I used to spend more time training and racing than just "riding"
I've seen error of my ways and the training aids are up for sale.
I have a 3,000mile only PowerTap 2.4 wireless model, alu/carbon hub. cadence, power, HR etc etc.
Used one summer and one winter training not seen proper use for a year now.
The wheel has seen little use as I race mountain bike XC so was only used a couple days a week as part of my power intervals.
Comes built into a Mavic Open Pro wheel stainless spokes,shimano FH, head unit, cradle, software, everything you get new when you pay £1000 from wiggle as I did, plus the cost of the wheel build by GB Cycles in croydon.
Local collection from london or Surrey, or buyer pays postage of their choosing.
If you want to go fast and get fit this thing will do it... put in on a turbo trainer and you've got your self a whole world of pain. Power never lies.