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Thread: All about Axels

  1. #1
    Senior Member Berylbite's Avatar
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    All about Axels

    I'm about to buy an expensive Hub for my polo bike and I don't know much about Axel deminsions and if they perform differently.

    Maybe it's just a question of compatibility?


    Above all else, this hub must have a bolt on axel, not a quick release.

    If anyone has a link to some info I'd be greatful.
    Twaffles & Twaffles bike co. Mobile AL

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    It's axle, and performance is not an issue with any decent quality hub - which covers pretty much anything that is sold new separately. You need to also pay attention to the OLD (distance from locknut to locknut) so that it is compatible with the distance between dropouts, and that the number of holes match the rim you plan to use. You don't say whether it's a front hub or a rear - the latter of which brings in other complications, as apparently some play bike polo on derailleur bikes, some on single freewheel, some on fixed gear. Need more detail. For general info on hubs Google sheldon bicycle hub.


    p.s. the squiggly red line that should have appeared under "deminsions" means you spelled it wrong.
    Last edited by cny-bikeman; 04-03-14 at 07:43 AM.
    There's no such thing as a routine repair.

    Don't tell me what "should" be - either it is, it isn't, or do something about it.

    If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

    Please take the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!

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    Senior Member armybikerider's Avatar
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    Like AXEL Merckx?.....son of arguably the worlds best ever bicycle racer......OHHHH you mean axles??? :-)
    [SIGPIC][/SIGPIC]

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    Quote Originally Posted by cny-bikeman View Post
    . . .p.s. the squiggly red line that should have appeared under "deminsions" means you spelled it wrong.
    Maybe they're demonic. =)
    Maybe he'll be greatly grateful.

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    coprolite fietsbob's Avatar
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    coprolite fietsbob's Avatar
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    Mobile Alabama has bike shops, drop by any of them and do a show and tell , there, so the subject is clear.

    AS it was not clearly stated .. here.

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    Andrew R Stewart Andrew R Stewart's Avatar
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    Quote Originally Posted by fietsbob View Post
    Mobile Alabama has bike shops, drop by any of them and do a show and tell , there, so the subject is clear.

    AS it was not clearly stated .. here.
    I thought that the OP misspelled his location. That he was a wondering guy named Al... Andy.

  8. #8
    Senior Member Berylbite's Avatar
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    I appologize for the grammer errors, I've been living in France for the year and I've learned to ignore any and all underlined words when I type in english on these computers.

    As for the additional information, I know everything I need to know about hubs. I'm buying a front hub. Namely the Hope Pro 2 evo.

    What dimensions are being described when the specs say 9mm or 12mm axle?

    I'm struggling to find a hub that has a 9mm axle which is also a bolt on hub.

    I want a 9mm axle because the builder who's making the fork says that's what he uses.

    My intuition tells me that it's describing the diameter of the axle.

    Furthermore, performance is always in question. I want strength over weight in this case. After having snapped axles in the past, a wider diameter is more appealing to me.
    Last edited by Berylbite; 04-04-14 at 05:35 AM.
    Twaffles & Twaffles bike co. Mobile AL

  9. #9
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    The fork can easily be modified to take the diameter axle you need. Performance can mean a lot of things, but normally with hubs axle strength is not one of them. Most often what is meant is low friction, and neither friction nor weight is a significant variable in decent hubs. My answer was the best I could provide given the quality of the information given.

    I would argue you have a long way to go before you know everything you need to about hubs.
    Last edited by cny-bikeman; 04-04-14 at 05:55 AM.
    There's no such thing as a routine repair.

    Don't tell me what "should" be - either it is, it isn't, or do something about it.

    If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

    Please take the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!

  10. #10
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    The 9 mm and 12 mm refer to the diameter of the axle and 9 mm is by far the most common for front hubs. The 12 mm axle is probably a "through axle" intended for MTB and disc brake use and requires specific completely enclosed dropouts that are different from standard ones and cannot be made just by filing out standard ones.

    You can replace standard 9 mm quick release axles with longer, solid threaded ones to allow use of nuts in most front hubs.

    +1 Apparently there is a lot you need to learn about hubs.

  11. #11
    Senior Member ncfisherman's Avatar
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    The 12mm you are referring to is for rear hub, MTB specific applications.

    The front Hope Pro2 is convertible between standard QR(5mm diameter QR axle or bolt on), 9mm, 15mm, and 20mm. You can go ahead and rule out 15 and 20, as those are reserved mostly for suspensions forks and I'm assuming you're not grabbing a carbon fork w/ qr15.

    The stiffest option for what you are going to buy would be the 9mm. Something like this from DT Swiss, is what you would be looking at: DT Swiss - RWS Thru bolt. There are also other options out there with bolt on ends, like this from Hadley: Hadley Front 9mm X 100mm Thru Bolt* at Balle Racing

    Let's lay off the OP a bit. It doesn't seem like you guys know the difference between 9mm and standard QR either.

  12. #12
    coprolite fietsbob's Avatar
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    What dimensions are being described when the specs say 9mm or 12mm axle?
    12 mm diameter axle is 2mm oversize for normal rear frame dropout clearance , being typically 10

    I'm about to buy an expensive Hub for my polo bike
    why ? when a cheaper one will be adequate..
    Last edited by fietsbob; 04-04-14 at 09:46 AM.

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