As per usual I have to add my 2 cents to this.....
My personal belief is that, in advertising, any goes. Aslong as you abide by censorship laws then anything should be allowed. Let's face up to facts; IMAGE is EVERYTHING. If you want to push your product then you have to think about your key consumer group. In this case it's young to middle aged men (12-35), basically any male in that age group, generally, is going to love seeing pictures of sexy women, especially posing with bike products. It's association "wow she is rubbing those forks, she must ride..WOW that's sexy" something along those lines. Your consumer likes girls, he likes bikes, so you give him just that. As people have said already SEX SELLS. Their ad campaign could ahve been directed a number of ways, but they don't want to cut their market up. If they had a picture of a guy doing a huge drop with a big highlight on some forks, or whatever, I'm sure plenty of people would like it, and want the forks. BUT straight away I would see it and think "hucker forks, I don't want that...I need a race fork". The whole hucker/freerider thing is huge and they could sell a lot of forks if they directed their marketing that direction, but then they risk losing respect as a race product, likewise if they just show pictures of people racing on the fork, all the huckers will think "RaCinG iz SO B0r1ng, I huck t0 fl4t, 1 n33d huxxer forks yo" or something like that. As I said association, they will see the image and get the wrong idea. Using a generic babe posing with the fork is great, you could have the crappiest forks and pose them with hot chicks everywhere and they would probably sell because everyones just loves the add's (not quite, but in theory anyway).
Anyway, I couldn't give a rats ass about feminists or any of that (suprise suprise), I personally think the whole sexism thing is a joke. This thread isn't about that really so anyway.......that's my POV.
Edit: I realise the topic is a bit past what I wrote, but I felt the need to post anyway.