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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  usa loose ball type to seal BB
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Author Topic: usa loose ball type to seal BB  (Read 2783 times)

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usa loose ball type to seal BB
« on: August 12, 2011, 11:59 AM »
hey guys, I'm thinking of swopping out my bottom bracket on my 96 DB venom pro for a sealed version. cranks are 8 spline.

Can i just buy a US size sealed BB, and fit it with my original cranks? or is it more complicated?

Cheers,

J

Offline pickle

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Re: usa loose ball type to seal BB
« Reply #1 on: August 12, 2011, 12:03 PM »
i'm thinking you might need to change the cranks as well as the axle will probably have a thread on it for the locking nuts?

if so then have a look at the Radshop as i'm sure Stodgy does a crank with sealed BB for about £50 all in  :daumenhoch:

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Re: usa loose ball type to seal BB
« Reply #2 on: August 12, 2011, 12:15 PM »
yeah, spindle is 19 mm.

Just trying to get the heap running smooth for the London to Brighton.

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Re: usa loose ball type to seal BB
« Reply #3 on: August 12, 2011, 12:16 PM »
have a look on the bmxcity ebay page, they have BB's on there for about £10  :daumenhoch:

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Re: usa loose ball type to seal BB
« Reply #4 on: August 12, 2011, 12:21 PM »
get a set of these in black for £45 all you'd need is a set of cups which people on here will have  :daumenhoch:

http://www.radbmxshop.co.uk/shop/article_511.001/BLANK---Cromo-3-Piece-Crank-Set-_-Mid-BB---SALE.html'shop_param=cid%3D16%26aid%3D511.001%26

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Re: usa loose ball type to seal BB
« Reply #5 on: August 12, 2011, 12:24 PM »


go for a set of sweet chrome jobs (peds not included )
The Devil is away on business, I'm having to step in for him - How can I make your day Hell !!!

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Re: usa loose ball type to seal BB
« Reply #6 on: August 12, 2011, 12:37 PM »
thanks guys,

I dont have the pinch bolt on the bottom, the arms are held on buy an allen key bolt, that screws into the spindle.

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Re: usa loose ball type to seal BB
« Reply #7 on: August 12, 2011, 12:45 PM »

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Re: usa loose ball type to seal BB
« Reply #8 on: August 12, 2011, 01:31 PM »
yep, i'm afraid you'll need a new crank as well then as your axle won't allow sealed bearings over the threaded collers.


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Re: usa loose ball type to seal BB
« Reply #9 on: August 12, 2011, 01:47 PM »
 :) Strip it down and get the Vernier calipers out.I have a crankset here which is looseball USA size the(where the arms/chainring fits) but the parts where the bearing sits is the same diameter/thread pitch as a regular one-piece crank.Got one of these to fit with no probs.New crankset will prob be cheaper :daumenhoch:
http://www.evanscycles.com/products/dna/sealed-bottom-bracket-for-1-piece-cranks-ec007730

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Re: usa loose ball type to seal BB
« Reply #10 on: August 12, 2011, 02:04 PM »
ohh balls... bike shop reckon it was a straight swop.

Thanks guys, helpful as always.


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