I'd guess the same as above ^^^^ I never tried them my self but the clarks shoes are supposed to enter a good vfm entry into the cartridge. market. On the inserts so far I tried Ultegra (OE) the rear lasted 9600miles. I then tried the Koolstops Salmons they lasted 2100 miles but their braking is superior. I then tried Black Original Swisstops the breaking is on a par with the salmons but only got around 900 miles. I'm currently using cheap BBB inserts and their braking seems to be on a par with the Ultegra, I've no idea on wear yet as they are only 400miles , but they seem better than the black swisstop that way and they are about a 1/4 of the price. I would admit I'm probably riding a bit more in harsh conditions and probably more aggressively too since I fitted the last three, based on that, I think the Koolstop were the best all rounders.