DK bicycles looks like it might be taking a cue from the world of 24″ freestyle bikes and raising the bottom bracket on its new 2011 race cruiser to 13″ (that’s at least an inch higher than a typical race 24 frame).
In a recent thread on Vintage BMX, a DK rep explained the reasoning behind the shift:
Cruisers have always been built with a ratio that was based off of 26″ bikes (which is what cruisers used to be) this bottom bracket is 13″…so check this out:
The professional frame has an 11.4″ bottom bracket height, that is with a 20″ wheel (so that means UNDER the drop out there is 10″ of wheel, plus the tire, since the other 10″ of the 20″ wheel is above the dropout and irrelevant to the bb height.). This cruiser has a 13″ bb height, so that is 1.6″ higher than the 20 inch professional, but with a 24″ wheel, there is 12″ plus the tire under the bottom bracket. That’s 2 inches more than the 20″ frame, so in actuality, this bottom bracket isnt that high, since its only 1.6″ higher than a frame that has 2″ less wheel under the bottom bracket.
According to the DK guys on the forum thread, the new 24 is supposed to handle great (with a 20″ feel) and be easy to manual.
Other specs on the 2011 DK race 24 are:
- 22″ top tube
- 14.75 chain stay (slammed)
- 73.5 head angle
- 72 seat tube angle
- 7000 series aluminum
Certainly an interesting departure from your typical race cruiser geometry.
Will this be a game changer in the race community?
I’m pretty curious to see if other manufacturers follow suit.
Editor’s note: the BB height on the production model was lowered slightly to approximately 12.5″.