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Technical & Reference Section => Tech and Restoration => Topic started by: lk_97 on November 28, 2009, 09:13 AM

Title: 2 questions about my new school bike..
Post by: lk_97 on November 28, 2009, 09:13 AM

1. my bike has a us bb so if i kept the us bb in and took a crank from a bike that had a mid bb would the crank fit through the us bb?
2. My bike also has brake lugs, what brake do i need to fit them?
Thanks. :daumenhoch:

Title: Re: 2 questions about my new school bike..
Post by: Dark Diggler on November 28, 2009, 09:19 AM

What frame is it ? and what cranks are they (to help id the spindle size as there are 3 sizes)
 :daumenhoch:

Title: Re: 2 questions about my new school bike..
Post by: lk_97 on November 28, 2009, 10:03 AM

Its a diamondback 3 peice crank and a fit logic with a profile bb
Thanks :daumenhoch:

Title: Re: 2 questions about my new school bike..
Post by: Gary72 on November 28, 2009, 10:16 AM

All a MID BB is, Is an Americam BB without the cups. So just swap the whole MID BB crank into the US cups

Title: Re: 2 questions about my new school bike..
Post by: HEYWOOD BMX on November 28, 2009, 10:18 AM

 You`ll need a u-brake,loads available from any decent BMX shop.You`ll need to know the spindle size,ie a 19mm spindle will need a 19mm bottom bracket.Some Diamondback cranks have a 20mm spindle.Can you get the bearings with the DB crank and see if they fit into the cups one Profile bottom bracket?

Title: Re: 2 questions about my new school bike..
Post by: lk_97 on November 28, 2009, 06:46 PM

ohh thanks for that, ill try tomoro. i think i have a u brake aswell