Re: {BL} Digest for bicyclelifestyle@googlegroups.com - 1 update in 1 topic

[clayton bailey]

From what I understand, larger rings and cogs, bend the chain links slightly less, reducing friction, and increasing efficiency.  Pretty minuscule advantage, but it’s technically there. 

As far as the ‘other blog’, I read the 2 to1 ratio as a set up for a single speed touring bike?  

The Rohlhoff is a well sorted hub.  It’s been used for heavily laden, off road expedition touring around the world.  I think it should easily handle any increased torque by lowering your gearing on a recumbent.  

That’s the extent of my knowledge about the Rohlhoff.  

I get it.  Lower gearing rules.  My knees are done.  I have to keep my cadence high, to not cry.  

Spin to win!  

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On Friday, November 10, 2023, 4:48 PM, bicyclel...@googlegroups.com wrote:

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• Achieving low gearing with Rohloff Speedhub - 1 Update

Achieving low gearing with Rohloff Speedhub

Mark Bromley <directi...@gmail.com>: Nov 09 04:39PM -0800 Hi,   I'm new to the group and just ordered a bike with a Rohloff Speedhub. I'm a long time tourer and Rivendell owner (built up beautifully many years ago by Peter White Cycles) But with old age fast approaching I've ordered a new HP Velotechnik Streetmachine recumbent with Rohloff and would like to adapt the stock 46 chainring and 16 tooth cog to achieve lower gearing   I'm after a low gear gear inch number close to 15 or 16. One supplier recommended keeping the chainring at the stock 46 and switching out the cog at the hub for a 21 ( yields a low gear inch of 15.5)   A touring blog mentioned that they had switched to a 39 chainring and 18 or 19 cog . I was thinking of a 38 chainring and a 19 cog which yields a very low gear inch number of 14.2.   A similar blog, If I understand it correctly, - said you should look for a 2:1 relationship for chainring to cog for touring to produce a suitable low gear.   The 46/21 combo option was noted as perhaps a little more "efficient" but I'm not sure why - so that is one question.   Thoughts?   What is Rohloff's limit ? Do either of these combo's exceed the Manf. limit? If its a toque issue i would think I'd have trouble introducing Max torque in a recumbent position.   I sure would appreciate any advice the group can offer.

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[Mark Bromley]

Thanks Clayton!

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