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  1. #1
    ninja scr1be's Avatar
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    cranks, bmx and mtb.

    are bmx cranks really stronger than mtb cranks?

    i need to buy new cranks in a couple months, so i'm just wondering why i see so many bikes at unrealcycles with profile bmx cranks instead of mtb cranks. is there an advantage?

    i was just going to get some holzfellers, but read somewhere that bmx cranks are stronger, so just wanted to see what that was all about.
    trek bruiser 1

  2. #2
    Canon fiend MadMan2k's Avatar
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    They are stronger as far as I know, but they're also a lot heavier. Which is fine for a DJ/street bike, but for general purpose freeride with maybe a little XC, aluminum cranks and a good bottom bracket should be good enough.

    Profiles are probably one of the most durable cranksets around, although one of the DH cranks with ISIS BB might come close.

  3. #3
    Chris King? Chris Bling. FMFBMX's Avatar
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    Profile makes BMX and mountain bike are you sure there the BMX version because profile does BMX racing and mtn biking.
    Vrooooooooom!

  4. #4
    Senior Member alcahueteria's Avatar
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    I'm not sold on bmx cranks, mainly because I tore through three bottom brackets in like 2 months. They were Euro style, so I guess American would hopefully be stronger. I ended up going with evolve dh cranks with the external bb. A bit heavy but, damn, I love them. So smooth. There's even a few mm chainline adj with the spacers.

  5. #5
    Gravity hunter dminor's Avatar
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    BMX cranks are mega-stronger; and heavy too. Most run a soild (or near-solid) BB spindle with a 48-spline BMX pattern. FSA makes one too. The crank arms are hollow chromoly and shaped like an aluminum arm and the BB is a solid 48-spline with three bearings (two on the drive side). But, really, it's overkill unless you're Bender...or weigh 250# and kill everything else. The Holzfeller's should do you fine, or look at the FSA Pounder.

  6. #6
    Wood Licker Maelstrom's Avatar
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    Signifigantly heavier. I have a set of profiles that are insanely heavy. I know they won't break, but holy crap they outweigh any other set I have.

  7. #7
    Svr
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    Senior Member Svr's Avatar
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    Definately stronger, and a bit heavier.

    To put the weight in perspective, Profile cranks with a euro bb will add about a pound to your ride, that is if you had weenie-light cranks installed at first. Most people that freak out over the weight don't consider that the profile system includes the bb and spindle.

    A set of euro bb profiles without the spider or rings weighs about 1100g.

    A set of typical MTB crank arms with rings plus a BB weighs in about 900g.

    Figure once you add a spider and rings to the profiles, it'll add a little under a pound to your bike.

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