Chainset removal

[Certifythat]

Hello what tool would I need to remove this chainset from the bottom bracket? It's a shimano sora, photos below.

 

[Cycleops]

That's an Octalink BB which I believe is the same tool required for a square taper. Although there is a work around using the crank retaining bolt.

Hello and to CC

 

[midlife]

I thought it came with a self extracting bolt? Ordinary crank pullers a wider plug to stop it going into the hole 5 pence piece rings a bell?

 

[Ming the Merciless]

That's an Octalink BB which I believe is the same tool required for a square taper. Although there is a work around using the crank retaining bolt.

View attachment 605738
Hello and to CC

I have that in my toolbox. Thanks for reminding me which crank type it fits. Haven’t used since, well, I likely had Octalink…

 

[fossyant]

Yup, same tool as square taper but has a wider end plug - provided your tool has the interchangeable 'ends' - Park does.

 

[Cycleops]

@Certifythat Be aware when refitting that the cranks need tightening to a high setting, I think it's 50nm but check. This is because if not sufficiently tightened they are prone to becoming loose and then the the splined spindle gets to work on the soft alloy crank eventually rendering it useless. This is the reason Shimano have now discontinued the system.

 

[Gunk]

They can be an absolute bugger to remove, I’ve used a right angle plumbers spanner to slot between the crankset and frame, a long bolt, bolted into the BB, and a lump hammer.

 

[fair weather cyclist]

Slight off-topic question: is it possible to remove a square taper bottom bracket and replace it with a threaded bb (such as a shimano bbr60)?

 

[MichaelW2]

Slight off-topic question: is it possible to remove a square taper bottom bracket and replace it with a threaded bb (such as a shimano bbr60)?

The BBR60 is part of the Shimano Hollowtech II system and only works with HT2 style cranks. The BB unit is designed to fit into a standard thread frame sames as the square taper and Octalink BB unit.

Many regard the ST as more durable and less bothersome.

 

[fair weather cyclist]

The BBR60 is part of the Shimano Hollowtech II system and only works with HT2 style cranks. The BB unit is designed to fit into a standard thread frame sames as the square taper and Octalink BB unit.

Many regard the ST as more durable and less bothersome.

Thanks!

So you're saying the threads are the same and therefore it is possible to replace square taper to a BBR60. Although if I decide to do that I will of course need to change the cranks.

Great, thanks for the explanation

 

[Cycleops]

Thanks!

So you're saying the threads are the same and therefore it is possible to replace square taper to a BBR60. Although if I decide to do that I will of course need to change the cranks.

Great, thanks for the explanation

Straight swap. You just need get the correct BB width in Hollowtech. Different for road and mountain bikes.
Assuming you have British thread, even if you don't I think they also Italian.

 

[rogerzilla]

There is a steel "mushroom" to enable use of a crank puller, TL-FC15. It used to come with an Octalink BB.