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  1. #1
    mtbr member
    Reputation: sylvain's Avatar
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    XTR cranks are not all born equal

    Well after years of using postal scales at work i finally got myself some ;-)

    Trying to decide on a new drivetrain for next season - I checked the xtr bits i have:

    - 952 cranks in 170mm



    - 950 cranks in 170mm! (ok they have been polished, on one side and only with sandpaper, so that's gonna take off what, 2gm maximum):



    You can see the difference in size between the two which explains the 57gm difference:



    - 950 rings (used):



    - 952 rings (new):



    So with a 184gm 950 bottom bracket, lockring and crank bolts i can have a complete crankset for just over 800gm - not bad for standard-sized, top shifting quality, super stiff parts that are mostly over 5 years old.



    So i think i'll do this rather than compact cranks with a ti square bottom bracket. Will have to see if i can do with the 24 * 27 smallest gear when coupled with a Dura ace cassette ...

  2. #2
    Fuel Master
    Reputation: emkay's Avatar
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    You should try replacing the xtr rings and spider with a TA Specialites spider and rings - would make the set lighter!

  3. #3
    mtbr member
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    Well seeing as i have all those spare parts i might as well use them. And the rings are not exaclty dead heavy are they. I have got a spider though, but it's for 5 bolt, standard rings (which i also have in xtr 26/36/48 brand new - but that would be pushing it a bit on the gear ratios!).

  4. #4
    mtbr member
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    wow! thats almost the same setup i use. i have been using the arms and bb for almost five years.. but last year i changed the rings and spyder to xt. now im going to put some ti crank fixing bolts and thats it.


    hey
    ho
    lets go!

  5. #5
    mtbr member
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    Cool.

    You mean crank bolts or chainring bolts? Cos i doubt ti crank bolts would be lighter than the stock alloy ones?

  6. #6
    mtbr member
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    Quote Originally Posted by sylvain
    Cool.

    You mean crank bolts or chainring bolts? Cos i doubt ti crank bolts would be lighter than the stock alloy ones?
    i mean the crank fixing bolts, the ones that fix the bb to the crank arms.



    or if you trust aluminum, you can get these from FSA. i bet it will be lighter than ti.
    hey
    ho
    lets go!

  7. #7
    mtbr member
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    the ones that came with the xtr cranks are alloy and weigh 16gm a pair i think.

  8. #8
    mtbr member
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    mine´s where steel. dont know the weight...
    hey
    ho
    lets go!

  9. #9
    mtbr member
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    i've think you've been done!

  10. #10
    jonny_mac
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    where did you

    get the sid world cup with the nitride coated stanchions
    and the carbon crown? i knew they released it with the aluminum
    crown but i thought they had problems bonding the carbon crown
    to the nitride so they went with the "slippery silver" instead.

  11. #11
    mtbr member
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    its slipery silver, its looks gold but its not nitrid coating.

    hey
    ho
    lets go!

  12. #12
    MaLóŒ˘*size=
    Reputation: MaLoL's Avatar
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    i wonder how much weights that bike?

  13. #13
    jonny_mac
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    thats actually

    a clean build that i would feel safe riding.

  14. #14
    mtbr member
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    Quote Originally Posted by MaLóL
    i wonder how much weights that bike?
    i weight it complete and it was 9,684grams. since i weight 86kg i think i can loose at least 400grams on this bike without spending too much $$. more than that is beyond my $$ now.
    hey
    ho
    lets go!

  15. #15
    -> SickLines.com <-
    Reputation: mtb_biker's Avatar
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    Quote Originally Posted by carlos
    its slipery silver, its looks gold but its not nitrid coating.

    Those are some shiny rims.. they dont' seem to have been touched by a brake pad. I assume the picture was taken when it was new

  16. #16
    Get your freak on!
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    Those look like Shimano skewers! You should really replace those

  17. #17
    Forging Elite Awesomeness
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    Quote Originally Posted by bike_freak
    Those look like Shimano skewers! You should really replace those
    Of course they're shimano skewers, deore apparently, what's wrong with them?

  18. #18
    *****************
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    Why would different parts need to weigh the

    Quote Originally Posted by Mr. Scary
    Wow, so there are weight variances in production parts? Yet whenever one of the "supposed" weight weenies throws up a spreadsheet for their lighter than light bike-the parts are ALWAYS at the absolute bottom end of the production claim (and sometimes lower)...
    Kind of makes you wonder, doesn't it?
    same? Just because they're XTR doesn't mean all XTR over the years are the same....
    "...the people get the government they deserve..."
    suum quique

  19. #19
    mtbr member
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    Quote Originally Posted by Bikinfoolferlife
    same? Just because they're XTR doesn't mean all XTR over the years are the same....

    True, but you'd've thought that over the years the XTR parts would've gone lighter not heavier.

  20. #20
    Get your freak on!
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    Quote Originally Posted by Upandatem
    Of course they're shimano skewers, deore apparently, what's wrong with them?
    They are very heavy, can save 70grams there, for only $10 if you get cro-mo bolt-ons.

  21. #21
    mtbr member
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    you are both right. those are deore skewers and are pretty heavy. but i already choose some parts to loose weight this christmas:
    ritchey wcs (31.8) stem
    bontrager xxx lite carbon flat bar (31.8)
    post moderne bar ends
    shimano 959 pedals
    bolt on skewers

    i think i will loose at least 300grams with these changes.
    hey
    ho
    lets go!

  22. #22
    the catalan connection
    Reputation: What&son's Avatar
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    They even change cog spacing....

    Quote Originally Posted by Mr. Scary
    Wow, so there are weight variances in production parts? Yet whenever one of the "supposed" weight weenies throws up a spreadsheet for their lighter than light bike-the parts are ALWAYS at the absolute bottom end of the production claim (and sometimes lower)...
    Kind of makes you wonder, doesn't it?
    ...so go figure.....Get a CS M 900 xtr cogset and is 8 speed, but you get a CS M 960 xtr and is 9 speed !! That´s abuse.
    "Blessed is the man who, having nothing to say, abstains from giving us wordly evidence of the fact." George Elliot

  23. #23
    Forging Elite Awesomeness
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    Maybe I'm just not a 'true' WW but bolt-on's just seem like a dumb idea for anything other that a city bike. Who want's to fumble with a stupid wrench un-bolting the wheel after an exhausting race? It's hard enough after a grueling ride to un-do a skewer never mind a bolt on...oh well it's just skewers...(did that offend anyone? I forgot i'm on the WW board)

  24. #24
    nightriding is fun !
    Reputation: Big Bad Wolf's Avatar
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    Quote Originally Posted by carlos
    wow! thats almost the same setup i use. i have been using the arms and bb for almost five years.. but last year i changed the rings and spyder to xt. now im going to put some ti crank fixing bolts and thats it.


    Carlos, Peleaze level that saddle, your wife or girlfriend will be grateful
    Nice bike !!
    Titanium or Bust !

  25. #25
    Candlestick Maker
    Reputation: baker's Avatar
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    Quote Originally Posted by Upandatem
    It's hard enough after a grueling ride to un-do a skewer never mind a bolt on...
    Such an overwhelming task...

    baker

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