Rep Power: 270

Alright, so at Tirerack it seems there are 2 diff ver of the K-1 Racing wheels of the 15X7 size. This is the first one, http://www.tirerack.com/servlet/Call...filterSpecial=, and the price is $109 each, 13.5 lbs, Wheel Offset: +38mm, Construction Type: G. Cast/Shot Peened.<--What does this mean?

Second is, http://www.tirerack.com/servlet/Call...e=&showRear=no, $129 each, 13.0 lbs, Wheel Offset: 45mm, Construction Type: Cast.
So it seems the lighter ver is $20 more each, .5lbs less, and has a construction of just Cast. It also seems they only have this in silver and not the white ver.

So the basic questions that I ask are, Why is it lighter, Which off set ver is better for AutoX 45mm or the 38mm. Thanks

 
Rep Power: 413

You can't look at those links anymore. I am assuming the first one is the Kosei K1 and the second is the Kosei K1-TS. They have different styles.

Shot peening is decorative. In fact, I think that the K1 is cast, but shot peened for looks. If you really want to pay the extra $80 for a total savings of 2lbs. feel free. I personally have the K1s and no complaints, but I haven't owned that many different sets of wheels.

I think either offset would be fine. 38 would probably be better, but Boilermaker or Zzyzx would be better.

 
Rep Power: 0

lighter is better, id go 45 offset i think tho, i have 38 right now on my rims, and they lean a little out a the top, instead of out at the bottem.