Rick Sanchez Posted February 10, 2015 Posted February 10, 2015 Hi all I have a 2012 Volcan XC29er with a Shimano crank (BB70) installed. A sleeve was installed to adapt the frame to take the Shimano crank, but I am now looking at getting a SRAM crank. On the Volcan website it says the bike takes a BB30, but then the same frame with different components takes a PF30 BB. BB30http://www.volcanbikes.com/xc29sram.html PF30http://www.volcanbikes.com/xc29xx.html Will I be able to install either on my bike, or should I install a specific one? How will I know which my frame can take? I know the crank will work both the BB30 and PF30 . Any help?
Pure Savage Posted February 10, 2015 Posted February 10, 2015 I know my Venge I went from Shimano to SRAM and it was a BB30
koukie Posted February 10, 2015 Posted February 10, 2015 Yes a BB30 crank will fit in either BB30 and PF30 frames
Mike Bike Posted February 10, 2015 Posted February 10, 2015 The 30 is the thickness of the shaft. Bb30 takes 2 bearings in the bb shell. Pf30 takes 2 plastic cups containing the bearings pressed into the frame.
Wyatt Earp Posted February 10, 2015 Posted February 10, 2015 The 30 is the thickness of the shaft. Bb30 takes 2 bearings in the bb shell. Pf30 takes 2 plastic cups containing the bearings pressed into the frame.Yip.Chuck that idea and get the Wheels MFG BB with alloy cups.
GoLefty!! Posted February 10, 2015 Posted February 10, 2015 The 30 is the thickness of the shaft. Bb30 takes 2 bearings in the bb shell. Pf30 takes 2 plastic cups containing the bearings pressed into the frame. Sorry to be a pedant but 30 is the diameter of the shaft. the wall thickness of different axles varies.
madbradd Posted February 10, 2015 Posted February 10, 2015 Sorry to be a pedant but 30 is the diameter of the shaft. the wall thickness of different axles varies.Took me about 3 goes to work out what you were saying! Yes 30mm thick shaft would be very heavy.
David Marshall Posted February 10, 2015 Posted February 10, 2015 I'm not a fan of press fit BB's. The outboard BB's were so much kinder to the frames.
rouxtjie Posted February 10, 2015 Posted February 10, 2015 I'm not a fan of press fit BB's. The outboard BB's were so much kinder to the frames. and the pocket... if a frame doesnt have BSA as an option, I won't consider it.
GoLefty!! Posted February 10, 2015 Posted February 10, 2015 and the pocket... if a frame doesnt have BSA as an option, I won't consider it. not many around these days. Press fit only helps the manufacturer and not the end user. Worst system ever devised.
rouxtjie Posted February 11, 2015 Posted February 11, 2015 not many around these days. Press fit only helps the manufacturer and not the end user. Worst system ever devised.ja, maak my pis bitter but I fear soon BSA will a forgotten tech. I just dont get the reasoning, why???? You now need special expensive tools to service it for what real benefit WeightStiffness I cant say I felt the pro's when I a pressfit bb
floatfox Posted February 11, 2015 Posted February 11, 2015 And be prepared to remove, clean and re-fit your pressfit bb if you have gone on a very wet ride. Otherwise it starts creaking..threaded bb for me thanks.
Brian Fantana Posted February 11, 2015 Posted February 11, 2015 ja, maak my pis bitter but I fear soon BSA will a forgotten tech. I just dont get the reasoning, why???? You now need special expensive tools to service it for what real benefit WeightStiffness I cant say I felt the pro's when I a pressfit bb Luckily most steel frames still come with BSA. Think this will be my next bike:
Morwa Posted February 11, 2015 Posted February 11, 2015 Hi all I have a 2012 Volcan XC29er with a Shimano crank (BB70) installed. A sleeve was installed to adapt the frame to take the Shimano crank, but I am now looking at getting a SRAM crank. On the Volcan website it says the bike takes a BB30, but then the same frame with different components takes a PF30 BB. BB30http://www.volcanbikes.com/xc29sram.html PF30http://www.volcanbikes.com/xc29xx.html Will I be able to install either on my bike, or should I install a specific one? How will I know which my frame can take? I know the crank will work both the BB30 and PF30 . Any help? I hope for your sake the "sleeve" used on the Volcan was not this one from SRAM? In the instructions below it says...."installation of the bottom bracket adapter into a carbon bottom bracket shell is permanent. The adapter cannot be removed. Removal will damage the adapter and bicycle frame." https://sram-cdn-pull-zone-gsdesign.netdna-ssl.com/cdn/farfuture/Rb8rwm8y6u6EyoQUwxeQyXEIJO4LC4SxGL2zIp5VtsI/mtime:1372788145/sites/default/files/techdocs/95-6415-003-000.pdf You do get a "cup" conversion as well.
rouxtjie Posted February 11, 2015 Posted February 11, 2015 Luckily most steel frames still come with BSA. Think this will be my next bike: That is one special frame...deffos a dream bike
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