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Shimano/SRAM Compatibility

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  • September 9, 2019 at 9:29 am #30097
    Huckfinn

    Hello all.

    So, on my Canyon Grail Carbon gravel (the one with the “distinctive” handlebar) I’d like to replace the 11-34 11speed cassette with an 11-36.

    At Chainreaction they suggest:  SRAM PG1130 + the KMC X11 11 Speed Chain + the RoadLink.

    They say, though, that it’s not ideal to mix and match Shimano and SRAM parts at the higher 11 speed range…

    Do you guys think it’s feasible nevertheless?

    Another option would be: keep cassette and simply replace the 34t in the 50-34 crankset with a 32?

     

    Thanks for any feedback!

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  • September 13, 2019 at 12:25 pm #949669
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    Huckfinn

    Great, thanks for that.

    Great, thanks for that.

    September 12, 2019 at 12:36 pm #949667
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    Huckfinn

    Ok, 

    Ok, 

    I use it reasonably often when riding with friends. Could be just because of the fun coming from 20years of a 3x9speed mtb. 42-11 max with 26″ wheels. Used to spin out like crazy downhill…

    46-11 is really a bit on the “low” side. I tried it. But tell me: if I decide to swap chainrings,of the ones you now, which 48-32 would you advise, cost per lb? Ovals maybe?…

    September 12, 2019 at 7:18 am #949665
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    Huckfinn

    Dicklexic & John Stevenson :

    Dicklexic & John Stevenson : thanks for that.

     

    I was thinking about the Praxis ALBA 48-32 (or similar) option. Accepting that I won’t have the slight advantage of the 50t, and considering that there are some rather steep climbs were I live (South-East France), would you guys reckon it’s “better” to have a 32 front /34 back or 34 front (as is now) /36 back?.

    Is there some dummies way to calculate that? I mean:

    32:34×28=26.35, 34:36×28=26.44, basically the same mathematically, but which one would be better for climbing?… Are they in fact equal?

    September 11, 2019 at 4:04 pm #949663
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    Dicklexic

    +1 for the Sunrace RX11

    +1 for the Sunrace RX11 cassette option.

    I have mixed and matched Shimano/SRAM 11spd cassettes on all my bikes without issues in the past, and am currently running a Sunrace RX11 11-32 on one wheelset,  Shimano 105 11-34 on another, and SRAM on a third, swapping all the wheels between Ultegra 6800 on the road bike, and SRAM Force 1x on the CX bike as needed.

    I have found no issues with the 11-34 cassette on the Ultegra 6800, despite it being officially limited to a 32 tooth, so I would expect an 11-36 to work fine on an R8000 mech which is rated for a 34 max. sprocket.

    September 11, 2019 at 3:09 pm #949661
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    Huckfinn

    Thanks to all!

    Thanks to all!

    @John Stevenson : it’s an RX800 GS. So all good for the 11-36, which is great! The unknown factor is wether the RX800 GS would work with the 11-40, right?

    HAS ANYONE tried that yet…???

    Thanks for the Praxis suggestion. Although reasonably cheap (just over 100euros on bike24), I would miss the big 50…. Same for the advice from fukawitribe .

    September 11, 2019 at 7:43 am #949659
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    Huckfinn

    Cool.

    Cool.

    September 11, 2019 at 5:42 am #949657
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    Wafty Crank
    Huckfinn wrote:
    Great, thanks for that.

    The Sunrace would work with the R8000 setup as well?

    I’ve never used R8000, sorry, but according to this https://road.cc/content/feature/246424-how-get-ultra-low-gearing-gravel-bike-adventures the R8ooo and R7000 look geometrically the same.

    September 10, 2019 at 7:26 am #949655
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    Huckfinn

    Great, thanks for that.

    Great, thanks for that.

    The Sunrace would work with the R8000 setup as well?

    September 10, 2019 at 12:06 am #949653
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    Wafty Crank

    FWIW I know that a Sunrace

    FWIW I know that a Sunrace CSRX1 11-36 works fine with an R7000 GS rear derailleur.   CX bike I bought came with 46/36 and 11-28.  I wanted (needed) lower gearing so changed the RD to GS and bought the Sunrace cassette.  No problems at all so far (and I think the Sunrace cassette is lighter than the SRAM one if that matters).

    September 9, 2019 at 7:17 pm #949651
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    Anonymous

    I’ll add my two cents worth..

    I’ll add my two cents worth…

    No issues at all mixing 11 speed SRAM and Shimano – Chain Reaction talking bollocks (not unusual).

    I agree with fuckawitribe, try the 11-36 before buying an extender. Shimano are always conservative with what they ‘say’ will work because they won’t recommend changing parts that might not be 100% perfect. For example I had an 11-34 10 speed cassette working very well with a short cage Dura Ace 7800 derailleur – B screw was screwed all the way in. I think you’ll be fine with the 11-34 and judicious tinkering with the B screw.

    I agree with vonhelmet – a smaller inner chainring is needed for proper off-road gravel stuff… unless you are happy walking the steep stuff.

    September 9, 2019 at 6:55 pm #949649
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    Huckfinn

    @fukawitribe: thanks. Good

    @fukawitribe: thanks. Good news! Any cassette or should I just go for a Shimano one?

    @vonhelmet: I use the 50t too often to replace it… ;-))

     

    PS: I guess once the new cassette is on and running I could try the OneUp Components’ 42t Sprocket !!:

    https://bikerumor.com/2013/11/28/exclusive-take-your-cassette-to-the-next-level-with-oneup-components-42t-sprocket/

    September 9, 2019 at 5:59 pm #949647
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    vonhelmet

    50/34 seems like too big a
    50/34 seems like too big a chainset for a gravel bike. I’d be dropping the chainset for a smaller one, 46/30 as suggested.

    September 9, 2019 at 5:12 pm #949645
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    fukawitribe
    Huckfinn wrote:
    I think I’ll stick to the cassette/derailleur mod…

    You guys reckon I could either use a Roadlink with existing medium cage derailleur OR replace the derailleur with the new GRX one?

    I’d be tempted to try the existing rear mech with the cassette before trying a RoadLink or getting a new one – feedback from various places online seems to indicate it could well work with either winding the B-tension screw in or reversing it; when I went to an 11-34T from an 11-32T (fully supported) I didn’t need to even need to adjust it on a Shimano 6800 medium cage so I wouldn’t be surprised if it went at least a couple of teeth more with minimal furtling..

    September 9, 2019 at 1:31 pm #949643
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    Huckfinn

    I think I’ll stick to the

    I think I’ll stick to the cassette/derailleur mod…

    You guys reckon I could either use a Roadlink with existing medium cage derailleur OR replace the derailleur with the new GRX one?

    Joe Totale : saw your post only now. Thanks for that!

    September 9, 2019 at 1:07 pm #949641
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    Woldsman
    Huckfinn wrote:
    … Another option would be: keep cassette and simply replace the 34t in the 50-34 crankset with a 32? …

    I’ve read about the possibility of fitting a 33T to a compact chainset, but not a 32. As well as the bolt circle diameter (BCD) of your existing chainset there is also the variable of whatever make and model you currently have (mine, for instance, is a Shimano Ultegra 6750 model). Given that you have a compact chainset and and 11-34 cassette you’re just about at the limit of what you can do with your existing rear mech and chainset IMHO.  There may be an option for a rear mech extender and, say, an 11-40 cassette, but it’s a bit hit and miss really. 

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