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Shimano M770 XT 9 Speed Cassette

Item #: CS306B00
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Shimano M770 XT 9 Speed Cassette


Shimano Deore XT M770 Cassette features "Pro Level" technology at an accessible price.  The alloy carrier keeps the weight down and varying tooth profiles provide smooth shifting.  One unique feature on XT, pins behind the largest cog, help prevent the chain from damaging spokes.
  • Weight(claimed): 297 g
  • Compatible with 9 speed drivetrains
  • Fits all Shimano and Shimano compatible 8/9sp cassette bodies
  • Spider arm design
  • Aluminum lock ring
  • 34t version uses a 5 arm spider
  • 32t version uses a 4 arm spider
4.5 / 5.0
79 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
52
23
1
1
2
Your bike isn't dead
Just like any vital part of a transmission on a car, cassettes wear out. Luckily it won't cost you thousands to replace on your bike. Nothing breathes new life in to your bike like a new cassette (at least after 3 years and thousands of miles). I'm loyal to Shimano after a horrible experience with SRAM, everyone has their own opinion, but you just can't beat Shimano. It's the reliability, quality, value, and performance you'd expect from Deore XT. Don't buy a new bike, just fix your transmission. Bike feels like it shifted off the showroom floor 3 years ago, keeping in mind I replaced the chain along with it.

PROS: Precise Shifting, Lightweight, Enhances Pedaling Efficiency, Durable, Easy To Install
October 28, 2014
Location:
Gilbert/San Tan/Prescott
.
.

PROS: Durable
April 14, 2015
Location:
.
Top Quality
Upgraded from a 32 tooth rear cassette to 34, I run a single 34 on front. Very nice gear spread and pretty smooth as well. Firm precise shifting.

PROS: Precise Shifting, Easy To Install, Durable, Enhances Pedaling Efficiency
October 22, 2014
Location:
Marietta, GA
Old Reliable
I have been using Shimano XTR and XT cassettes for many years and in my opinion you can't beat XT's performance for the dollar. I think the XT line up is the best value in mountain cassettes if you ride Shimano drive trains.

PROS: Easy To Install, Precise Shifting, Durable, Lightweight, Enhances Pedaling Efficiency

CONS: None

BEST USES: Mountain Biking, Road Biking, Commuting
September 16, 2014
Location:
Collegeville, PA
Great cassette but needed work ? ?
Had Jenson install when purchased and immediately noticed a faint spoke sound. After a few rides i had thought i had a few loose spokes but every time i checked them i found nothing. As the sound grew louder i had finally found the problem, shimano had designed the big sprocket with pins integrated as to protect from "chain damage to spokes" but these little pins had hit all spokes slightly damaging them. The sprocket had to have the pins lightly ground down with a dremell to clearance the spokes. I would have given it 5 stars but due to the fact that i was replacing the same exact cassette with a new one and the old one did not have the pins and now i had to modify a new cassette, i knocked it to 3 stars. Had jenson caught this on install i would had just bought something else and saved myself some time and spoke damage. If u are thinking the freewheel hub had play it was replaced weeks earlier so that is not the culprit. BTW who has had a chain jump over the large sprocket on the cassette ? Every time my chain derails i am flying and my chain falls to the smallest cog!

PROS: Durable, Precise Shifting

CONS: Difficult To Install
November 13, 2013
Location:
loma linda
Love this product
Easy to install and works great

PROS: Enhances Pedaling Efficiency, Precise Shifting, Easy To Install, Durable
October 18, 2016
Location:
Tampa, FL
XT
It's the best you can get. It's worth the few extra dollars to get this lighter cassette.

PROS: Durable, Precise Shifting, Easy To Install, Enhances Pedaling Efficiency, Lightweight

BEST USES: Mountain Biking, Road Biking
October 24, 2016
Location:
South Bay, Los Angeles, CA
Form and function
I use an XT drivetrain on all my bikes and have no complaints. Sweet spot of affordability and quality. Hopefully they don't stop making 9 spd anytime soon.

PROS: Durable, Easy To Install
October 27, 2016
Location:
Saratoga NY
Works perfectly
Used this to replace a worn out cassette on an older MTB. Easy swap and works as expected.

PROS: Durable, Precise Shifting, Lightweight, Easy To Install
November 16, 2016
Location:
Washington DC Metro
I will definitely buy again .
Jensen always ships fast- and everything is boxed up nicely :)

PROS: Easy To Install, Precise Shifting, Durable, Enhances Pedaling Efficiency, Lightweight
November 15, 2016
Location:
Cincinnati , OH

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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.