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Little BB30/ modern bike knowledge needed

Posted: Fri Jul 19, 2013 1:33 am
by bobqzzi
About to install my first set of PF 30 cranks.

The cups and bearings were installed in the frame (Cdale Super Six) when I got it, so I'm going to use them.

I bought a Specialized S-Works crank which has the Hirth joint.

Read the instructions, did some net research, but I have a question.

It appears the arms are supposed to slide into the bearings (same way an external BB Shimano crank axle slides through).

How tight a fit should I expect here? How do I get them to slide through- I don't see using a rubber hammer to whack the carbon arms. Will the bolt catch and pull them through?

More importantly, how to I remove them?
I will need to remove and install them fairly frequently as i have 2 spiders for them (one for road, one for a single ring for hillclimbs)


Bonus question: Using Campy 11sp levers with Shimano XTR rear derailleur. Neither the frame nor the rear derailleur have provision for adjustment. What are my options here?

Any experiences replies appreciated.

Re: Little BB30/ modern bike knowledge needed

Posted: Fri Jul 19, 2013 1:49 am
by bikerjulio
Bonus question: Using Campy 11sp levers with Shimano XTR rear derailleur. Neither the frame nor the rear derailleur have provision for adjustment. What are my options here?


Is this a joke of some kind?

Re: Little BB30/ modern bike knowledge needed

Posted: Fri Jul 19, 2013 2:00 am
by bobqzzi
bikerjulio wrote:
Bonus question: Using Campy 11sp levers with Shimano XTR rear derailleur. Neither the frame nor the rear derailleur have provision for adjustment. What are my options here?


Is this a joke of some kind?


No, why would it be?

Campy 11 speed lever + non dynasis shimano rear derailleur= works perfectly with Shimano 9 speed wheel/cassette. I'm using the XTR because I need a 34 tooth large cog because it is a hillclimb bike

Re: Little BB30/ modern bike knowledge needed

Posted: Fri Jul 19, 2013 2:13 am
by alorast
Put the crank arms in a freezer for a bit that way you wont have to hammer on them as much (the spindle should shrink a little).

Re: Little BB30/ modern bike knowledge needed

Posted: Fri Jul 19, 2013 6:20 am
by thisisatest
specialized cranks usually will slide or wiggle in without much fuss, but if it's tight, put it in the freezer. in the end, a plastic faced mallet is no problem either. the bolt will pull it together too.
to take it off, loosen the bolt and wiggle one arm out, then the other.
for the shifter/derailleur, personally i'd use a non-shadow type rear derailleur, as it tracks the cogs closer, shifting is better in a road application. if you stick with the derailleur you have, inline barrel adjusters are everywhere. Jagwire makes a bunch, their most recent one holds 4mm housing without end caps and is especially small and functional. Shimano makes one similar, which is even better as it is unlikely to accidentally wind down. there is also a plug-in type by Jagwire that goes into a housing stop, as long as there is clearance for the barrel itself.
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Re: Little BB30/ modern bike knowledge needed

Posted: Fri Jul 19, 2013 1:34 pm
by bobqzzi
thisisatest wrote:specialized cranks usually will slide or wiggle in without much fuss, but if it's tight, put it in the freezer. in the end, a plastic faced mallet is no problem either. the bolt will pull it together too.
to take it off, loosen the bolt and wiggle one arm out, then the other.
for the shifter/derailleur, personally i'd use a non-shadow type rear derailleur, as it tracks the cogs closer, shifting is better in a road application. if you stick with the derailleur you have, inline barrel adjusters are everywhere. Jagwire makes a bunch, their most recent one holds 4mm housing without end caps and is especially small and functional. Shimano makes one similar, which is even better as it is unlikely to accidentally wind down. there is also a plug-in type by Jagwire that goes into a housing stop, as long as there is clearance for the barrel itself.
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Thank you

Re: Little BB30/ modern bike knowledge needed

Posted: Fri Jul 19, 2013 1:48 pm
by bikerjulio
bobqzzi wrote:
bikerjulio wrote:
Bonus question: Using Campy 11sp levers with Shimano XTR rear derailleur. Neither the frame nor the rear derailleur have provision for adjustment. What are my options here?


Is this a joke of some kind?


No, why would it be?

Campy 11 speed lever + non dynasis shimano rear derailleur= works perfectly with Shimano 9 speed wheel/cassette. I'm using the XTR because I need a 34 tooth large cog because it is a hillclimb bike


My apologies. I had not thought this would work. Not sure what the question was here
Neither the frame nor the rear derailleur have provision for adjustment. What are my options here?
. What kind of adjustment?

Re: Little BB30/ modern bike knowledge needed

Posted: Fri Jul 19, 2013 3:40 pm
by ms6073
alorast wrote:Put the crank arms in a freezer for a bit that way you wont have to hammer on them as much (the spindle should shrink a little).
The spindles for our Hollowgram SRM's were way to tight such that even after and hour in the freezer, tapping them in still displaced the bearing from the other side. My solution was a trial and error process in which I used a cordless drill to spin the spindle like a lathe and using fine grade Emory cloth, I sprayed water and wet polished the spindle to reduce the diameter a few microns until the spindle could be inserted sans rubber mallet.

Re: Little BB30/ modern bike knowledge needed

Posted: Fri Jul 19, 2013 4:55 pm
by shoemakerpom2010
ms6073 wrote:
alorast wrote:Put the crank arms in a freezer for a bit that way you wont have to hammer on them as much (the spindle should shrink a little).
The spindles for our Hollowgram SRM's were way to tight such that even after and hour in the freezer, tapping them in still displaced the bearing from the other side. My solution was a trial and error process in which I used a cordless drill to spin the spindle like a lathe and using fine grade Emory cloth, I sprayed water and wet polished the spindle to reduce the diameter a few microns until the spindle could be inserted sans rubber mallet.


Can of compressed air upside down so that it gets cold fast will freeze the spindle in seconds. This way you can forgo the cloth and it will go on with the mallet just fine. :thumbup:

Re: Little BB30/ modern bike knowledge needed

Posted: Fri Jul 19, 2013 6:06 pm
by ms6073
shoemakerpom2010 wrote:Can of compressed air upside down so that it gets cold fast will freeze the spindle in seconds. This way you can forgo the cloth and it will go on with the mallet just fine. :thumbup:
I left the spindle in the freezer overnight and it still pushed the bearing out of the other side during install but after I 'polished' our spindles, a light coat of grease and they go in by hand.

Posted: Fri Jul 19, 2013 7:08 pm
by goodboyr
If you use the freezing method you still face the same problem if you ever have to remove the crank. A light sanding with 600 wet solves everything forever.

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Re: Little BB30/ modern bike knowledge needed

Posted: Sat Jul 20, 2013 4:51 am
by bobqzzi
Got it together and apart a few times. Does require a hammer,but it sets up pretty easy