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I'm looking for a digital/computer cycle trainer which will give me variance evidence eg speed, cadence, hr etc. Looking around this looks a decent option http://www.chwhite.btinternet.co.uk/html/elite_wireless_fluid_trainer.html
Other options are a more basic one with a computer with hr and cadence http://www.evanscycles.com/products/cateye/v3-triple-computer-ec008444
only be speed missing.
Theres better ones out there but they soon start getting expensive.