Celica Forums General Discussion Exterior another wheel and spacer question

someday in the future i plan on upgrading my wheels but am not sure if 17x8 w/45 offset and 235x17x40 will fit (or negatively affect Performance: not enough power for the wider stance). if not then should i find a thinner width rim that'll fit 215 and add Spacers? are Spacers no wider than 10mm safe or can i go wider without worrying about wheel bearing wear or even my safety? i've been looking at eibachs new aluminum Spacers ( LINK [eibach.com] )any help would be appreciated

anything with an offset between 35-45 should be fine