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Technical & Reference Section => Tech and Restoration => Topic started by: level on August 12, 2011, 11:59 AM

Title: usa loose ball type to seal BB
Post by: level 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
Title: Re: usa loose ball type to seal BB
Post by: pickle 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:
Title: Re: usa loose ball type to seal BB
Post by: level 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.
Title: Re: usa loose ball type to seal BB
Post by: pickle 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:
Title: Re: usa loose ball type to seal BB
Post by: pickle 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
Title: Re: usa loose ball type to seal BB
Post by: BENDYCAT ELEVENTEEN on August 12, 2011, 12:24 PM: (http://www.radbmx.co.uk/archive/albums/dd252/BENDYCAT/bmx%20stuff/SNC10586.jpg)

go for a set of sweet chrome jobs (peds not included )
Title: Re: usa loose ball type to seal BB
Post by: level 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.
Title: Re: usa loose ball type to seal BB
Post by: level on August 12, 2011, 12:45 PM: (http://level.im/wp-content/uploads/2011/08/image.jpeg)
Title: Re: usa loose ball type to seal BB
Post by: pickle 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.
Title: Re: usa loose ball type to seal BB
Post by: HEYWOOD BMX 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
Title: Re: usa loose ball type to seal BB
Post by: level on August 12, 2011, 02:04 PM: ohh balls... bike shop reckon it was a straight swop.

Thanks guys, helpful as always.