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Whats the largest chainring you can run on a bmx?

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oldschoolace:
Ok so lets say i have just applied to Guiness to achieve a land speed record on a bmx  ;)

Assuming i went with the principle of this guy with a big fookoff chainring:

Not a valid vimeo URL
Keeping it oldschool whats the largest chainring you could run on an unaltered bmx frame, and any idea which frame would give the most clearance? :D

nosepickben:
Would 48-9 not be enough for starters, or are we talking laughably huge gearing here?

oldschoolace:
Would be nice to get 65 plus. The lad in the video is running a 104  :shocked:

nosepickben:
104...  :LolLolLolLol:

Dark Diggler:
Watch the 1st episode of speed with Guy Martin,  3 cogs is the way forward for monster gearing. :daumenhoch:

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