The tires on my wifes Cannondale T800 need to be replaced. The tires are ContiTop Touring 2000 with markings (37 - 622) 28 x 1 3/8 x 1 5/8. I understand these to be 700 x 37 tires. The tread is worn off on these tires after 3 years and about 4000 miles.
The bike is ridden almost exclusively on pavement or hard pack roads.
Can these tires be replaced with a thinner tire say 700 x 32? I am also wondering if it would be better to replace the tires with something like Bontrager which has no tread, to lessen the rolling resistance. I have bontrager on my trek 520 and they seem to have performed very well, after about 6000 miles other then nicks the tires show little wear.
Thanks in advance for your opinions.