what size tires should i put on a 95 prelude si to keep the speedo right. the rims are 17's

 

been covered many times before.....make sure you use the search button

195/65/14
205/60/14

195/60/15
205/55/15
225/50/15

195/55/16
205/50/16
225/45/16

205/45/17
215/40/17
225/40/17

these are all within less than 1% of stock

also you can use the numerous tire size calculators on the web, here is one.....
http://www.miata.net/garage/tirecalc.html