73mm BSA w/ Boost Rear Hub- Mtbr.com
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  1. #1
    BrassBalled DropbarNinja
    Reputation: mrpercussive's Avatar
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    73mm BSA w/ Boost Rear Hub

    Got a new frame and it's a 73mm BSA and Boost rear. If I run a regular set of cranks say Shimano XT for regular 73mm BSA, chainline should be alright with Boost? I'm not too familiar with all these new standards. Just know that when I was running 12X150mm on DH bikes i'd run an 83mm BSA... Can anyone confirm? Thanks!

  2. #2
    mtbr member
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    if it (the chainring) clears it will be better than alright.... the non boost front ring chain line is improved if the casette is relatively further out. (by design it favours the chain sitting more towards the smaller cogs).

    the problem would only be if the chainring does not clear the chain stay or a swing arm...which seems to be generally unlikely to happen, unless you run bigger than average (32?) tooth rings.
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  3. #3
    BrassBalled DropbarNinja
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    Quote Originally Posted by dRjOn View Post
    if it (the chainring) clears it will be better than alright.... the non boost front ring chain line is improved if the casette is relatively further out. (by design it favours the chain sitting more towards the smaller cogs).

    the problem would only be if the chainring does not clear the chain stay or a swing arm...which seems to be generally unlikely to happen, unless you run bigger than average (32?) tooth rings.
    Sick! Thanks!!!

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