do i have to replace all four tires? had a flat...

[circmand]

your logic is lame.

Not offended just trying to do Steve Martin in text.

But arguement holds water even recomended on the Michelin web site complete with a 21/2 minute video. But hey what does Michelin know about tires? Am I right?

Where do I install new tires if I only buy two?
If you’re replacing only two tires, be sure to have the new tires installed on your vehicle’s rear axle. Here’s why:

•New tires will provide better wet grip than your half-worn tires.
•When new tires are installed on the rear, it helps reduce the potential for your vehicle to fishtail or hydroplane in wet conditions.
Mounting Two Tires (2 1/2-minute video)