KCNC BB30 Bottom Bracket to Shimano Adaptor - Road 68mm

Customer Reviews (2)
4 / 5| Write your review
£39.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
Adaptor cups and bearings for the BB30 bottom bracket shell - to allow the use of standard non-BB30 cranks. To fit road frames width 68 mm shells, compatible with Shimano 24 mm cranks and KCNC K-Type cranks (without insert). Full stainless steel bearings.

- Weight: 122g
Product Reviews (2)
Questions & Answers (13) Q & A
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Product Reviews (2)
Overall Product Rating 4 / 5
Fragile Shims
By Neil
15 Feb 2018
3 / 5
ConsFragile shims
ProsStable, creak free bearings.
Purchased to replace a similar Rotor BB30 to 24mm adaptor hoping there would not be the same fragile plastic shim issue, unfortunately not. The plastic shims are exceedingly fragile, two shattered while fitting the crankset so it was lucky there were two spares in the box. Nowhere seems to sell replacements so next time I need to service, if either shim breaks it will be back to BB30 or another complete adaptor.
By Gary
21 Sep 2017
5 / 5
I recommend this product
ProsGreat prices great product.
Great product does exactly what it says on the tin.
Really easy to fit.
Definitely would recommend it and a lot cheaper than some other brands.
Just hope it wears well.
Questions & Answers (13)
diameter of the the BB insert
17 Sep 2021
what is the diameter of the cylinder in the the centre - my Felt F1 has a small diameter in the centre of the BB shell - (build up of carbon to stiffen BB)
Thank you for your enquiry, it is 35mm

WD 17/09/21
17 Mar 2018
Bought one of these a couple of months back and already getting a load of creaking. Is there a way to stop this?
Hi there,

It is worth removing, cleaning, regreasing and refitting. If you are using a carbon frame, it is worth checking, systematically, every single part on the bike. Things like mech hanger bolts being slightly loose can make a noise than sounds like the bottom bracket is toast!

Can this be used with a 2013 Canondale CAADX?
15 Mar 2018
I'm trying to convert my CAADX from FSA Cranks to Shimano Cranks(ultegra,105). Will this product do what I need?
Hi there,

This may fit, from experience in many Cannondales the cable routing can cause issues. We would recommend heading to your local Cannondale dealer.

is this suitable for a mtb with 68mm bottom bracket
05 Feb 2018

Unfortunately not, this bottom bracket is designed to convert BB30 bottom bracket shells for use with 68mm road chainsets.

can i use pus this bb on plastic cups
11 Jan 2018
i have pf 30 plastic cups on bb came with bike. bb diameter is 46 but with cups on it inner diameter is 42. do i have to remove the plastic cups ? or can i put the kcnc bb on plastic cups ?
Hi there,

We would need to see the bike in question to confirm this, if they are suitable reducer cups then it will fit fine. Be aware, there is a highly likelihood of a noisy bottom bracket with multiple adapters.

Does this adapt a BB30 frame for a Shimano 105 crankset?
14 Dec 2017
Hi there,

Yes this will adapt BB30 to Shimano fit.

Does it come with 'top hat' additional shims?
10 Sep 2017
Can I confirm that the bottom bracket comes with a spare set of additional 'top hat' crank shims?

You are correct, the bottom bracket does come with a spare set of the red crank shims.

What Is The Diameter Of The Centre
11 Apr 2017
Can you tell me what the diameter of the centre is?
I want to fit this to a Felt F1 FRD. The frame doesn't have a clip inside it but a slightly smaller diameter so a praxis bb doesn't fit.
Hi the diameter of the centre is 35mm
Can You Get This Adapter To Fit 73Mm Bb A Cannondale Supersix Evo
30 Jan 2017

This bottom bracket is designed for 68mm cranks only, if you definitely require a 73mm option then the MTB version of this bottom bracket will be suitable. These are SJSC part number 33010.

25 Sep 2016
Should this be installed with grease, or not necessary because of the o-rings?
How (and how well) are the bearings protected from dirt and water entry?

These bottom brackets do not need to be installed with grease, they can be fitted as they come. The bearings are protected by an additional external seal.

Can You Change The Bearings On Kcnc Bb30 Adapter
29 Jun 2016

You can indeed change the bearings in this bottom bracket adaptor. The old ones can be pressed out and the new ones just need to be pressed in.

Bb30 Frame And Hollowtech 2 Crank
02 Jun 2016
i have a bb30 frame and a shimano ultegra crank. is this what i need to use that crank along with the frame?

This would indeed be the correct bottom bracket adapter to use your Shimano cranks in your BB30 frame.

What Is The Os Diameter 42Mm Or Or46Mm ?
15 Jun 2014

This bottom bracket adapter has an outer diameter of 42mm.