Hollowtech2 BB's

markos1963

Daft question I think. Does it matter what H2 bb i put on with my 105 crankset? ie can I fit Ultegra 6700 or DA or will iI have to use a 105 one(5600)

nicklouse

take your pick... or you send them to Betd for new (better) bearings.

markos1963

nicklouse wrote:

take your pick... or you send them to Betd for new (better) bearings.

Explain please?

hopper1

Just run what one you want Markos.
I just fitted a DA Hollowtech II with my Ultegra 6700 chainset, in my TT frame.
I would have run a 105 one, but couldn't find one, I don't consider that the DA was that expensive, either...
How did it go on Wednesday?...

nmcgann

I think I'm running an ultegra BB with my 105 crankset (or it may be a DA bb - I can't remember which one I fitted of the 2 sets I had).

The HT2 BBs are all compatible (road ones), so it doesn't matter which you use.

markos1963

hopper1 wrote:

Just run what one you want Markos.
I just fitted a DA Hollowtech II with my Ultegra 6700 chainset, in my TT frame.
I would have run a 105 one, but couldn't find one, I don't consider that the DA was that expensive, either...
How did it go on Wednesday?...

Wednesday was strangely slower than the previous week, pace was up and down and there was a lot of poor riding. Still fun though

hopper1

Are you changing the BB in the Onyx?

markos1963

Yes, it was very noisy at Lotus others kept looking down at my bike and I thought I had broken a spoke it was rattleing so much

hopper1

If that's the first BB change, I'd recommend getting the shells 'faced' to aid longevity of your next BB!
Shame you don't need an Octalink, as I just removed a brand new one to fit the HT 2!

markos1963

I doubt its the first as the bike was 2nd hand when I got it. I thought it was the frame faces that needed 'facing' when converting to HT2?

hopper1

markos1963 wrote:

I doubt its the first as the bike was 2nd hand when I got it. I thought it was the frame faces that needed 'facing' when converting to HT2?

That's what I meant... The HT 2 cups screw into the BB shells on the frame.

tonkin

Use any. There is only a tiny quality difference between the 3 if any.

markos1963

Cheers all, going to order Ultegra, always think it offers a nice balance between cost/performance