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Sunrace MX3 10 Speed Cassette

Item #: CS205B00
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Sunrace MX3 10 Speed Cassette

Sunrace MX3 10-SPEED Cassette

The wait is over. Get that amazing 40 or 42 tooth low gear range, in a more economical form. The Sunrace MX3 10 speed Cassette might be your answer. It works on most current 10 speed systems from Shimano and SRAM. It's also a more cost effective way to go than the aftermarket expander rings, most of which can leave an uneven step and odd shifting in the cassette where another cog needs to be removed. This is a smooth and seamless block of cogs, designed for smooth and even gearing while giving the maximum range. The cassette works with most medium and long cage rear derailleurs, but may require a longer B screw to clear the large cog depending on the length of your derailleur hanger.

Sunrace MX3 10-SPEED Cassette features:

  • 6 Sprockets on 2 Alloy Spider Carriers
  • Manufacturer: SunRace (Sturmey Archer)
  • Compatibility: Shimano/SRAM 10 Speed
  • Freehub Style: Shimano / SRAM Freehub 10 speed freehub bodies
  • Weight: Approx. 380 grams (11-42)
  • Please note that this gear combination is not officially supported for 10-speed systems by the manufacturer. SRAM and Shimano both spec 36T as the maximum cog on their 10-speed rear derailleurs. There are a number of aftermarket derailleur accessories that will allow and/or improve shifting for these larger cassettes.
4.4 / 5.0
59 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
37
17
2
0
3
Works great!
The shifting isn't quite as smooth and quiet as Shimano but if you're looking to go with a wide-range 10 speed cassette this is way easier and less expensive than fooling around with one of the aftermarket expander cogs. I've got two of these cassettes and they both work very well.
April 11, 2016
Location:
Raleigh, NC
Not bad
I was thinking I would break it, but it holds up real well. I do use a zee with a rad cage and it shift perfectly.
September 30, 2016
Location:
San Jose ca
Great cassette
This is one of the few good options remaining for 10 speed 42t cassettes. Shifting is fantastic and looks great. Very happy with this cassette. On the heavy side, but for the price it can't be beat.
User submitted image
Added Jan 2, 2017
January 2, 2017
Purchased
4 months ago
Straight forward 10 speed with the benefits of 11speed
Easy to install, cheap, sturdy
December 12, 2016
Purchased
5 months ago
Awesome!!!
For almost 10 years I have used JensonUSA, never a complaint, NEVER
June 9, 2016
Location:
Santa Cruz CA
Better than I expected
Took some work to get the derailleur dialed in, initially it was skipping off the biggest ring. Once I got the limits and chain length right it's much better, still a bit jarring going from 36T to 42T. Given the 42T is just the emergency granny gear for my 1X (32T front) I'm very happy with the results.
May 2, 2016
Location:
New York City, Ny
Great Alternative to adding 42Cog
Bought for a 1x10 conversion on a 2016 Trek Fuel EX 8 29er. Only a few bucks more than a single 42 Cog, so why not get something with a 42 native to the cassette? Easy to install and worked as advertised with a Wolf Tooth Goat Link.
December 14, 2016
Purchased
4 months ago
Location:
Utah
Could be better quality. if given the option I would rather file some metal over a loosely goosey fit
Best upgrade under $100. It Does what cha think it does. Why pay more for the same thing. Had to file down one of the spacer no big deal for a dremel.
On cloud 9
On cloud 9
February 28, 2017
Location:
The dark side of your imagination
Great value and works fine
No complaints. Allowed my one-by conversion to take place. My local bike shop got it working perfectly.
January 23, 2017
Purchased
8 months ago
Location:
Kingston, Canada
Great Product Great price
Mountain Biking
October 18, 2016
Location:
Orange County CA

Q & A

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Browse 7 questions Browse 7 questions and 40 answers
Does this cassette require a narrow wide chain and chainring?
Will on Aug 8, 2016
BEST ANSWER: I used a Race Face narrow wide chain ring. I do not know if it is required, doesn't seem like it should be.
There is something called a dog bone (or something like that) and an aftermarket derailleur arm available to make your derailleur shift smoothly with this cassette. I did not try either. I tried it with a Shimano SLX derailleur and an SRAM GX. Both long cage ten speed clutch derailleurs. It did not shift well with either.
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Is cassette with 42 ring compatible with sram derailleur long cage ?
Scott on Oct 8, 2016
BEST ANSWER: Maybe, as it will depend on what model you are using because there is no "sram derailleur long cage", especially not now with all the different sram models of rear derailleurs on the market. I also have noticed not all bike rear derailleur attachment points are created equal thus your drivetrain may work well here but not over there on a different bike. Don't forget to set your screws on the derailleur and if its a one by system your pedaling then expect the chain to down shift/bind when you back pedal in the easiest gear or two.
I'm doing a 1/10 drive. With the 42 ring will the sram gx 10 speed derailleur work best?
Jason W on Jan 14, 2017
BEST ANSWER: I've used this with my SRAM X7 rear derailleur and works perfectly. The only concern, and this is for any type of 1X drivetrain, is to lose the chain when there is pedaling back, then the chain boots from 42 to 36. You have to be very cautious with this, especially on very steep climbs. I like 1X drivetrains but I rather prefer 2X.
I want to replace my Shimano HG-50 11-36 Cassette with this sun race 11-42.. I already converted the 2x to a 1x race face narrow wide 30 tooth front chain ring. I have a shimano diore RD 615 SGS long cage derailer. Came on my 2017 Giant Trance 3. Will this derailer work with this sun race cassette or do I need to change the derailer as well?
G Z on Mar 23, 2017
BEST ANSWER: You'll need to buy RD mods if you want to keep that RD, or suffer compromised shifting, like an One-Up cage.

it's a better long term decision to get a Shimano 11 spd mtn RD, like the RD-M7000, which will work with your Shimano 10spd shifter with this cassette. It's what I did. One less thing to buy if you decide to go with 11 spd.
Is this compatible with SRAM xd driver?
Josh on Aug 19, 2016
BEST ANSWER: No, this only fits on a Shimano style driver, not the Sram Xd.
Hi. Can I replace my bikes Shimano HG 50 (11T-36T)with this? Do I have to change any parts for it to work? I currently have a Diore XT shadow plus derailleur. Thanks
Bruised Lee on Oct 30, 2016
BEST ANSWER: Yes you can run it but you may need to purchase a radr cage from Oneup for your rear mech. Some have said it will work without it but the shifting will suffer.
Hi,

It states 448 gram weight. Is that version with all steel cogs? I'm looking for one with 2 biggest cogs in Alu.

Thanks
Alex on Apr 18, 2016
BEST ANSWER: The weight on the MX3 11-42 is in the range of 380g. That's what the reviewers measured it at and consistent with my own measurement when I got mine.

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Free Shipping Offer

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.