GTs58
I'm the Wiz, and nobody beats me!
Just got to thinking. I have both the Mesinger tag and Schwinn Approved tag on some of my bikes and since the Schwinn Approved parts are made to Schwinn' s specifications I thought there could be a difference. Just check my 61 seat tagged Mesinger and my 58 and 62 seat tagged Schwinn Approved. All these seat springs have the same twist on both sides.