Continental Speed King Supersonic Folding Tyres Everday ?

Retro4300 Posts: 114
edited February 2010 in MTB buying advice
Looking at these tyres due to their low weight but wondering how well they hold up to road use as I use my bike for work (Around 25 miles a week).
Any expirence on milage use when used on road with weekend 20-30 off road rides ?