Rotor 3D+ Chainset with BB386 Bottom Barcket?

Weeman1973

I want to swap my Rotor 3D+ chainset that is on my Cervelo R3 (BBright B/B?) over onto my Kuota frame. This new frame already has a B/B fitted in the form of a 'Kuota BB386 46 x 24mm'. Do I need to make any amenments or get new bearings or will the 3d+ go staright in?

Is the 24mm the diameter of the spindle (ie Shimano Hollowtech stuff)? Isn't the 3D+ chainset spindle 30mm does anybody know?

pilot_pete

Your final statement is correct so you will need a new Rotor bottom bracket to fit. Not 100% sure, but I think this one; http://www.chainreactioncycles.com/rotor-pf46-30mm-steel-bottom-bracket/rp-prod130577?gs=1&gclid=CLmx0t3J4csCFcsW0wodYTwCkA&gclsrc=aw.ds just check with a rotor stockist.

PP

Monty Dog

The BB in the link won't fit, you need one for a 41mm dia BB shell: http://rotorbike.com/products/road/bb86_40

Weeman1973

Monty Dog wrote:

The BB in the link won't fit, you need one for a 41mm dia BB shell: http://rotorbike.com/products/road/bb86_40

Thanks for the replies guys, but think I'm going to struggle to find that Rotor BB anywhere local?

Do you think this would work - says compatible with BB386 for 30mm spindles?

http://www.vanillabikes.com/products/to ... oCjAnw_wcB

Weeman1973

UPDATE - I have removed the adapters to expose the bearings within the frame, so with this in mind, am I right in thinking I just need to get some new plastic adapters that reduce the bearing size to 30mm spindle rather than the 24mm reducers that are in now?

Photo's below:

https://goo.gl/photos/7h5CX2eQoGbFw9kd8
https://goo.gl/photos/8m3jpWdv2qfDBdDTA
https://goo.gl/photos/4ncF7WSVxPbbRmHt9

Weeman1973

Weeman1973 wrote:

UPDATE - I have removed the adapters to expose the bearings within the frame, so with this in mind, am I right in thinking I just need to get some new plastic adapters that reduce the bearing size to 30mm spindle rather than the 24mm reducers that are in now?

Photo's below:

https://goo.gl/photos/7h5CX2eQoGbFw9kd8
https://goo.gl/photos/8m3jpWdv2qfDBdDTA
https://goo.gl/photos/4ncF7WSVxPbbRmHt9

Thinking this might do the job?

http://www.ribblecycles.co.uk/fsa-bb386-30-adaptor/

napoleond

No. That's for the other way round, fitting a 386 crank onto a bb30.

MikeBrew

napoleond wrote:

No. That's for the other way round, fitting a 386 crank onto a bb30.

But surely, that's what the OP wants to do isn't it ? He wants to fit a 3d+ crankset, which has long 30mm axle (essentially a bb386), onto his Kuota. Presumably, the Kuota is a BB/PF30 frame with BB/30 bearings already fitted as it currently has step-down adapters (reducing to 24mm) fitted . If you look at the OP's posted pictures of the adapters , they are the type that simply fit into the inner race of an existing bearing - essentially they are nothing more sophisticated that simple sleeves/spacers.
These adapters need to be discarded, and spacers fitted to the 30mm 3d+ axle either side of the BB shell, to take up the extra axle length. The FSA spacers in the OP's earlier post may well do the job.
EDIT: Looking at the third of the OP's pictures, the bearing has the number 6806RS . This is indeed a BB30 bearing, so the 30mm 3d+ axle will fit straight in. As said before, spacers will be need either side of the BB shell to take up the extra axle length.
The 46mm diameter refers to the size of the frame orifice, within this is the bearing carrier then the bearing.

brettjmcc

From my Rotor Power Manual, it uses the 3d+ cranks (well it did until it went back the other week...)



If you don't have the 2.5mm 'A' spacer, then Velotech have them, unfortunately they only appear to have the Ceramic BB in stock

LeeDa

Weeman1973 wrote:

I want to swap my Rotor 3D+ chainset that is on my Cervelo R3 (BBright B/B?) over onto my Kuota frame. This new frame already has a B/B fitted in the form of a 'Kuota BB386 46 x 24mm'. Do I need to make any amenments or get new bearings or will the 3d+ go staright in?

Is the 24mm the diameter of the spindle (ie Shimano Hollowtech stuff)? Isn't the 3D+ chainset spindle 30mm does anybody know?

Give Velotech a call - they should be able to point you in the right direction straight away.

pilot_pete

Weeman1973 wrote:

Thanks for the replies guys, but think I'm going to struggle to find that Rotor BB anywhere local

Can't you buy online after contacting a Rotor dealer/ stockist for correct parts?

PP