I have purchased a second hand cannondale super six evo frame, and have a few questions.
Firstly the bottom bracket assembly, there are no aluminum cups or sleeve for the bb, just a ridge around the id of the carbon frame.
the id is46mm and shell width is 68mm. does this mean the bb goes straight against the carbon or should there be a sleeve.
From my research i thought it was pf30. I think i would like to run hollow tech cranks, or would praxis cranks make it easier
I noticed the praxis works bb converter has a plastic sleeve, would this glue to the carbon shell, .
Secondly i have an easton sl carbon fork of 1 1/8 straight steerer, is it feasable the use a reducer race to bring down the 1.5 head tube down to 1 1/8, I have one of these on a MTB and it seems ok.
thanks.
dave
bottom bracket help
-
- Posts: 316
- Joined: Sat Mar 12, 2016 8:27 pm
- Duck!
- Expert
- Posts: 9875
- Joined: Tue May 21, 2013 8:21 pm
- Location: On The Tools
Re: bottom bracket help
Postby Duck! » Wed May 30, 2018 10:01 pm
68x46 is PF30. There doesn't have to be an aluminium liner sleeve, because like BB86 press-fit, the bearings are housed in plastic cups which are pressed into the frame. This distinguishes it from standard BB30, which has the bearings direct-fit into the frame.
Praxis Works do produce a bottom bracket adaptor to allow fitting a Shimano-type crank into a BB30 shell, but I am not sure if it is compatible with the larger bore PF30 shell. If it isn't, there are other spacer kit options which fit into the standard PF30 bottom bracket installation to enable shimano-type cranks to be fitted.
Praxis Works do produce a bottom bracket adaptor to allow fitting a Shimano-type crank into a BB30 shell, but I am not sure if it is compatible with the larger bore PF30 shell. If it isn't, there are other spacer kit options which fit into the standard PF30 bottom bracket installation to enable shimano-type cranks to be fitted.
I had a thought, but it got run over as it crossed my mind.
-
- Posts: 1545
- Joined: Wed Sep 26, 2012 11:05 pm
- Location: West Gippy
Re: bottom bracket help
Postby macca33 » Thu May 31, 2018 8:54 am
Yep, as Duck mentions - it is PF30.
Praxis works does an adapter which will press-in to the BB shell and provide for 24mm bore to suit Shimano cranksets.
Also, Wheels Mfg do a cheaper option - a pair of Delrin spacers which press into the 30mm PF30 BB and the adapters have a 24mm bore to suit Shimano cranksets.
Plenty of options are available. No need to 'glue' anything in.
cheers
Praxis works does an adapter which will press-in to the BB shell and provide for 24mm bore to suit Shimano cranksets.
Also, Wheels Mfg do a cheaper option - a pair of Delrin spacers which press into the 30mm PF30 BB and the adapters have a 24mm bore to suit Shimano cranksets.
Plenty of options are available. No need to 'glue' anything in.
cheers
CAAD10 Berzerker & Focus Mares & Ridley Noah SL
-
- Posts: 316
- Joined: Sat Mar 12, 2016 8:27 pm
- Bentnose
- Posts: 1327
- Joined: Sun Jan 03, 2010 9:00 am
- Location: N/E suburbs Melbourne, Victoria
Re: bottom bracket help
Postby Bentnose » Sun Jun 17, 2018 6:38 pm
I have one of these for my PF30 frame.
https://www.bikebug.com/wheels-mfg-pf30 ... 37914.html
https://www.bikebug.com/wheels-mfg-pf30 ... 37914.html
No signature
Jump to
- General Australian Cycling Topics
- Info / announcements
- Buying a bike / parts
- General Cycling Discussion
- The Bike Shed
- Cycling Health
- Cycling Safety and Advocacy
- Women's Cycling
- Bike & Gear Reviews
- Cycling Trade
- Stolen Bikes
- Bicycle FAQs
- The Market Place
- Member to Member Bike and Gear Sales
- Want to Buy, Group Buy, Swap
- My Bikes or Gear Elsewhere
- Serious Biking
- Audax / Randonneuring
- Retro biking
- Commuting
- MTB
- Recumbents
- Fixed Gear/ Single Speed
- Track
- Electric Bicycles
- Cyclocross and Gravel Grinding
- Dragsters / Lowriders / Cruisers
- Children's Bikes
- Cargo Bikes and Utility Cycling
- Road Racing
- Road Biking
- Training
- Time Trial
- Triathlon
- International and National Tours and Events
- Cycle Touring
- Touring Australia
- Touring Overseas
- Touring Bikes and Equipment
- Australia
- Western Australia
- New South Wales
- Queensland
- South Australia
- Victoria
- ACT
- Tasmania
- Northern Territory
- Country & Regional
Who is online
Users browsing this forum: bychosis, MattyK, The Great Boffo
- All times are UTC+10:00
- Top
- Delete cookies
About the Australian Cycling Forums
The Australian Cycling Forums is a welcoming community where you can ask questions and talk about the type of bikes and cycling topics you like.
Bicycles Network Australia
Forum Information
Connect with BNA
Brought to you by Bicycles Network Australia | © 1999 - 2024 | Powered by phpBB ®
This website uses affiliate links to retail platforms including ebay, amazon, proviz and ribble.
This website uses affiliate links to retail platforms including ebay, amazon, proviz and ribble.