Osymetric chain rings

I was reading about Osymetric chain rings today. I thought I would find out if many of you use them and spread a bit of knowledge if you have never heard of them.

Wiggo, Froome and others all use these. Apparently they allow you to produce less lactate. They are basically a cam which give you a higher gear when you can use your big muscles to most effect i.e. 1 o'clock to 5 o'clock and a lower gear when you can't use these big muscles.

This provides more info including a paragraph on tri/duathlon benefits:

http://www.trainsharpcyclecoaching.co.uk/pdfs/osymetric-faqs.pdf

Dub

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