I just mailed 4, 17 x 7.5 in front 2003 coupe rims.
Each box had 2 rims.
Each box weighed 47lbs.
47lbs minus 1lb box = 46lbs divided by 2 = 23 lbs for 1, 2003 coupe 17x7.5.

My guess is the 18 whould be 2-4lbs heavier.

 

Well I can get you about half way home........
The OEM Coupe rears are 51 lbs - wheel and tire. (245mm's)
The OEM Coupe fronts are 49.5 lbs - wheel and tire. (225mm's)

Now all you need is for someone to weigh either the front or rear OEM tire alone and subtract.

G/L
Colin

 

The stock 18s weigh 25 lbs each (they're both the same size). The Michelin Pilots in 225/45 size weigh 24 lbs and the 245/45 weigh 26lbs. Trust me. I spent 3 months gathering info on aftermarket rims before I settled for my 18lb BBS RGRs.

 

I had the numbers somewhere but I can't find it right now.

I swapped out my stock 18" with worn tire (18k on tires) with brand new 2005 19" rims. Basicly the brand new 19" weight around 1-2lbs heavier than the worn 18" each. My stock 19" weight around 49lbs front and 51.5lbs rear.

Here is the catch though - Those new Bridgestone tires weight a ton!!! Front tire 27lbs each, and the rear tires weight 30lbs each. (What the heck!?) Subtract A from B, you get the stock 19" forged rims weight. Front - 49-27 = 22lbs. Rear 51.5-30 = 21.5lbs. These numbers are not definitive because the rear rims are supposed to be heavier than the front. (8.5" width)

In comparison, stock 18" rims weight appx. 24-24.5lbs each.