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Old 06-30-17 | 11:26 PM
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GTryder
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From: Prince Albert, SK - Canada

Bikes: 1993 Trek 520 Touring, 2009 Globe SF 2, 2011 Giant Dash 3, 2011 GT Traffic 3.0, 2011 GT Traffic 5.0, 2012 GT Aggressor 3.0, 2014 Surface 604 Element

Originally Posted by FBinNY
BTW- I didn't mention it earlier because I believe you;re still well within the limits, but anyone reading this needs to be aware that IGH hubs may have low gear ratio limits.

As you lower the primary gearing you increase your leverage, and therefore the maximum input torque. These are just guideline numbers because obviously rider strength varies. But heavier or stronger riders, and those riding steep hills need to be mindful of these limits, and even apply them more conservatively based on your conditions.
Good reminder - rule of thumb I remember from the 60's (Sturmey Archer days) was don't go lower than 2:1 drive ratio.
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