Any ideas what Shimano BB to replace Praxis conversion bottom bracket on my Fuji

russboy

So just picked up my new bike & want to put an Ultegra crankset straight on there but what BB do I need to make it fit?

Full spec of the bike is here:

https://www.evanscycles.com/fuji-transo ... e-EV241883

Oh and I presume this is the correct crankset:

http://www.wiggle.co.uk/shimano-ultegra ... -chainset/

Cheers,

Russ

andy9964

The frame is a BB30 frame. Praxis do a BB30 to Hollowtech kit which will work with the Ultegra crank, you might get lucky and find the Praxis BB already fitted, works with the Ultegra crank.
Might be worth trawling through this forum for more info on the crank already fitted
http://forums.roadbikereview.com/fuji/

russboy

So may just be worth ordering it, minus a new BB, & trying it out you reckon?

Russ

andy9964

Can't see the harm in it, Wiggle will take returns if you decide to stick with the original crank. You could always ask Evans what the spec is for the BB already fitted.
There are cheaper kits similar to Praxis, but can't remember what they're called

russboy

Hmmm, thinking about it I have a 105 crankset on my old Fuji that I put on 6 months ago, might just try that on the new Fuji using the existing BB to see if it works. I presume the 105 & Ultegra cranks are probably the same spec?

darkhairedlord

What's wrong with the oval 720 crankset?

russboy

darkhairedlord wrote:

What's wrong with the oval 720 crankset?

Function wise? Prob nothing.

It just looks a little agricultural, I prefer the smoother lines of the Ultegra, plus then the bike has a full Ultegra set up.

russboy

Andy9964 wrote:

The frame is a BB30 frame. Praxis do a BB30 to Hollowtech kit which will work with the Ultegra crank, you might get lucky and find the Praxis BB already fitted, works with the Ultegra crank.
Might be worth trawling through this forum for more info on the crank already fitted
http://forums.roadbikereview.com/fuji/

No joy on the existing BB as it BB has a 24mm spindle on the drive side but reduces to 22mm on the none drive side. Just taken both bikes apart to have a look.

Removed the BB to get the details if it:



So basically I need exactly the same but not reducing to 22mm on the non drive side.

As you'd expect the width of the frame at the BB is 68mm, as here:



With the opening at 42mm as here:

russboy

Looks like this would do the trick:

http://www.sjscycles.co.uk/kcnc-bb30-bo ... prod33009/