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BMX General => BMX Chat => Topic started by: lammychop on July 27, 2011, 04:34 PM
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my boy has a mongoose mischief entry level bike its 6months old he wants to replace the opc with a 3 piece what bottom bracket do i need
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Any USA style sealed setup should fit it. Depending on the cranks axel size either 19mm or 22mm (19 is most common). :daumenhoch:
(or you can get a USA to Euro converter and get a Euro bb set, but I didn't want to complicate things. :))
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according to custom riders it has a mid bottom bracket
http://www.customriders.com/prodshow.asp?prodid=12302&cat=57&parent=1010&sid=3
basicly a mid bottom bracket is like a normal usa bb but u dont use the cups so you fit the bearings straight into the frame :daumenhoch:
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so the frame holes are all the same its just the spindals that are diferent is that right
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the bike in the link is a newer version with a 3 piece on it allready his has only got the one piece
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no the "frame hole" i.e frame's bottom bracket shell is the same size as a american bottom bracket sealed bearing without the cup, so just the bearing pushes into the frame with no cup
even the 2009 model uses a mid bottom bracket
the bike in the link has a 1 piece cranks
* Frame: Mongoose Freestyle BMX Frame
* Fork: Mongoose BMX fork
* Handlebars: 2pc BMX Design
* Front Hub: Mongoose 14mm
* Rear Hub: Mongoose Freewheel Hub 13T
* Rims: Alex 36H Front 48H Rear Rims
* Brakes: U Brake with Gyro Cable Detangler
* Tires: Mongoose designed tyres
* Pedals : Platform
* Cranks: 1pc 175mm Tubular crank
* Sprocket: 36T
* Mid Sealed Bottom Bracket
* Saddle: Mongoose shorty padded saddle
* Seat Post: Steel
* Grips: Mongoose OG Grip
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didn't know you could fit a 1 piece in a mid bb :LolLolLolLol: learn something new every day, ,, it says a tubular 1piece too which suggests its hollow? bit confusing that i think , unlikely to be hollow but, if so then its going to be lighter than a 3pc although not as strong
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Yeah, but if it currently has a opc then it's an older frame with a US BB. I had one and gave it to Jaymz for his nephew when we had a whip-round and it had a US BB on it.
You need to know what crank you intend to put on it and send a pic and we can tell you what BB to get. Send a pic of the bike to so we can be sure.
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ok bit confused it doesnt take much
this is the crank im trying to fit
could someone give me a link to a bb that will work with it
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=280714197572&ssPageName=STRK:MEWAX:IT
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opc cranks can be fitted to mid bottom brackets, best to put up a pic of the frame's bb just to be sure
jawbone cranks use a 19mm axle so u need a 19mm bottom bracket and your frame uses a mid bottom bracket according to custom riders website
so u need this 19mm bottom bracket
http://www.customriders.com/prodshow.asp?prodid=14051&cat=8&parent=1001&sid=3
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ok here the currant bb
(http://www.radbmx.co.uk/archive/albums/ee91/lammychop/crank.jpg)
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ok bit confused it doesnt take much
this is the crank im trying to fit
could someone give me a link to a bb that will work with it
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=280714197572&ssPageName=STRK:MEWAX:IT
Bargain :daumenhoch: :daumenhoch:
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that one is a us bb
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right that is a american bottom bracket, so the bike prob isnt 6 months old, maybe a couple of years
so u need this bottom bracket
http://www.winstanleysbikes.co.uk/product/21594/Profile_American_Standard_Cup__Bearing_Set
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right that is a american bottom bracket, so the bike prob isnt 6 months old, maybe a couple of years
so u need this bottom bracket
http://www.winstanleysbikes.co.uk/product/21594/Profile_American_Standard_Cup__Bearing_Set
was defo new last christmas
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so i need a 19mm american bb is that correct
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strange that custom riders and a couple other sites show that the 2009 & 2011 has a mid bottom bracket in the spec list
maybe its a mistake by mongoose, when they released the spec list and it was ment to say american bottom bracket not mid bottom bracket
oh well your all sorted now :daumenhoch: :daumenhoch:
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yes u need a 19mm american bottom bracket for those cranks :daumenhoch:
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many thanks
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right thats old Lammychop's problem sorted, always get there in the end , :LolLolLolLol: , but how do you fit a 1pc in mid bb ?
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google tells me u cant due to the bottom bracket shell being too small to feed the 1 peice crank arm through
teach me not to believe everything i read :LolLolLolLol: :LolLolLolLol:
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(http://www.radbmx.co.uk/archive/albums/v665/winnit93/saleitems022.jpg)
Just a pic here's the mid bearings and the US sized (hop up kit) cups they fit in :)
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19mm axle to US BB size in a sealed unit - here's a well kept secret for you bud at £13.99 plus £1.99 postage and it's even black to match the frame and crank :daumenhoch:
It's EXACTLY the same as a Redline Flight one but badged as Diamond Back, even down to the part numbers, so why pay over twice that price :shocked:
http://www.ebay.co.uk/itm/bmx-bike-diamondback-sealed-bearing-bottom-bracket-bmx-/280701109987?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item415b1706e3
Bought half a dozen off this guy over the last few years and he's superfast delivery and spot on :daumenhoch:
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nice one spen just bought one
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nice one spen just bought one
You're welcome bud :daumenhoch: