A 15 with 3.75 bs, as stated, would be needed to clear the Calp's, but the main problem would be excessive wheel bearing wear with that wide of an offset and rim width. Way way too much outside bearing load, 6.25". I would suggest if you really want a 10 wide rim you find one that is 16 or larger to clear the Calp's and has a 4.5 - 5" bs. I'm running a 2013 JKR with 18x9 -5.0" bs., so I'm only at 4" on the outside loading of the wheel bearing. This setup with 12.5 wides put the tire about 1.5" outside the stock fender flares.
Another problem with going much over 5" on the outside will be the excessive wheel steer/bump steer even with a steering stabilizer.
Just my 2c's thou!!