Will 17 Eclipse wheels fit on a 95 Diamante with 15 stock wheels?
Yes but it will feel funny. Might wanna jack it up an inch. Actually you should be just fine
Stock tires/wheels on a 95 Diamante are 205/65-15. So, if you go with 17 rims, you will need to get 215/50-17 tires. This will keep the wheel diameter the same which in turn keeps your Speedometer accurate. Also, both the Eclsipse and the Diamante use the 5x114.3 bolt pattern, so they will fit