You can use 30x9.5x15 tyres on stock rims. check out
be carefull when ordering the rav4 rear shocks. I recently did a 40mm suspension lift and was going to use the rav4 rear shocks but ended up using kyb stock standard. the eylet on the rav4 shocks was bigger than standard.

99 Auto Sportage. Wildcat Extractors, Lukey Turbo Muffler, Warn manual hubs, K&N Air filter, Tyres 30/9.5/15, Ironman 40mm springs, KYB front struts & rear shocks, GME TX3220 UHF radio, dual battery system. Twin 10" electric fans. Next Job: Body lift