I bought this pull up bar that is designed to go into studs that are 16" apart [Ultimate Body Press](http://rads.stackoverflow.com/amzn/click/B003TYJMV2 "Amazon")

![enter image description here](https://i.stack.imgur.com/8oYON.jpg)

My basement walls are only framed out so I can see all of the studs. I started to mount it and realized the studs are 18" OC. I'm trying to think of the best way to get this mounted and strong. 

My leading idea right now is to buy 2 more 2x6 studs and attach them to the inside of the existing ones. There is nothing running through the studs so it should be as simple as lining them up and screwing them together. I would do a few screws horizontally and then 2 on the top and bottom at a 45 degree angle to attach to the base and top horizontal studs. I believe the term is toeing?

Are there any downsides to this approach now or in the future. At some point we will finish the basement and cover this all up with drywall.