Ashima rotor bolts

Anonymous
Anonymous Posts: 79,667
edited July 2012 in MTB buying advice
Hi,
Guys recently bought sum red ashima light weight rotors bolts, however I decided to change the color, drama is the lbs who fitted them used thread lock and nearly every bolt rounded off trying to get them out,

The new ones ain't fitted yet but my dilemma is are these to soft or was there to much thread lock applied to start off with as these are no more than 4 nn
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Comments

  • Chunkers1980
    Chunkers1980 Posts: 8,035
    What are 4nm?

    They will be very soft.
  • cooldad
    cooldad Posts: 32,599
    Anodised aluminium?
    Bad move for rotor bolts IMO.

    But threadlock is recommended, so that's not the problem.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

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  • cat_with_no_tail
    cat_with_no_tail Posts: 12,981
    The Ashima bolts are made of a very soft type of cheese. I believe the same stuff they make MOWA bolts from.

    When it comes to rotor bolts, steel is real imho.
    "Avan-TT"
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  • njee20
    njee20 Posts: 9,613
    Mmm, I've got some of the alu rotor bolts and they are insanely soft, slightly concerned about how I'm gonna get mine out!
  • Anonymous
    Anonymous Posts: 79,667
    4nm is te Torq setting
    Only concern now do I use these new ones or revert to te standard ones that look cack
  • cooldad
    cooldad Posts: 32,599
    They're rotor bolts for gods sake. Just use what's sensible, aluminium is not.
    It's a mountain bike, not a drag queen.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

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  • Chunkers1980
    Chunkers1980 Posts: 8,035
    Setting on what? Hub or bolt? Not that it matters.
  • njee20
    njee20 Posts: 9,613
    Whilst you're right CD they are marketed as rotor bolts, and are what Ashima include as standard with their PCB brakes, so one would be lead to believe that they'd be a little more reliable than they actually are. Never had any problems with alu bolts rounding otherwise.

    Doesn't help they're T20 heads rather than T25.
  • cooldad
    cooldad Posts: 32,599
    I know that, just now that I am old and wise, I prefer not to tempt fate too much. The older you get the longer the pain lingers.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

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  • nicklouse
    nicklouse Posts: 50,675
    cooldad wrote:
    I know that, just now that I am old and wise, I prefer not to tempt fate too much. The older you get the longer the pain lingers.
    And you don't bounce as well or as long.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
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  • cooldad
    cooldad Posts: 32,599
    nicklouse wrote:
    cooldad wrote:
    I know that, just now that I am old and wise, I prefer not to tempt fate too much. The older you get the longer the pain lingers.
    And you don't bounce as well or as long.
    Nope, just splat.


    ps it's not the rounding that worries me, it's the shearing.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

    London Calling on Facebook

    Parktools
  • nicklouse
    nicklouse Posts: 50,675
    cooldad wrote:
    nicklouse wrote:
    cooldad wrote:
    I know that, just now that I am old and wise, I prefer not to tempt fate too much. The older you get the longer the pain lingers.
    And you don't bounce as well or as long.
    Nope, just splat.


    ps it's not the rounding that worries me, it's the shearing.
    we used to use alloy caliper bolts on a DH bike.

    Changed them after every run.

    Some were ok some were not.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • njee20
    njee20 Posts: 9,613
    Meh, there's 6 bolts, I weigh 11 stone, I'm happy enough.

    Did have alu caliper bolts on my XX brakes, they didn't break.
  • YeehaaMcgee
    YeehaaMcgee Posts: 5,740
    The trouble I've found with all small Torx bits, is that you need some exceptionally high quality tools to prevent rounding off.
    Even tools that are generally "OK", can lead to problems.

    Anyway, the sensible answer to all this is to forego rotor bolts completely, and use Shimano's centrelock system :wink:
    My photos
  • cooldad
    cooldad Posts: 32,599
    njee20 wrote:
    Meh, there's 6 bolts, I weigh 11 stone, I'm happy enough.

    Did have alu caliper bolts on my XX brakes, they didn't break.
    Luckily, which is why you are not dead.

    I still have no idea what stones are, but I suspect I weigh a few pebbles more than you.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

    London Calling on Facebook

    Parktools
  • Anonymous
    Anonymous Posts: 79,667
    Solved it went ti bolts lol
    Cheers lads
    These going cheap brand new lol
  • nicklouse
    nicklouse Posts: 50,675
    Still not as strong as steel in shear.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • Anonymous
    Anonymous Posts: 79,667
    I'm a weight weenie nick ..
  • YeehaaMcgee
    YeehaaMcgee Posts: 5,740
    raceface gt wrote:
    I'm a weight weenie nick ..
    Fine line between weight weenie and idiot.
    My photos
  • nicklouse
    nicklouse Posts: 50,675
    raceface gt wrote:
    I'm a weight weenie nick ..
    I know a guy who changed all his stem bolts to alloy ones on his DH bike.

    Was fun watching him carry his bike down the hill on his race run.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • Anonymous
    Anonymous Posts: 79,667
    I'm xc only lol
  • Tintin rize
    Tintin rize Posts: 262
    Well, if each bolt was filled with lock thread ,I'm not surprise that we rounded each off :cry:
    Cannondale RZ 140 (WIP) (24.35lbs ) full suspension
    viewtopic.php?f=10017&t=12860378
  • rockmonkeysc
    rockmonkeysc Posts: 14,774
    Take a look at the shear capacity of aluminium compared to steel. I would never use aluminium bolts on brake rotors.
    Transition Patrol - viewtopic.php?f=10017&t=13070235
  • njee20
    njee20 Posts: 9,613
    Again, I imagine Ashima must have a degree of confidence in them to supply them OEM with a brake they sell in the US. If you believe their blurb they're a fair bit tougher than 'normal' alu bolts.

    A friend of mine used to run aluminium bolts everywhere (stem included) and never had any issues, there is a line for me though!
  • Anonymous
    Anonymous Posts: 79,667
    Updated to sum quality ti bolts,,
    As for the ashima bolts found the perfect place and fit like a glove
    f620347b.jpg
  • YeehaaMcgee
    YeehaaMcgee Posts: 5,740
    raceface gt wrote:
    Updated to sum quality ti bolts
    What's a "sum quality" bolt?
    My photos
  • njee20
    njee20 Posts: 9,613
    Don't really get buying Ti bolts except as an absolute finishing thing, such an expensive way to save weight!
  • Anonymous
    Anonymous Posts: 79,667
    YeehaaMcgee wrote:
    raceface gt wrote:
    Updated to sum quality ti bolts
    What's a "sum quality" bolt?
    Typo

    Ordered a set of good quality ti bolts from ti bolts uk
  • Anonymous
    Anonymous Posts: 79,667
    Njee20

    I know but I'm running out of upgrades now apart from wear n tear items looking into carbon crank or newer xtr variant
  • njee20
    njee20 Posts: 9,613
    New XTR is hard to beat, few carbon cranks are lighter (or even comparable) unless you spend far more.

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