Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 28 Post(s)
Tagged: 1 Thread(s)
Quoted: 1153 Post(s)
Almost, if not all cranks are available in 170mm. The chainring availability is determined by the bolt circle diameter, and the number of speeds, ie 9s 10s, it's designed for.
Since 170 is so common, start with what style, road or mtb, single, double or triple, the chainring sizes wanted, and the number of speeds. That will drive you to a selection of cranks and you can make the selection.
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