Bicycle Mechanics - Shorter cranks
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08-17-11, 02:03 AM
Hi, I will get this bike for my son (http://www.cube.eu/en/kid/kid-260/team-kid-260-teamline/) . It features this bottom bracket (http://cycle.shimano-eu.com/media/techdocs/content/cycle/SI/Alivio-Acera/SI_0094A/SI-0094A-001-ENG_v1_m56577569830667768.PDF). Its cranks are too long and I would like to swap them for a 130-140 mm ones. Any solution? Should I change the bottom bracket?
Cannot solve this easily.
You can get something like these (http://www.amazon.com/Ride2-Crank-Shorteners-43mm-wide/dp/B002N2KJ7W), or you can contact this guy (http://bikesmithdesign.com/Short_Cranks/shorten.html).
If you switch to a nice square-taper BB, you can then find lots of cranks in shorter sizes. eBay has tons of them. That's what I did for my kids road bike.
08-17-11, 12:15 PM
+1 .. square taper, then you can even get a longer crank arm
re-machined with new threaded holes , put in the arms further in.
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