Customer wants Profile cranks on a mountain bike with a single chain wheel. What is needed for this conversion? He would like to retain the 9 speed rear cogset. Are chain guides/tensioners necessary? I've got my hands on the Profile Euro cranks/bb and I'm working on the chainwheel, but didn't want to source it until I get some ideas here of what I need. Thanks for any help.
Mtbr's 2016 Winter Biking GearReviews and Roundups
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