Crankset

[Easytigers]

Hi there,

Apologies in advance. I've been cycling for quite a while now but am not mechanically minded! I've just been given a carbon frame and am trying to source a crankset for it. All I've been told is that is a standard British thread but I'm unsure as to whether I need external bearings, square tapered bb etc. I've never understood all of that stuff...Do all frames require a bespoke bottom bracket or are most standard while there are exceptions e.g. BB30? Also do some frames only accept external bearings and others square tapered/press fit.

I've seen this and to me I think it would be ok...what else do I need to buy and would it fit? I'm guessing a Tiagra/105 BB??? I'm so out of my depth!!!

http://www.ebay.co.uk/itm/Shimano-1...sure_Cycling_BikeLocks_SR&hash=item3a9962cdcd

All help welcome and thank you in advance...

 

[Dangermouse]

All you need is a standard English thread BB the design is up to you but personally I would go for Shimano HT II that way you have the choice of Tiagra up to Dura Ace chainsets to put in, if its a threaded BB shell then forget any press fit bearings, they wont fit.

This will be ideal
http://www.ebay.co.uk/itm/Shimano-B...sure_cycling_bikeparts_SR&hash=item51bb322b31

 

[mrandmrspoves]

If it is standard British thread it will take a screw in cartridge such as a Shimano UN55. What you have linked to would work with an external bearing - your frame may be ok to take an external bearing - but the frame probably would need "facing" to ensure the bearings are exactly parallel - and that's a job for a good bike shop. BBB30 and variants are push fit so don't go into a threaded bottom bracket cup.

 

[derrick]

Rotor cranks and bearings. Q rings or normal. there ain't nothing else.