I went to another forum and posted a similar topic.

I'd like to convert my 1981 Free Spirit "Pinnacle" Road Bike's wheels from 27x1 1/4 to 700c due to the more selection of tires.

I don't know much about bikes, so you will need to walk me step-by-step through the process of changing the wheels. I was told on this forum that I would need to move the brakes down 4mm.

When selecting the wheel, I'll need to know if it's 120mm or 126mm. How can I find it out?

How can I find out if my bike is compatible with a 700c wheel, what modifications I'll need to make?

Any help is appreciated. Thanks in advance.

I can't change bikes. The max that I would get out of the Free Spirit is $150 on a really, really good day. A new bike would cost over $400 easily. So I really need to change the rims to 700c.

Like said, any help is appreciated.