help me choose a bottom bracket for this crankset.

gematkinson
gematkinson Posts: 79
edited October 2008 in Workshop
hi guys.

just want to seek your advice here as i am a bit unsure as to what to do next!

basically i have this bike : http://bianchi.it/en/products2008/Road_Y8B10.aspx

i wish to buy this carbon crankset as its a good price and i think it will look very swish :-)
http://www.chainreactioncycles.com/Mode ... elID=22928


however am i correct in thinking it WILL fit my bike, but i will need to buy an ISIS bottom bracket to go with it? I cant find any info on what bottom bracket i actually have in at the moment, but i could get a new one anyway as they are not that much and iv done around 2000 miles on my current one.

so could anyone recommend me an isis bracket that will fit this new crankset for me, at a good price... or give me some pointers on what i should be looking for?

any help as always very much appreciated given a bit of a noob but trying :-)

Comments

  • Gavin Gilbert
    Gavin Gilbert Posts: 4,019
    Don't buy an Isis chainset! The BB's are extremely poor - I've destroyed 2 in a little over 2,000 miles.

    Isis seem fine for MTB's where high milage isn't a factor, but the bearings can't take the usage they'll get on the road. I've been informed to use a SKF BB, but can't find one for love or money.
  • maddog 2
    maddog 2 Posts: 8,114
    it's cheap because it's ISIS, as Gavin alludes to.

    If your yearly mileage is low (at a guess, less than 2000) then it's a possibility

    If you don't mind changing your BB regularly/annually (and can factor in the cost) then it's a possibility

    If you can find a SKF isis BB in a road width (and can factor in the cost) then it's a possibility

    If you're a waif and always ride in the sunshine then it's a small possibility



    Otherwise, avoid it and go for an external BB design (shimano's or campag's system) 8)

    [if you do buy it then a FSA platinum is a option http://www.chainreactioncycles.com/Mode ... delID=2962 ]
    Facts are meaningless, you can use facts to prove anything that's remotely true! - Homer
  • ahhh thought there might be a catch to this crank business! well the upgrade was purely cosmetic and i think knowing that id have a naff bb in is a bit annoying.

    thanks very much for the tips guys il keep looking for a new crankset!
  • A bolt through set up like: http://www.chainreactioncycles.com/Mode ... elID=11790, thats the way to go! These are stiffer and therefore more efficient. Yes, it is a lot better and the BB's will last ages.
    jedster wrote:
    Just off to contemplate my own mortality and inevitable descent into decrepedness.
    FCN 3 or 4 on road depending on clothing
    FCN 8 off road because I'm too old to go racing around.
  • thats a nice crank, what would i have to get to go with it? as im not even sure what bloody bb i have in, cant find any info from bianchi/elsewhere
  • Gazzaputt
    Gazzaputt Posts: 3,227
    ISIS is ok if light weight and on road.

    Heavy riders offroad really destroy them.

    Saying that I used FSA Ti for around 2 years with no problems. Now sitting in my parts bin unused.
  • dombat
    dombat Posts: 96
    I got fed up with busting "hollow" BB's (I'm heavy 100Kg on a fixed) so went back to the square taper Shimano sealed one's. Cheap and never had any problems.
  • ride_whenever
    ride_whenever Posts: 13,279
    superstar components do an ISIS BB that has larger SKF bearings, it is supposed to last very well and deliever on the promises isis made when first developed.
  • nielsamd
    nielsamd Posts: 174
    superstar components do an ISIS BB that has larger SKF bearings, it is supposed to last very well and deliever on the promises isis made when first developed.

    Interesting.. I had a look...
    http://www.superstarcomponents.com/BottomBracketProduct2.html
    I wonder if the cup race is a bit thin? Guess its not to scale.
    Any more opinions?

    Similar to the original poster, I am looking for an ISIS solution to these cranks:
    http://www.gbcycles.co.uk/eshop.asp?wci=product&wce=CSBIAC01&desc=BIANCHI+CARBON+CHAINSET
    No idea what spindle length though.

    Crank Bros. Cyan is a possibility as well.

    I am aware of all the ISIS complaints, but a lot originate from rough stuff MTB users and there seem to be as many satisfied people as complainants.