Replacing Bottom Bracket Help

funkyjebus

Hi Guys. I recently bought new ultegra cranks (see pic) for my felt. At present i have a square tapered bb.So I know i need to uprade to a octalink (correct me if im wrong) not sure whcih version though. What do i need to look out for before i buy one online. I note there are different thread types and do certain frames take particular sizes, and what are cups, do i need them, do they come with it when you buy one? Any info or advice would be helpful and perhaps if you know where's the cheapest, I'll probably go for an ultegra bb.

Thanks in advance

zzzzzzzz

funkyjebus wrote: »

Hi Guys. I recently bought new ultegra cranks (see pic) for my felt. At present i have a square tapered bb.So I know i need to uprade to a octalink (correct me if im wrong) not sure whcih version though. What do i need to look out for before i buy one online. I note there are different thread types and do certain frames take particular sizes, and what are cups, do i need them, do they come with it when you buy one? Any info or advice would be helpful and perhaps if you know where's the cheapest, I'll probably go for an ultegra bb.

Thanks in advance

New ultegra cranks need a hollowtech II bottom bracket. The only thing you need to figure out is if your bike is english thread or italian thread.

http://www.chainreactioncycles.com/Models.aspx?ModelID=38998

penexpers

They're Hollowtech II cranks so you need a Hollowtech II BB like this

http://www.chainreactioncycles.com/Models.aspx?ModelID=38998

More than likely your bike has English Thread.

You'll need a tool as well

funkyjebus

Thanks. How would i find out what thread my bike is?

EDIT. Never mind found out from felt site. its a "FSA 68mm w/ Forged Chromoly Square Taper 110.5mm Spindle' so that english thread right.

thanks again