After fixing the sticky rear caliper / rear brake cable I decided to head out for a quick ride just to check everything was working correctly. Was going quite well, until I got on to the road at the back of Balmirmer (near Muirdrum). Riding along quite nicely and the road suddenly turns to a muddy stoney mess from farmers tractor as it leads off a field. Catch the edge of one sizeable stone and bang! instant flat tyre. Never a good thing. On checking I noticed that it was a one inch tear in the side wall. Bugger! Improvised a tyre boot using one of these foil backed double puncture patches ... I pedalled standing up (to reduce rear wheel load) all the way home (11 miles!) ... legs completely buggered, but glad I made it. Was really worried for a minute or two. Farmers do a grand job, but they`re a bloody nuisance when they spread their fields all over the roads ... grrrr.