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Bottom bracket advice plz

freeride-mikefreeride-mike Posts: 552
edited January 2010 in MTB workshop & tech
hello need some advice, ive always had square taper bb so dont know much about the new splined 1's what i want to know is at the moment i have a shimano dx un52 (i think) square taper bb and have seen a set of truativ single ring cranks with splined bb will these fit my frame the same as the un52????

thanks in advance

mike
CUBE ltd 2012,reba sl, XT, saint, DMR, spank, current xc/am ride

GIANT boulder, marzzochi EXR, LX/alivio, DMR, spank, retro build

Posts

  • nicklousenicklouse Posts: 81,520 Lives Here
    might.

    more info needed.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • what do u need to know??

    these are what im looking at...


    http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT
    CUBE ltd 2012,reba sl, XT, saint, DMR, spank, current xc/am ride

    GIANT boulder, marzzochi EXR, LX/alivio, DMR, spank, retro build
  • nicklousenicklouse Posts: 81,520 Lives Here
    everything.

    your bb size the part number of the new axle length bb etc etc
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • ok, can i measure the bb length while still in the bike frame??
    CUBE ltd 2012,reba sl, XT, saint, DMR, spank, current xc/am ride

    GIANT boulder, marzzochi EXR, LX/alivio, DMR, spank, retro build
  • I wouldn't bother either way... ISIS drive is censored . It lasted less than a week on my bike, I gott annoyed with it and bought a HT2 crankset.

    correctly fitted HT2 is where its at.... i'd save a bit more and go for this.
    http://www.chainreactioncycles.com/Mode ... elID=40496

    do you actually want a single ring upfront though? I take it this is for the Giant?
  • nicklousenicklouse Posts: 81,520 Lives Here
    ok, can i measure the bb length while still in the bike frame??

    no the "new" one.

    and your frame bb width.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • bigbenj_08 wrote:
    I wouldn't bother either way... ISIS drive is censored . It lasted less than a week on my bike, I gott annoyed with it and bought a HT2 crankset.

    correctly fitted HT2 is where its at.... i'd save a bit more and go for this.
    http://www.chainreactioncycles.com/Mode ... elID=40496

    do you actually want a single ring upfront though? I take it this is for the Giant?

    yes its for my giant, TBH i'd rather not change the bb at all as its only been in 3wks but finding cheap 2nd hand single ring stuff in square taper is proving hard :cry:
    CUBE ltd 2012,reba sl, XT, saint, DMR, spank, current xc/am ride

    GIANT boulder, marzzochi EXR, LX/alivio, DMR, spank, retro build
  • how come single ring?
    Sell the BB!
  • nicklouse wrote:
    ok, can i measure the bb length while still in the bike frame??

    no the "new" one.

    and your frame bb width.


    sorry "doh" will measure it and post, and try n get the new bb part number too
    CUBE ltd 2012,reba sl, XT, saint, DMR, spank, current xc/am ride

    GIANT boulder, marzzochi EXR, LX/alivio, DMR, spank, retro build
  • bigbenj_08 wrote:
    how come single ring?
    Sell the BB!


    hardly ever used the front rings on my triple so ditched my shifter and front mech just need a single ring crankset now as my rings are riveted together :?

    what are the different bb's then coz im not up on new stuff :( ive only ever used square taper???
    CUBE ltd 2012,reba sl, XT, saint, DMR, spank, current xc/am ride

    GIANT boulder, marzzochi EXR, LX/alivio, DMR, spank, retro build
  • ahh fair enough.

    I'd still buy the deore in 26.36.48. then you don't even need to buy a new chainring.

    Oh and it comes with BB.... you'd need some sort of chainguide though but you could just use your front mech.
  • new splined bb: 73mm shell and 118mm shaft

    my frame measure's 67mm accross and the bb in it is 73mm accross??

    just waiting on part number.

    cheers nicklous
    CUBE ltd 2012,reba sl, XT, saint, DMR, spank, current xc/am ride

    GIANT boulder, marzzochi EXR, LX/alivio, DMR, spank, retro build
  • stumpym4stumpym4 Posts: 216
    If your still after a chainset to fit your square taper BB , then look at this truvativ one , £12 :shock: :shock: :shock:
    and you can lose the other 2 rings if needed ?

    http://www.chainreactioncycles.com/Mode ... elID=34261

    Tony
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    On One 853 single speed
    Pinnacle Arkose 2 - cross bike
    Pinnacle Ramin 3 plus - Bike packing bike
    Cube attain GTC Pro road bike - more relaxed road bike
    Giant scr1 road bike
  • nicklousenicklouse Posts: 81,520 Lives Here
    new splined bb: 73mm shell and 118mm shaft

    my frame measure's 67mm accross and the bb in it is 73mm accross??

    just waiting on part number.

    cheers nicklous

    so your bb is 68mm

    and the new bb is 73mm.

    see any problems yet?

    is it an ISIS bb? if yes did you get the spacers and the o ring?

    118mm axle is a bit wide for a standard MTB
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • nicklouse wrote:
    new splined bb: 73mm shell and 118mm shaft

    my frame measure's 67mm accross and the bb in it is 73mm accross??

    just waiting on part number.

    cheers nicklous

    so your bb is 68mm

    and the new bb is 73mm.

    see any problems yet?

    is it an ISIS bb? if yes did you get the spacers and the o ring?

    118mm axle is a bit wide for a standard MTB

    no worries, its too big then. will keep looking
    CUBE ltd 2012,reba sl, XT, saint, DMR, spank, current xc/am ride

    GIANT boulder, marzzochi EXR, LX/alivio, DMR, spank, retro build
  • stumpym4 wrote:
    If your still after a chainset to fit your square taper BB , then look at this truvativ one , £12 :shock: :shock: :shock:
    and you can lose the other 2 rings if needed ?

    http://www.chainreactioncycles.com/Mode ... elID=34261

    Tony

    hink the rings are riveted together on these :?
    CUBE ltd 2012,reba sl, XT, saint, DMR, spank, current xc/am ride

    GIANT boulder, marzzochi EXR, LX/alivio, DMR, spank, retro build
  • bails87bails87 Posts: 13,317
    I've got it on an old bike, sure they come apart.
    MTB/CX

    "As I said last time, it won't happen again."
  • stumpym4stumpym4 Posts: 216
    stumpym4 wrote:
    If your still after a chainset to fit your square taper BB , then look at this truvativ one , £12 :shock: :shock: :shock:
    and you can lose the other 2 rings if needed ?

    http://www.chainreactioncycles.com/Mode ... elID=34261

    Tony

    hink the rings are riveted together on these :?

    Have a closer look at the pics , the chainrings have bolts through them
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    On One 853 single speed
    Pinnacle Arkose 2 - cross bike
    Pinnacle Ramin 3 plus - Bike packing bike
    Cube attain GTC Pro road bike - more relaxed road bike
    Giant scr1 road bike
  • stumpym4stumpym4 Posts: 216
    According to truvativs web page they use steel chainring bolts !

    Tony
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    On One 853 single speed
    Pinnacle Arkose 2 - cross bike
    Pinnacle Ramin 3 plus - Bike packing bike
    Cube attain GTC Pro road bike - more relaxed road bike
    Giant scr1 road bike
  • shud have gone to spec savers lol :oops:
    CUBE ltd 2012,reba sl, XT, saint, DMR, spank, current xc/am ride

    GIANT boulder, marzzochi EXR, LX/alivio, DMR, spank, retro build
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