Originally Posted by CdCf
Haven't used a trainer myself, yet, but from what I've read, nothing but smooth tyres will work well, so you may end up having to get a second rear wheel, mount a slick tyre on it and put that on her bike every time.
However, one other option is to buy any cheap old road bike, give it a nice new rear tyre and have her use that. I assume you're too disparate in height for her to be able to use your bike - because with one trainer, only one person at a time will be able to use the trainer any way...
Actually, she's about 1 to 2 inches taller than me... not only that, but our porportions are quite different, she's mostly legs. We could probably make some adjustments to mine and get her to fit, but I''m very hesitant to do that.
I hadn't considered the rear whell problem though. I've wanted to get her a set of slicks for her mountain bike anyways, as she doesn't ride much, and when she does it's usually on a paved trail with me.