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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 bodies
  • Weight: 448 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.
4.6 / 5.0
47 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
31
14
1
0
1
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
Awesome!!!
For almost 10 years I have used JensonUSA, never a complaint, NEVER
June 9, 2016
Location:
Santa Cruz CA
Straight forward 10 speed with the benefits of 11speed
Easy to install, cheap, sturdy
December 12, 2016
Purchased
1 month ago
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
Better than extended cog
UPS flubbed up a bit on this one.. Not jensons fault. Order showed delivering and then was placed on backorder NBD, just glad I got mine.
May 1, 2016
Location:
Underhill, VT
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
Works better than expected!
If you live in California you can't beat the shipping speed from Jenson. I ordered the product at 2PM on a Thursday and had the cassette in my hand at 10AM on Friday.

Just in time for weekend install and riding!
August 11, 2016
Location:
Orange County, California
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.
Added Jan 2, 2017
January 2, 2017
Purchased
1 month ago
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
1 month ago
Location:
Utah
Great Product Great price
Mountain Biking
October 18, 2016
Location:
Orange County CA

Q & A

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Browse 6 questions Browse 6 questions and 28 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.
Sent from my iPhone
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.
Is this compatible with SRAM xd driver?
Josh on Aug 19, 2016
BEST ANSWER: Another way of thinking of it would be is the xd driver needed for a sram 10spd compatible cassette? Jenson lists this cassette as compatible with sram 10spd. If it was xd compatible they would say it. To my knowledge the xd is for 11&12spd cassettes. Why wouldn't you go for an 11spd if you have the xd driver?
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 can't say. I'm running a triple 48/36/24. The 42 cog won't work with my 105 deraileur.
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.