Facing Frame before fitting new BB

Relaxitscool
Relaxitscool Posts: 103
edited July 2009 in MTB workshop & tech
I currently run a Powerspline, but having got through my second in 1500miles I've now decided to upgrade to an external BB. The item in question is a Firex with GXP BB. It'll be fitted to a BeOne Nirvana frame that is about 300 miles old.

The manual says for best results face the frame. I could guess what this is, but can anybody give me the definitive answer and is it really necessary on such a new frame.

Many thanks for any replies.

Rob

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