Hi everyone, This is probably quite obvious (and a bit long winded) to most of you but perhaps not to some of the newbies out there so I though I would share my recent experiences so that it can potentially help them. Recently pumped my tyres up at home with a trusty bicycle floor pump which I've had for years. Works a treat and has a built in gauge so it is easy to see when you have reached your desired pressure, which was a good thing since both front and rear tyres were at least 10 psi low! Riding to the shops shortly after this I was coming up to a fairly busy roundabout when the car to my right which did have it's left indicator on decided to turn right anyway (because cage), I was going very slow but a healthy pump of the rear brake pedal locked the rear wheel and it started skidding. Fortunately no fall and I wasn't in any danger IMO since I was watching the car like a hawk and was ready to pounce but what did catch me by surprise was the locked rear wheel. I have stood on the rear brake many times at higher speeds without a hint of locking ever so I was surprised by this but chalked it up to the white lines of the zebra crossing I had just passed as the cause. No more issues on the way home but I was more careful with the rear brake. The next day riding to work the rear of the bike just felt weird, like the bearings were shot or something else was loose. On the way home was kind of scary, locked the rear wheel again coming out of the carpark at work (again only going very slow) and on the way back I had very little confidence to lean the bike over since it felt like it might let go and slide out any second. When I got home I decided I was going to check the whole rear end, check all the bolts, bearings, tyres and chain to see if anything was loose. First obvious thing I could do was check that the tyres weren't flat as that seemed the most obvious thing. Neither tyre was going flat but I thought I should just sanity check my pressures since that was the only thing I had touched recently. I connected my trusty bicycle pump which has the only pressure gauge I currently have and both tyres were right were I left them a couple of days before. All seemed well but something just didn't seem right. I happened to be staying at the folks place that night and my Dad happened to have three of those cheap pencil type pressure gauges. I tried each of them and all three showed within a couple of psi of each other of which the average was about 50 psi! Wholly cr*p the sticker on the side of the swing arm says to have a max of 33/36 psi front/rear! I bled some of the air out to get them down to what they should be. I then reconnected my trusty bicycle pump which showed pressures around 12-15 psi lower than what was really in there. I then threw the pump out the window into the bin. Once the pressures were back to normal the bike rides like it always has so happy days and I have ordered a proper pressure gauge. Moral of the story is get yourself a decent pressure gauge and a backup! I hope this help someone else!