Threaded bottom bracket to Press in?

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07-22-19 | 08:19 AM

donhaller

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From: Chesapeake Beach, Maryland USA

Bikes: GIANT TCR C1, Gary Fisher Aquila MTB, Custom Nishiki, TREK Antelope

Threaded bottom bracket to Press in?

So, I have an older Giant carbon frame that uses a threaded 6600 BB. I also came upon a brand new Ultegra group that uses a pressed-in BB. I'm wondering if I can just swap out the press-in for a threaded unit and still use the new Ultegra 6800 crankset.

07-22-19 | 08:34 AM

dedhed

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From: Milwaukee, WI

Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400, 2013 Novara Randonee, 1990 Trek 970

Should be able to use your existing BB or at least a new 6800 threaded. Both are HTII

https://si.shimano.com/pdfs/dm/DM-FC0003-06-ENG.pdf

07-22-19 | 08:50 AM

TimothyH

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From: Northwest Georgia

Bikes: 2018 Rodriguez Custom Fixed Gear, 2017 Niner RLT 9 RDO, 2015 Bianchi Pista, 2002 Fuji Robaix

I agree with [MENTION=28167]dedhed[/MENTION].

You can use a Shimano SM-BBR60 bottom bracket. They are about $25.

https://bike.shimano.com/en-EU/produ.../SM-BBR60.html

-Tim-