Cassette question
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  1. #1
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    Cassette question

    Hello all,

    I have a Lynskey R300 with a SRAM 11 speed 11-42 cassette (non XD). When I bought this bike, I put this cassette on my 2018 Mavic Kysrium Pro carbon wheels. Being 11 speed, I did not use the 1.85 mm spacer. The cassette is not loose and shifting has been fine. I have about 500 miles on it now.

    Recently I was on the SRAM website and noticed that in the instruction for the 11-42 cassette it states that if this cassette is used with an 11 speed driver then the 1.8 mm spacer should be used.

    I removed the cassette and placed the spacer but now find it needs adjustment (which makes sense) but that the 11 speed cog is quite close to the dropout.

    Is there a reason why this spacer is mandatory? Will damage ensue if I continue using the cassette with it?
    Steve
    Lynskey R300 disc SRAM 1x
    Lynskey titaniium seatpost
    Speedplay ultralight action pedals
    SMP Drakon saddle
    Redshift shock absorption stem
    Mavic Pro Carbon wheels

    Look 566 Rival (Still here but on my trainer)
    Look 765 (sold, but not forgotten)

  2. #2
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    When you ran the cassette without the spacer, was the rear derailleur hitting the spokes when in the 42? If there was sufficient clearance & the cassette wasn't loose & shifting was fine, I would just leave that spacer off. I run a Force 1170 cassette & have never used a spacer with it.

  3. #3
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    Ran the cassette for approximately 500 miles with no shifting problems. Just wasn’t certain the lack of a spacer could cause long term problems.
    Steve
    Lynskey R300 disc SRAM 1x
    Lynskey titaniium seatpost
    Speedplay ultralight action pedals
    SMP Drakon saddle
    Redshift shock absorption stem
    Mavic Pro Carbon wheels

    Look 566 Rival (Still here but on my trainer)
    Look 765 (sold, but not forgotten)

  4. #4
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    As long as the lock ring isn't bottoming out before getting enough torque it should be fine. I suppose the chain line will be a little off from what it was designed to be but if it works it works.

    But doing it right should be fine too. I would just use the spacer. Especially if you plan to use other wheels or cassettes with a 'normal' cassette so you don't have to adjust every time or make the adjustments needed a lot smaller.

    I wouldn't worry about doing any damage though.

  5. #5
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    Steve
    Lynskey R300 disc SRAM 1x
    Lynskey titaniium seatpost
    Speedplay ultralight action pedals
    SMP Drakon saddle
    Redshift shock absorption stem
    Mavic Pro Carbon wheels

    Look 566 Rival (Still here but on my trainer)
    Look 765 (sold, but not forgotten)

  6. #6
    'brifter' is f'ing stupid
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    That 11 cog looks a little far way from the inside of the dropout, I'd try the spacer and see how it looks.
    #promechaniclife

  7. #7
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    Quote Originally Posted by cxwrench View Post
    That 11 cog looks a little far way from the inside of the dropout, I'd try the spacer and see how it looks.
    Thanks. Will do that tomorrow.
    Steve
    Lynskey R300 disc SRAM 1x
    Lynskey titaniium seatpost
    Speedplay ultralight action pedals
    SMP Drakon saddle
    Redshift shock absorption stem
    Mavic Pro Carbon wheels

    Look 566 Rival (Still here but on my trainer)
    Look 765 (sold, but not forgotten)

  8. #8
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    Quote Originally Posted by 1Lieutenant View Post
    Thanks. Will do that tomorrow.
    The bottom line is you have a cassette that is to be used with the spacer and unless your drop out is bent of deformed doing so won't be a problem. It's probably just closer than you envisioned. I remember thinking the same years ago with I first started looking closely at such things.

    'getting away with' not using one is kinda a different topic all together.

    Think of it this way: If you can't use that cassette with the spacer you could not use a 'normal' one without the spacer and if that is the case (99.9% it's not) you have much bigger issues.

  9. #9
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    That 1.8mm spacer will be more important with cassettes having a smaller larger cog. The smaller the largest cog is, the closer the der pulley cage will get to the spokes. Running the der pulley into the spokes results in a big mess. With a 42T large cog, the pulley cage should clear the spokes by a good margin with or without the spacer.

    Having said that, I would include the spacer so you don't have to mess around with der adjustments should you have to swap rear wheels.

  10. #10
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    Quote Originally Posted by RHankey View Post
    That 1.8mm spacer will be more important with cassettes having a smaller larger cog. The smaller the largest cog is, the closer the der pulley cage will get to the spokes. Running the der pulley into the spokes results in a big mess. With a 42T large cog, the pulley cage should clear the spokes by a good margin with or without the spacer.
    That's not the case. He wouldn't use a spacer with a smaller cassette.

  11. #11
    tlg
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    Quote Originally Posted by 1Lieutenant View Post
    Is there a reason why this spacer is mandatory?
    Sram says the 11-42t cassette is compatible with 1x drivetrains only.

    I imagine the spacer is to shift the cassette and reduce the extreme chainline.
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  12. #12
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    You could look at it that way but that's more a byproduct It's really just to put the thing where it belongs to be in the same position as a 'normal' 11 speed cassette.

    Due to size these massive cassette cogs can sort of 'shape around' where the spokes join the hub and end up taking up less space on the free hub then a normal smaller one. That allows them to still work on 10 speed hubs. But also means you should use the spacer on 11 speed hubs.

    Basically it's exactly the same deal as using a 10 speed cassette on an 11 speed hub. But because the the big cog is so big they can move it inboard thus fitting 11 cogs without taking up more freehubs space than a 10 speed cassette.

    Shimano has cassettes like this also that are not designed just for 1x. They are sold as MTN bike cassettes.
    Last edited by Jay Strongbow; 06-01-2020 at 05:57 AM.

  13. #13
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    Picture with spacer in place.

    Here is a picture with the spacer in place. Small cog is quite close to the dropout, but the chain has approximately 1 mm clearance.

    ED0EB414-CE5D-456E-9549-ABE0C5097087.jpg
    Steve
    Lynskey R300 disc SRAM 1x
    Lynskey titaniium seatpost
    Speedplay ultralight action pedals
    SMP Drakon saddle
    Redshift shock absorption stem
    Mavic Pro Carbon wheels

    Look 566 Rival (Still here but on my trainer)
    Look 765 (sold, but not forgotten)

  14. #14
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    Took a bit of adjustment, but everything is working fine. The chain clears the dropout by 1 mm but absolutely no chain rub. Shifting is the same. It may be psychological, but it seems quieter. Never was noisy, though. Thanks all for your input.

    Any further thoughts welcome.
    Steve
    Lynskey R300 disc SRAM 1x
    Lynskey titaniium seatpost
    Speedplay ultralight action pedals
    SMP Drakon saddle
    Redshift shock absorption stem
    Mavic Pro Carbon wheels

    Look 566 Rival (Still here but on my trainer)
    Look 765 (sold, but not forgotten)

  15. #15
    'brifter' is f'ing stupid
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    I'd like to know how you've been here nearly 8 years but can't attach photos. I know that's barely over 5 posts per year but c'mon...
    #promechaniclife

  16. #16
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    Quote Originally Posted by cxwrench View Post
    I'd like to know how you've been here nearly 8 years but can't attach photos. I know that's barely over 5 posts per year but c'mon...
    LOL. You and me both. Each time I try to post a pic it seems to take forever and usually comes out like this. When it does work out I am quite surprised.

    That aside, your thoughts on the newest almost attached picture?
    Steve
    Lynskey R300 disc SRAM 1x
    Lynskey titaniium seatpost
    Speedplay ultralight action pedals
    SMP Drakon saddle
    Redshift shock absorption stem
    Mavic Pro Carbon wheels

    Look 566 Rival (Still here but on my trainer)
    Look 765 (sold, but not forgotten)

  17. #17
    'brifter' is f'ing stupid
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    Looks pretty dang similar to mine. Bontrager Aeolus Pro wheel, SRAM 11 speed cassette.

    #promechaniclife

  18. #18
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    Quote Originally Posted by 1Lieutenant View Post
    LOL. You and me both. Each time I try to post a pic it seems to take forever and usually comes out like this. When it does work out I am quite surprised.

    That aside, your thoughts on the newest almost attached picture?
    dude you have a cassette that should use a spacer and you are using a spacer now. Case closed.

  19. #19
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    Thank you all for taking the time to look at the pictures and providing insight. A bit odd that it came this way from the manufacturer, but that is a different story
    Steve
    Lynskey R300 disc SRAM 1x
    Lynskey titaniium seatpost
    Speedplay ultralight action pedals
    SMP Drakon saddle
    Redshift shock absorption stem
    Mavic Pro Carbon wheels

    Look 566 Rival (Still here but on my trainer)
    Look 765 (sold, but not forgotten)

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