• Is there a similar 11 - 30 11 speed MTB cassette I could put on there and would it work with my 105 chain?

    Don't think so. I think the smallest Shimano 11 speed MTB cassette is the 11-34 also badged up as an Ultegra cassette.

    changing the freehub to one of these will let me run 11 speed 105 cassettes right?

    On a Shimano M675 hub? Nope.

    You could get a road 11-30 11-speed cassette machined to fit a 10 speed freehub. That may be easiest.

  • On a Shimano M675 hub? Nope.

    Ah. Poor formatting / asking on my part.

    I have a D712SB hub. Currently 10 speed. Would like 11 speed on there. I think swapping the freehub I've linked to should let me run an 11 speed road cassette right? No? whine.

  • I have a D712SB hub. Currently 10 speed. Would like 11 speed on there. I think swapping the freehub I've linked to should let me run an 11 speed road cassette right? No? whine.

    Gotcha. Don't think so. That's a B2 and I think the D712SB takes a B1 freehub with a different sized seal.

    There's useful if not entirely clear information here on Novatec freehub compatibility.

  • There's apparently a 11 speed freehub
    http://www.nguide.eu/hubs/d712sb-b12

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