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Shimano XT M770 Front Derailleur

ITEM NUMBER: 105 SHI708 T/S 689
Clearance item
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Shimano XT M770 Front Derailleur

When Shimano released its "deer head" rear derailleur back in the early 80's, it revolutionized the cycling world by effectively creating the world's first mountain bike drivetrain. Ever since then, Deore XT has come to be known as the benchmark for MTB groups. The front derailleur seen above is a prime example, providing crisp, smooth shifting performance at an incredible price. Designed for use with a triple crankset and 9-speed drivetrain, the FD-M770 seen above is a top-swing (low-clamp), dual pull model that fits a 34.9mm seat tube.

  • top-swing/dual pull
  • Mega-9 (9-speed only)
  • Angled adjustment screws for easy access with a screw driver
  • Lighter cage (chain guide)
  • Smooth operation
  • Increased tire clearance through modified cage tail shape
  • Includes shims to work with 28.6 and 31.8mm seat tube
  • Approx. weight: 152g
We have many other components available for 9-speed drivetrains, which can be seen here.


Speed: 9

Chain Ring: Triple/Double

Applicable Chain Line: 50mm

Total Gear Teeth: 44T/48T

Total Capacity: 22T

Top-Middle Min. Capacity: 12T

Chain Stay Angle: 66-69 degrees

Clamp Band (Material/Finish): Aluminum/Painted

Outer Link: Steel/Painted

Inner Link: Aluminum/ Painted

Chain Guide: Steel/Chrome Plated

Showing Questions 1 of 1

Q: What size clamp, 31.8 or 34.9 or is it universal and will work with both?

A: This item include shims that will allow both 31.8 and 34.9 tube sizes.

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Long Live The Triple! - Oct 25, 2015

1 2 3 4 5
5 out of 5 stars
Northridge, CA

Everyone is shifting (ha!) to 1x11's right now and I just don't relate. The argument for a 1x11 is like the argument I hear people who don't ride bikes making for fixies. They say it's less complicated. It's easier to maintain. And since I carry up three flight of stairs to my loft, it makes it so much lighter. I think all of that is silly. I have used this derailleur for years without any more maintenance than a clean and lube every once in a while. I have never dropped a chain with it. And it always shifts crisply and beautifully. And while my friends with 1x11 systems are dealing with some sort of climbing or descending gear ratio compromise, I'm riding with my full 3x9 range.

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