Polar Grit X Pro Titan
If you are serious about your training, you may want to invest in a sport watch. It has a built-in GPS, so you can see the distance of your bike ride.
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From Amazon
Polar Grit X Pro Titan - Premium Outdoor GPS Sports Watch , Sapphire Glass, Wrist-based Heart Rate Monitor, Ultra-Long Battery, Navigation - Trail Running, Mountain Biking - Black-Red
£439.99
This product is also available at 2 unverified merchants.
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