Release brakes Giant OCR4 2006 I like to put 28c size tires on my Giant OCR4 2006 (which I second-hand bought recently), but these old Tektro brakes don't have this useful release switch modern brakes have. I tried loosening the fine tuning bolt marked (marked as 1 in the picture). But this doesn't open far enough for 25c+. 

Is there supposed to be an easy way of releasing the brakes in case I get a puncture? The only way I can think off is taking the brake blocks out, or loosening the table tension bolt (marked as 2 in the picture). 

Or is my best option just buying some new brakes if I want to run bigger tires?
There are two ways:
1. Deflate the tyre, put the wheel in, re-inflate. I had to do like this in the old days.
2. There are tension release devices you can put in the cable-housing. Shimano amongst others sells those for their direct-mount rear Dura-ace brakes that don't come with release levers. (item SM-CB90)
The alternative would be new brakes indeed.