.
Size: 9100 - GS
I like how well it performs and its lighter weight. Of couse, XTR = more $$$
Reviewed in the United States on January 9, 2023 by RyanCS

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