Help me please...

"A dream is a wish your heart makes."
Cinderella

little longer then 30 but u can always find a good quote.

Shut up legs! is always a good option

Also I'd look into getting a custom engraved stem cap, www.purelycustom.com does an awesome job. The stem cap I got my wife's tri bike reads; "I'm not a trophy wife, I'm a podium girl..."

...and mine reads: "All Ahead Flank!" (maritime helm order for maximum engine speed)

It's not Disney, princess, pink, or kids, byt I do like this idea from above:

Carbon > Diamonds

I am just browsing some quotes from Disney (a quick web search brought me to some page) and I like this from Mulan:

"Let's go kick some hunny buns! -Mushu"

Should fit in the 30 character range if you don't include the credit.  I think that would be really cute for a bike.

a winner never quits, and a quitter never wins.

that might be more than 30

^^^ Like.

I like it. It's also delightfully un-American

1. Bikes are a girls best friend.
2. My prince bought me this steed.
3. Princess Power
4. Pixie Dust & HTFU powder

Is the bike a surprise?  Will she have input into the saying you have applied to the bike (you suprise her with the bike, then the order is placed with whatever verbiage she wants) or are you looking for input to decide something for her?

Not trying to be Debbie Downer but if you pick it for her and it's not exactly thrilling to her, she'll have to look at it each and every time she rides..

Just saying...

As for a quote:  The time to work is now

I must be abnormal....

"Greed, for lack of a better word, is good."