I'm sure tyres have been covered over and over but can't seem to find any info on here about the above. I currently have the standard Conti Sport Contact 5's on my fr 184. I'm looking for a quieter tyre and have found the above as being only 67dB. Has anyone had these and can advise whether they're worth the extra £10 per corner over the conti's? My front tyres will require changing soon. If I was to change to Assy's, is it ok to just change the front 2 or would I have to change all 4?