- Feedback
- View
easy way to remember is to remove turn cups towards the front of the bike.(from 12 o'clock)
BB stuck - cup broken!
- Thread starter michael franks
- Start date
Re:
Turn BB cups the same way as the cranks turn when you're pedalling.
It seems counter intuitive, you'd think they would tighten in the direction of pedalling, but it's all to do with procession: https://en.wikipedia.org/wiki/Precession_(mechanical)
For the same reason, pedals have the thread opposite handed to the bottom bracket on the same side, so they always undo towards the back of the bike.
Turn BB cups the same way as the cranks turn when you're pedalling.
It seems counter intuitive, you'd think they would tighten in the direction of pedalling, but it's all to do with procession: https://en.wikipedia.org/wiki/Precession_(mechanical)
For the same reason, pedals have the thread opposite handed to the bottom bracket on the same side, so they always undo towards the back of the bike.
michael franks
Retrobike Rider
- Feedback
- View
Re:
Thanks again guys - BB now replaced with one of these:
http://www.woollyhatshop.com/shimano-de ... imano+un55
£9.99 posted
Thanks again guys - BB now replaced with one of these:
http://www.woollyhatshop.com/shimano-de ... imano+un55
£9.99 posted
