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SunRace MTB RDM900 Rear Derailleur
$ 35.49
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Product description SunRace MTB RDM900 Rear Derailleur
Rear deralleur 9 SPEEDS MTB RDM900.
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Does the RDM900 derailleur replace a Shimano Sora?
25/04/2024
Giovanni
Hi, a question: I have a gravel bike with an FSA 30/46 crankset and a Sunrace 9v 11/34 cassette. I changed the cassette with an 11/40 but the derailleur, although adjusted to the maximum, is not suitable for the 40. Could I replace the original Shimano Sora with a SunRace RDM900 derailleur so that I can use the 40? A thousand thanks
Answer of Chris
While the 9sp should work with a drop ,bar shifter I could never get this to work perfectly with my shimano shifter. More importantly this has a 41T total capacity and sounds like your set up would require a derailleur that can accept 45T.
Compatibility
09/03/2024
Oslin
Hi. Will it be compatible with a 10 speed shimano deore shifter and 10 speed sunrace 11/50t cassette with a 22/36t 2x crankset?
Answer of Joren
RDMS100 is 10 speed variant. Apparantly only useable for single speed in front. https://sunrace.com/wp-content/uploads/2023/04/RDMS100.MD-BOX.pdf I used this on a 9 speed 11-42 cassette with a single speed in front. Bàv!
Answer of Julian
Probably not. The max capacity of this RD is 40T. That is the difference between the front chainrings (36-22 = 14), plus the difference between the rear cassette (55-11 = 39). So 39+14 = 53, which is greater than 40. If you mounted this RD, you´ll have either too much loose chain in the small gears, or too tight of a chain to get into the big gears. You´ll have to either run a 1x in the front, or get a cassette with a smaller range.
Materials
26/09/2023
Pietro
Is the cage removable and what material is it made of, aluminum or plastic? Thank you
Answer of FRANCESCO
It is removable and is made of aluminium
Triplate relief 40-30-22
16/08/2023
Oscar C
Hello, I would like to know if it is compatible with a shimano m4000 triple chainring with a 40-30-22 tooth ratio, to be used with a 9v cassette
Answer of Matt
It is compatible with your setup. It will go to a max of an 10-51 cassette, regardless of the front chainring setup.
levers
19/06/2023
Abel
Would it work with sti shimano sora shifters? Thank you
Answer of Matt
Yes, Shimano 9 speed road and MTB shifters use the same pull ratio, so this will work great with your Sora shifters.
Compatible with shimano controller?
17/06/2022
Ana Abigail
Can I install it with a Shimano acera 9v control?
Answer of Lok Kwan Esmond
It should work with any shimano 9 speed shifter, as they are all 1.7 pull ratio.
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