Crank arm length

[jakers1975]

Hey guys. I'm building a Ruff Dean and I'm wondering about crank arm length. I'm running Kenda Flame 26x30's and I have my fork arms extend to the max. I took my first test ride last night and I struck the pedals a lot. Even just pedaling in a straight line and swerving left to right was causing pedal strikes. What are ppl using for 3 piece applications? I'm told the standard bmx crank length is 175mm.

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[user 135]

I think Rat Rod used 145mm on his Dean. http://www.ratrodbikes.com/forum/index.php?threads/the-dean-10-26.70564/

Make sure you use short crank arms or your pedals will scrape. I think I used 145mm arms on The Dean.

 

[jakers1975]

Jeez. I'm way too long. 175 is the most common size though correct?


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[user 135]

Yes 175 is fairly common for 1 piece cranks. You could try some 165mm (6.5") cranks but those are only 1/3 inch shorter. 145mm would be 5.70"

http://www.niagaracycle.com/categories/components/drive-train/cranks/cranksets/cruiser-cranksets

 

[mikeeebikey]

Or, you could change the fork. Something to raise the front end a couple inches, maybe smooth the ride out? Like a Monark springer?

 

[Ldog33]

I run 5.5's on my Porucho and I scrape once in a while, but I also think the Dean is lower then the Porucho?