Depends on the store and the person serving you. I've had them accept a coupon code, and also had them tell me I couldn't use it unless I had the physical coupon. You can always try...
Since the coupon codes usually have a $75 minimum, usually it's still cheaper to use the coupon code online ($15 discount minimum) and pay the shipping (around $10) than it is to buy it in the store without the coupon.
Well, I'm looking at a cheapo bike for my wife to scoot around on. Paved trails and such, maybe a gravel path or 2. Anyway, we were in there today and they had one of these K2 Title 9 ladies mountain bikes, normally $349 on clearance for $200. Not a bad deal for what it is. I figured if I could use a coupon or a code we could get an even better deal. I priced it on their website with the code and it was more than $200 with shipping, so I figured I'd give it a shot in store. I'll look at my coupons when I get home tonight. Thanks!
$200 sounds like a good deal. Are you a team performance member? $20 per year, 10% back on purchases in the form of points, redeemable on future purchases, plus free shipping upgrades. Spend $200 and it's essentially paid for itself, so if you think you'll be buying other stuff at Performance over the course of the next 12 months it might be worth considering.
Further to my previous post, some coupon codes do have restrictions on where they can be used. I received a 15% off code via email the other day, but it specifically states that it's only valid online and over the phone, and cannot be used in store.