Screw-together bottom brackets

[reconstyle]

Has anyone had any experience with these types of bottom brackets? I'll be putting a shimano r8000 crank into a bb386 frame and was thinking about using this:

https://wheelsmfg.com/pub/media/catalog/product/cache/e89bb62f1beab02fc31ceaf3f888f174/3/8/386evobb-shimac.600px.jpg

[tuscanyswe]

They work well imo.

[macaroon]

I use a Praxis one on a BB30 frame: it's good.

[Dave B]

yep have used a couple of them for both shimano and sram. Work fine. Grease the threads!

[cinco]

Supposedly address creaking problem with cup style bb30, etc. I've had 5 or 6 of them and never had any problem.

Get it pretty snug, I'm sure there are torque specs somewhere, but at least just don't overtighten.

[Jere]

Hi

I see a torque spec but how do you do it they sell a wrench not a socket ?
Or did I miss something?
JB




Supposedly address creaking problem with cup style bb30, etc. I've had 5 or 6 of them and never had any problem.

Get it pretty snug, I'm sure there are torque specs somewhere, but at least just don't overtighten.

[reconstyle]

Wheels MFG do make a socket:

https://wheelsmfg.com/pub/media/catalog/product/cache/e89bb62f1beab02fc31ceaf3f888f174/b/b/bbtool-48-44_3.600px.jpg

They also list the torque spec as 35-50nm which is about 25-36 ft-lb.

[dave thompson]

So does Praxis.

[R3awak3n]

I installed a praxis early this year, its great. Has been in creak free since installation

[Veloo]

Ha! So threads are the solution to pressfit problems?

[dave thompson]

Ha! So threads are the solution to pressfit problems?

Ironically, yes.

[dogrange]

I have the Wheels one in my Open frame, works well.


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[batman1425]

Have the WMF PF30 to GXP conversion and it works great. I picked the WMF one over the praxis because at the time they were still using older version with the segmented metal fingers on the threaded section that spread apart as you tighten which was giving some folks trouble. Both the WMF version and the new praxis design with the elastomer are good options and are readily serviceable.

[reconstyle]

Thanks, folks. I don't think praxis offers a Shimano to bb386EVO option, so I will go with WMF option.

[Rekalcitrant]

I have used the Wheels Manufacturing threaded PF30, and the one Rotor makes, both for CX. Neither was as problem-free as I had hoped. With the Wheels one, grit would find its way in between the bb and shell at the points where there are cutouts for the wrench to grab, and then it would start to creak. When I removed it I could see scoring on the bb where grit had worked it’s way in. The solution that eventually worked for me was to loctite the thing in place. Also, I wasn’t impressed with the bearing seals, although I did end up getting pretty good at replacing just the bearings, which at least aren’t super expensive from Wheels Manufacuring, even the ceramic ones.

[Jere]

Thanks
I will get one
JB




Wheels MFG do make a socket:

https://wheelsmfg.com/pub/media/catalog/product/cache/e89bb62f1beab02fc31ceaf3f888f174/b/b/bbtool-48-44_3.600px.jpg

They also list the torque spec as 35-50nm which is about 25-36 ft-lb.

[mktng]

installed one on my BBright bike.
best option for press fit bb's
serviceable and reliable.

[cmg]

after you screw them together can the bearings be removed while the shell stays in place?

[mktng]

after you screw them together can the bearings be removed while the shell stays in place?

minor servicing you can leave the cups in.
bearing replacement i believe you need the cups out

[earlfoss]

I highly recommend this particular bb. Had creaking issues on my C60 last season and replaced the press-in bb with one of these. Fixed the creak! I use one on my BMC SLR01 and am problem free so far this season too.

[cmbicycles]

Hi

I see a torque spec but how do you do it they sell a wrench not a socket ?
Or did I miss something?
JB

You just use the wrench to tighten it until it clicks, then back it off a 1/4 turn. ;)

[redir]

Next time my BB30 starts creaking it's coming out for good. I expect it to start in a couple months. Worst design ever!

[Vamoots58]

with this design. My latest build was a Apple Album, almost didn't go that route because I didn't want the PF BB. LBS suggested the Wheels Manufacturing BB and said 'thank me later' - great design!!

[batman1425]

after you screw them together can the bearings be removed while the shell stays in place?

I've never tried this (yet) but they sell bearing extractors and presses for removing and installing them. Presumably there should be enough clearance to get one in there with it still in the frame. The extractor is essentially an expanding collet that grabs the race and give you a flat surface to smack on with a punch to pop it out.