Confused need advice on BB30 options

[Stevec047]

I am currently stripping down my old workhorse (Carrera Virtuoso) to make it into a dedicated turbo trainer bike.

I have a new 11 speed groupset which I have mixed and matched ( Sensah 11sp rear derailleur, 105 front derailleur, sensah levers, 105 cassette and FSA Omega compact crankset).

The bike currently has a sqaure taper crankset in it which is being removed but I am struggling to find a threaded BB30 bb to use for the fsa cranks.

Can anyone point me in the right direction?

 

[rogerzilla]

It can't be done. BB30 requires a larger shell in the frame. The bearings are a pressfit, not threaded. You'll need a crankset for a normal shell, like square taper or Hollowtech 2.

Edit: it seems there is a way, as Venod has linked to below.

 

[vickster]

Why do you need to change the crankset on a turbo bike?

 

[Venod]

This might help you.

https://bikerumor.com/2018/12/28/aasq-45-how-can-i-fit-a-bb30-crank-in-a-threaded-bsa-frame/

View: https://www.amazon.co.uk/BSA30-Bottom-Bracket-Rotor-Accessories/dp/B07Z9ZT589

 

[Stevec047]

Why do you need to change the crankset on a turbo bike?

The current one is pretty tatty and it was a cheaper option to replace to a FSA crankset than change chain rings and square taper bb.

 

[rogerzilla]

Never seen those before!

The article makes the common error of calling it a BSA bottom bracket when it is a BSC bottom bracket. The 1 3/8" x 24tpi shell started as a CEI (Cycle Engineers' Institute) standard, which evolved into BSC (British Standard Cycle) and was later adopted into ISO.

 

[Milkfloat]

This might help you.

https://bikerumor.com/2018/12/28/aasq-45-how-can-i-fit-a-bb30-crank-in-a-threaded-bsa-frame/

I think that article is misleading as I don’t think BB30 is as long as 104mm. BB30A might work though.

 

[Stevec047]

It can't be done. BB30 requires a larger shell in the frame. The bearings are a pressfit, not threaded. You'll need a crankset for a normal shell, like square taper or Hollowtech 2.

I thought the PF30 were pressfit versions?

 

[Stevec047]

I think that article is misleading as I don’t think BB30 is as long as 104mm. BB30A might work though.

Are these available threaded? I have searched online but all the options I can see are Pressfit?

 

[Stevec047]

This might help you.

https://bikerumor.com/2018/12/28/aasq-45-how-can-i-fit-a-bb30-crank-in-a-threaded-bsa-frame/

View: https://www.amazon.co.uk/BSA30-Bottom-Bracket-Rotor-Accessories/dp/B07Z9ZT589

Ah now that may work, not fussed about the overall quality and weatherproofing on them as they will only be used indoors.

 

[Milkfloat]

Are these available threaded? I have searched online but all the options I can see are Pressfit?

This is what you would need assuming your crank spindle is long enough (which I doubt), but and it is a big but I would suggest new cranks, in the long term it would be cheaper.
https://wheelsmfg.com/threaded-to-30mm-abec-3-bb-black.html

 

[rogerzilla]

I thought the PF30 were pressfit versions?

BB30 has circlips but the bearings are still pressed in. PF30 has the bearings in sleeves, which are then pressed in. Both can be problematic.

 

[Venod]

Are these available threaded? I have searched online but all the options I can see are Pressfit?

View: https://www.amazon.co.uk/BSA30-Bottom-Bracket-Rotor-Accessories/dp/B07Z9ZT589

 

[Stevec047]

BB30 has circlips but the bearings are still pressed in. PF30 has the bearings in sleeves, which are then pressed in. Both can be problematic.

Ah thats clarifies my confusion.

 

[Venod]

Ah now that may work, not fussed about the overall quality and weatherproofing on them as they will only be used indoors.

Check your spindle length to make sure it will be long enough.