Mountain Biking - Rear pegs on a Giant?

Not quite a mountain biking question as much as a question about a mountain bike:
I use my Giant Boulder (formerly SE, before a swap for a rigid fork) purely for commuting around the city. Often I'll meet my girlfriend somewhere she hasn't brought her bike and I'll end up doubling her on mine. I was just wondering about the feasibility of rear pegs, so she won't have to balance precariously on the seat while her feet dangle. Is it absurd to expect the axle to deal with 280lbs. for ten or fifteen minutes at a time a few times a week?
Are there any risks (to the bike) I haven't thought of?

Thanks,
Al.

LOL. Shocks, pegs!

you'll bend the frame and the derailleur hanger, that assuming you can even find a way to put them on there. no, its not a good idea. i suggest a new girlfriend, one who isnt quite so needy. or tell the ***** to walk.

shocks.. pegs.. LUCKY!!!!

Get a bmx bike for that.

First of all, this is a rigid frame. No suspension. Where all this business about "Shocks, pegs!" is coming from, I don't know.
...
So what you're all trying to say, albeit indirectly, is that the chainstays and the axle won't be able to deal with the (mostly torsional) stress of an extra 65 pounds (130 pounds divided by two sides)? I'm going to bend the rear triangles outwards?

Either call her up and remind her to bring her bike or get a bmx'er is what I'd be thinking.

I think the axle and frame would be ok, but it might break your derrailuer hanger.

Let her ride on the handlebars!

Or let her ride and you can run along side. :D

Dosen't sound too feasable, unless you got a Ti axled super rear hub but even then you are putting weight on the frame in a bad way. The bmx bikes have a shorter axel and have stonger frames to support this stuff. The one option I may see is this frame mount pegs (http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4549702907&category=35588) but you have to check the diameter of your frame and you would probally have to have steel else it may dig into it.

Get a lighter girlfried and one of these - http://www.trail-a-bike.com/

Get a lighter girlfried and one of these - http://www.trail-a-bike.com/
I am all for this thing, they have an 7 and 8 speed version!!! I think they should have races with them. (adult riders of course)

Yeah, but they only support 85 lbs.

Put a towel on the handlebars and just double her that way.

I put pegs on my old bike one time, now the axel is half bent.

Thank you for the mostly helpful responses.

There's some people on fixies who run pegs, but then there's no derrailuer to worry about... I think the axles should be ok for a while in any case... even 3/8th axles can be grinded (ground?) a little or flatland-tricked on without too much trouble

Buy a car.

Not sure if anybody reads Mountain Bike Action, but on page 16 of the June 05 issue there is a bike for your needs. It looks kind of goofy but it's a fs bike w/ an extra long seat that "is big enough for three of your friends"

Hmm.. sounds like some other type of action, even if it happens to be on a mountain bike. ;)