Carbon Frame and BBSHD

Get all your technical information about electric bikes here.
Post Reply
barbs00   100 W

100 W
Posts: 107
Joined: Jun 01 2017 8:18am
Location: Australia....mate! (Gold Coast)

Carbon Frame and BBSHD

Post by barbs00 » Jan 10 2018 5:16pm

Hi All,

I have the chance to get a really cheap Giant anthem advanced 2016 - Carbon frame bike.

I would like to add my BBSHD motor to this frame.

Are there any issues using a carbon frame with a BBSHD mid drive?

Cheers

User avatar
amberwolf   100 GW

100 GW
Posts: 25128
Joined: Aug 17 2009 6:43am
Location: Phoenix, AZ, USA, Earth, Sol, Local Bubble, Orion Arm, Milky Way, Local Group
Contact:

Re: Carbon Frame and BBSHD

Post by amberwolf » Jan 11 2018 2:18am

There's been some discussion of BBS* and carbon frames; in case they're useful, here's a few threads with those in the title (there's probably other individual posts or threads without that in the title that have info too)
https://endless-sphere.com/forums/searc ... mit=Search

barbs00   100 W

100 W
Posts: 107
Joined: Jun 01 2017 8:18am
Location: Australia....mate! (Gold Coast)

Re: Carbon Frame and BBSHD

Post by barbs00 » Jan 11 2018 7:22am

Thanks Amberwolf.

I went out to see the bike today and unfortunately the bottom bracket is around 90mm and the BBSHD I wanted to fit (already have it) is the standard 68-73mm version. Damn!

I am guessing the answer is no....but is there any way to make this fit without a ridiculous amount of effort? Anyone sell something that may help?

Cheers

User avatar
fechter   100 GW

100 GW
Posts: 12911
Joined: Dec 31 2006 3:23pm
Location: California Bay Area, USA

Re: Carbon Frame and BBSHD

Post by fechter » Jan 11 2018 10:46am

They make a 100mm BBSHD for fat bikes. This could work with a spacer.
"One test is worth a thousand opinions"

barbs00   100 W

100 W
Posts: 107
Joined: Jun 01 2017 8:18am
Location: Australia....mate! (Gold Coast)

Re: Carbon Frame and BBSHD

Post by barbs00 » Jan 12 2018 3:57am

Yes that might work but unfortunately I already have a standard size BBSHD motor I wanted to use.... :x

Are the small teeth/grooves of the BBSHD that bite into the bottom bracket likely to damage a carbon frame?

Someone told me it could crack the frame but the teeth seem so small that I can't see this happening? Then again I have been wrong before :D

Epyon   1 W

1 W
Posts: 54
Joined: Jun 06 2017 1:28am

Re: Carbon Frame and BBSHD

Post by Epyon » Jan 12 2018 8:52am

Any carbon frame with a threaded BB is going to have an aluminum insert, so no problem. A press-fit frame may not, but you'd have to use an adapter anyways.

SlowCo   10 kW

10 kW
Posts: 917
Joined: Jan 05 2015 5:43pm
Location: The Netherlands

Re: Carbon Frame and BBSHD

Post by SlowCo » Jan 12 2018 10:21am

Be careful as some carbon frames have a bottom bracket that is too thick in material for the BBSHD to fit. See this thread:
https://endless-sphere.com/forums/viewt ... &p=1127215

And the clearance of the BBSHD:
68mm-measurements.jpg
BBSHD clearance for BB.jpg
BBSHD clearance for BB.jpg (123.83 KiB) Viewed 1011 times

barbs00   100 W

100 W
Posts: 107
Joined: Jun 01 2017 8:18am
Location: Australia....mate! (Gold Coast)

Re: Carbon Frame and BBSHD

Post by barbs00 » Jan 13 2018 5:38am

Very helpful! Thanks.

I didn't think of that but it makes sense as Carbon BB are thicker than Alloy

Post Reply