Anyone running a 30...
 

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[Closed] Anyone running a 30 mm crank in a PF41/BB92 frame with success?

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Posts: 108
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Refering specifically to reasonable BB life.
If so, what BB are you running?


 
Posted : 05/12/2017 11:58 am
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I'd considered it for a custom-design frame but rejected it in favour of regular BSA threaded - you're running a 30mm spindle inside a 41mm tube, meaning the whole bearing is 5.5mm thick and therefore rollers are going to be no bigger than about 3mm. To prolong life, pop the seal and repack with a decent waterproof grease e.g. marine grease. Even better, stop the BB getting sprayed with manky water - downtube guard that extends to the BB shell and another behind the seattube.


 
Posted : 05/12/2017 12:29 pm
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Ran that setup on my old Foxy Carbon. The simple answer is, don't. Absolutely useless. Creaked all the time, bearing life was awful and was constantly concerned I was damaging a very expensive frame & crankset. Avoid!


 
Posted : 05/12/2017 12:32 pm
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just looking a changing my Race Face BB92 new bike in July getting a bit rumbly now , Thinking of going Hope pf41 !! any feedback ???


 
Posted : 05/12/2017 7:47 pm
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Ibis Ripley run this setup as standard, and the original bearings lasted less than a year. I replaced that with an Enduro ceramic BB, which has been brilliant and 2 1/2 years later is still smooth and free running. Very dear replacement but has proved its worth.


 
Posted : 05/12/2017 8:00 pm
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Praxis make a nice thread-together bracket which is working well for me.


 
Posted : 05/12/2017 11:45 pm
 mboy
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Hope or Praxis

Both work well, though as you might expect, not as well as a bigger bearing would.


 
Posted : 06/12/2017 12:04 am
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Mondraker Foxy XR for me

Ran the Hope 30mm cranks with the Hope press fit bb for just over 2 yrs. Had to change about a month ago and was forced to choose a random one made by Rotor as was in France and in desperate need before a race. One of those; took the old one out, shit its disintegrated, better find one that fits ASAP! haha


 
Posted : 06/12/2017 12:23 am
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Also, never creaked for a looooong time and i didn't apply any grease on installation. New one creaks like an old mother hubbard ... and I greased it big time.


 
Posted : 06/12/2017 12:24 am
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Over the long game the Chris King BB with grease injection tool would sting me £200 but is guaranteed for 5 years. But £200 for a BB is a hard pill to swallow.


 
Posted : 06/12/2017 6:08 am
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RF Six6 on a BB92 Cube

I think it's a currently a Rotor BB in there, which has been fine. I remove the cranks every now and again and clean it all and regrease, but that's mainly so I don't wear the SixC axle.

Before that it was Hope one, which was visually identical to the Rotor, and lasted okay, but nothing special.


 
Posted : 06/12/2017 8:34 am

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