I had 540's on my stolen bike and have 520's on my new one. From memory, half the weight seemed a bit of an exaggeration so here are the numbers from weight weenies :
Thank you all for your comments and especially to Tekk for bringing a smile to my cynical old face. After all that it turns out that you can indeed buy a body kit for the Frogs (SBR Sports and Bonthrones). It's not cheap at £35 and new cleats are also £35 but after three knee reconstructions (I had to have the left one done twice before you start Tekk!) I really get on with the float so I'm going to stick with them. I've had my current set for about 3 years and despite a 1.5-hour round trip commute 5 days a week and off-road rides most weekends, the bearings are still spinning happily, albeit with a grease injection once every couple of weeks or so. But thanks again for all your input.
It is a bit awkward, though.
