I have been looking to change my stem length, but found it pretty confusing with all the different lengths and angles available. The idea is to change both the turning radius from the head as well as the reach from the seat. Figuring out where the bars will end up is simple geometry, but difficult to visualize. I put together an excel spreadsheet to calculate show a graphic comparing several different options.
Mtbr's 2016 Winter Biking GearReviews and Roundups
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