Bicycle Mechanics - over-sized tires on a skinny rim

My winter bike: I have some generic track wheels from a KHS flite100. The rims are weinmann sp 17. I don't know the exact width size (but they don't look wide). Anyways, I put 700ccx35mm tires (both vittorias and panaracers) on them. They seem to fit fine and ride good. It feels better than the smaller ones I had before. My question: whats the danger in going too big of a tire for the wheel? Will they pop off if I hit a curb too hard or something? I'd like to stay as big and wide as I can. My goal is to have an indestructable ride that goes anywhere. I just want to know if these tires are too big and something could happen. BTW here's how they look:

http://farm4.static.flickr.com/3117/3155010380_f577122b5b.jpg?v=0

I'm betting it's fine with a 35C on them. You could measure the rim across from underneath with a caliper and post the result. But if they are not tiny racing rims, you should be fine.

EDIT: Here is a link to a production bike with exactly what you have there - with 35C tires as standard equipment:

http://www.khsbicycles.com/06_urban_xcel_07.htm

Your rims have an interior width of 17mm which is wide enough for 35mm tires.

http://www.weinmann-rims.com/FENYE/0SP17.htm

Just don't try a pair of Big Apples next. It's only when you really exceed recommended tire width that you start having troubles.

You'll be OK with 35C tires on a rim with a 17mm interior width.

Sheldon's chart - Tire size vs. Rim Width (http://sheldonbrown.com/tire-sizing.html#width).

Sweet saddle...what is it?
2Fer

Sweet saddle...what is it?
2Fer

It looks identical to the Selle San Marco Regal that I have.

cool thanks for the help guys. its ok then. and yes, its a selle san marco regal saddle.