we had good luck with the schwalbe marathon racers. they have a reflective sidewall stripe but are otherwise all black. we have a 30 on the front and a 35 on the back. they used to make a 32 i believe but don't see it on their website. the 30 is about the same size or just a little bigger than the michelin pro race 25. the michelin is the same size as the two sets of 28s that we have, continentals and avocets.