I am trying to install a back rest (HD made- rigid ) on my 2009 Dyna Low. I have the bike raised. It was easy to take the front bolt out, however due to the length of the back bolt , it is hitting the tire (way on the top) and I can not push it in. I am thinking letting the air out of the back tire and maybe that will solve the issue. Will that work, or do I need to adjust the shock, so the tire will drop an inch or so. Any advice will be much appreciated. Titu.