Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 10-19-10, 11:34 AM   #1
sprocket47
Member
Thread Starter
 
Join Date: Jan 2010
Bikes:
Posts: 48
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
BB sizing help!

I ride a 29er single speed mtn bike and I'm looking to upgrade the crank and BB. It was recommended to get the BMX Redline Flight crank and BB (I'm a big aggressive rider). I'm doing some price shopping and I'm not sure how to determine what Rebline Flight BB to get. My bike has a 68x118 but when shopping for the Redline BB it says the size is American 19mm spindle? Will that work? What do I need to know to get the correct size? Thanks!
sprocket47 is offline   Reply With Quote
Old 10-19-10, 11:43 AM   #2
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 20,358
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 633 Post(s)
they may mean the diameter of the axle,, metric system has been resisted in America , so as to be a rather oxymoron.

the 118 is width of the BB axle , but may no longer apply..
now the new external bb cranks have the spindle as part of the right crankarm.

Seattle bike supply is the Importer of Red line stuff , ask your Dealer for details..
fietsbob is offline   Reply With Quote
Old 10-19-10, 01:16 PM   #3
Airburst
Senior Member
 
Join Date: Oct 2009
Location: England, currently dividing my time between university in Guildford and home just outside Reading
Bikes: Too many to list here!
Posts: 1,921
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
19 mm refers to the diameter of the spindle. For BMX, they come in 19 and 22 mm versions. The BB bearings are specific to the axle size, but they all fit the same frames. All the modern BMX bikes round here seem to use the press-fit "mid" BB bearings. Threaded bottom brackets are referred to as "euro" BBs in BMX, so that's probably what you're after if you're fitting them to an MTB.
Airburst is offline   Reply With Quote
Old 10-19-10, 01:42 PM   #4
FunkyStickman
On a Mission from God
 
FunkyStickman's Avatar
 
Join Date: Oct 2009
Location: Thibodaux, LA
Bikes: '10 Surly LHT, Rat-rod Klunker, '82 Peugeot PH12 (WIP)
Posts: 2,009
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
You don't want "American" bottom brackets, make sure it's a Euro, and as Airburst said, 19mm is the spindle, so make sure the crankset's spindle size is the same as the bottom bracket's.
FunkyStickman is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 05:08 AM.