BB - Hope , ultegra or Dura Ace ?

velohutts

Thoughts on the above 3 bottom brackets ? The Hope is twice the price of Dura Ace which is only slightly more than the Ultegra.

Anyone able to give a longevity along with ease of service report on the 3 listed , will be fitting to Ultegra hollowtech cranks.

Not the most exciting purchase, but will be stripping out the rotor cranks and going with ultegra for ease of managing the di2 upgrade at some point later.

Regards VH.

ugo.santalucia

My instinct would probably say XTR

mikenetic

Ultegra should serve you fine. They last a very respectable amount of time, provided the BB surfaces on the frame are prepped correctly. Also, they are really inexpensive.

clickshots

On my bikes I use a mixture of 5600, 6700, and 9000. 5600 and 6700 seem to be basically the same, the 9000 ones I've had last a bit longer. Although the 9000's cost more so I don't know which works out as more economical :-P

FransJacques

If you're serious about riding and need to reduce friction then the Hope ceramic is noticeably freer spinning than Shimano which uses a lot of seals. I got one half price (40 quid) and felt it was worth it.

phillips1965

How about Chris king not cheap but glass smooth and serviceable.

jordan_217

You will not notice any difference (apart from the purchase price)

YIMan

Wow. Several replies and not one that says "buy British".

FransJacques

You can noticing it spinning the cranks with your hands, that's for sure. You'll not notice it with your legs, they're too heavy vis a vis the difference in resistance. When you're a struggling rider like me who wants every possible advantage within reason, then what's £40-50 extra?

If one rides 7000kms a year at an avg speed of 26 kph, that's 270 hours grinding away on a sheit BB. Excuse the Cervelo paraphrase but "Friction is always on".

Edit addition: Velohutts, if you're considering Di2 then you're not immune to giving your plastic a good seeing to from time to time. In this context, defo try an upgraded BB. There's a Spanish BB I bought on a whim in Mallorca last year for only EUR 45. They went to super-round steel ball route rather than the ceramic solution and it is uncommonly smooth. It's on my best bike (Cervelo) whereas the Hope ceramic is on my CX racer. If you give me until tomorrow, I can tell you what brand the Spanish one is.

desweller

The advantage of going ceramic is not losses but strength. The balls don't corrode if the seals are compromised.

mikenetic

YIMan wrote:

Wow. Several replies and not one that says "buy British".

I buy British when it makes sense. Ceramic bearings don't fit into that category.

FransJacques

Found it: http://prototype.pt/product/bb-bsa

How's your Portuguese? Actually, you can just contact them directly: http://prototype.pt/contact-us I'm sure they'd love to hear from someone from the UK.

velohutts

FransJacques , thanks for the recommend and link , I have sent them an e mail and will await a reply , is your cervelo English thread and di 2 ? also does it leave much room for the cabling ?

Cheers VH

dennisn

Sort of off topic a bit but will a DA9000 bottom bracket work on a DA7900 crank? For some reason I thought I read that they were different somehow(both cranks and bb's).

FransJacques

Yes it's English. Most bikes are save for my Colnagos.

Dennis, as far as I know Shimano have not diverged from the 24mm dia standard on their cranks since the into of 7800 in 2003. All cranks and BBs are completely interchangeable. I've tried a lot of combos and they've all worked.