In the old days you could just walk into an Ikea store and buy an extra Jerker shelf along with two metal extenders, two plastic joiners in a box and a bunch of bolts. Those days are long gone, now you have to grow your Jerker the hard way.
The leg extensions came in two sizes, 13″ or 16″, I’m not sure which size went with which Jerker version as it was before I joined the “Jerker” cult. You could say I am still drinking the Kool-Aid. The 13″ extender has 9 bolt holes, while the 16″ extender has 11 bolt holes.
Since I didn’t have any plastic joining pieces I opted to heighten my Ikea Jerker by using two sets of extenders. The downside with this method is the number of bolts, 4 bolts on each side for a total of 8.
The dark extender is 16″ tall, whilst the light extender is a mere 13″ in length. I used wing nuts to ensure the six foot high shelf can hold a lot of weight.
Note that the bolts are offset by one in a diagonal fashion, this serves to strengthen the joint, but alas, comes with a doubling up of bolt holes.