would my car hav better 1/4 m. times with my chrome 17s w/205-40s or with 15 in. steel wheels

smaller wheels weight will help too

thanx man - ill try the 15s friday night at the track

but steel weights more than aluminum wheels.

Depends on the complexity of the rims... my aluminum ones weight a tad bit more than my steels.. 15's to 17's... o well IDk.. they look fockin sweet!

yea true but it would look cooler with chrome going down the track lol just in my personaly option. plus its only a couple pounds difference..not gonna be a bit difference in times.

very true i have 18" and they weight about 24lbs each and my 16" that come with car weight about 30lbs so not much different but i still run better times with 16s

remember tires help too... the better grip the faster you will be