Why don't BMX street/dirt bikes utilize some mountain bike parts?

R

Rong R

New member
For many years now, a lot of BMXers have demanded lighter bikes.
For example, a way to make BMX street/dirt bikes lighter would be to use MTB bottom brackets, cranks, aluminum seat posts. These parts are still strong but also lighter than bmx parts, especially mtb BB's and cranks.

If BMX bikes used some of these parts, it would be easier to go to a shop and get parts if more parts utilized mtb parts.

Why aren't manufacturers doing this?
 
I think bmx has a much bigger emphasis on strength, simplicity and low maintenance. some MTB parts are lighter but they are also overcomplicated and require constant maintenance and adjusting.
Also remember that the cranks have a larger span and are designed to withstand more than double the stress in BMX.
 
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