Compatiblity issues in upgrade - BB and cranks- Mtbr.com
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  1. #1
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    Compatiblity issues in upgrade - BB and cranks

    Hello

    I want to upgrade my son's bike. He rides a Scott Scale 960, year 2017.
    Among others, it will go from 2x10 to 1x12.
    Now the bike comes with a Shimano BB-MT500-PA / shell 41x89.5mm. That's press-fit. And a 2x10 transmission (36x22front, 11-36 rear).

    I figured out that my combination would be:
    - SRAM NX dub (link to CRC)
    - SARM DUB pressfit MTB Bottom Braket (link to CRC)
    - NX cassette, shifter, derailleur and chain are quite clear.
    Am I correct that these would be compatible with the current setup?
    Are there any (cheaper) alternatives to this upgrade (keeping the 1x12 ambition)?
    Thanks you all!

  2. #2
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    what size NX cassette? 42? Might have derailleur issues... I would consider getting a GX derailleur

  3. #3
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    the NX cassette will be 11-50, and the rear derailleur will fit. It's the BB that I'm worried about.

  4. #4
    jcd's best friend
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    Are the wheels standard or XD hubs? I just installed my SRAM GX Eagle last night and used a Sunrace 11-50 cassette which is Eagle compatible and fits on a standard hub. If I understand right, the NX Eagle should be standard fit too. If I recall, the GX cassette requires an XD driver.

    From what I learned about DUB, it should fit any bottom bracket. That's what I found on the SRAM website.

    Also, you can check out the SunRace 12 speed setup. It came out earlier this year. They created a shifter, rear mech, and chain to go with their 11-50 cassette. I don't know the exact costs, but I'm sure you can find it online. There is a slight weight penalty with the SunRace cassette, but there aren't a ton of options for a standard hub just yet.
    Trek Émonda | Transition Scout | Transition PBJ | Framed Attack Pro

  5. #5
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    It's a standard freehub. I hesitate between the 11-50 SunRace CSMZ90 Cassette
    or the SRAM PG-1230 Eagle Cassette 11-50. both work with standard hubs, similarly priced, roughly similar weight.
    But it's not the cassette that I worry about, it's the BB, and the relation between the crankset, the BB and the frame - if the chainring will fall exactly in the middle of the cassette in order to have smooth shifting etc.
    I've read the available info on SRAM site (which I find scanty). I'm betting on the DUB system to be compatible as advertised.

  6. #6
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    Quote Originally Posted by Battery View Post
    Are the wheels standard or XD hubs? I just installed my SRAM GX Eagle last night and used a Sunrace 11-50 cassette which is Eagle compatible and fits on a standard hub. If I understand right, the NX Eagle should be standard fit too. If I recall, the GX cassette requires an XD driver.

    From what I learned about DUB, it should fit any bottom bracket. That's what I found on the SRAM website.

    Also, you can check out the SunRace 12 speed setup. It came out earlier this year. They created a shifter, rear mech, and chain to go with their 11-50 cassette. I don't know the exact costs, but I'm sure you can find it online. There is a slight weight penalty with the SunRace cassette, but there aren't a ton of options for a standard hub just yet.
    nx is standard hub GX is XD only

  7. #7
    since 4/10/2009
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    your link, strangely enough, doesn't show the product in question. But the way SRAM makes bb's, they only make two standards. BSA threads, or pressfit into a 41mm shell. Since you have a bb shell with those specs, it'll work.

    Chainline is a slightly different question. There are ways to adjust the chainline from however it comes out installed as per directions. Usually involves a chainring with a slightly different offset (usually towards the bigger cogs). Install as per directions first, and then see if you need to do anything further.

    I doubt there's another way to go Eagle for less, unless you get a microshift thumbie, maybe

    https://www.microshift.com/en/produc.../mtb-shifters/

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