I rock these bikes.

I really, really, really really like these bikes.

Where is the context?
.
It's slang. I think it means that I really like them.

The link to the context is now enabled.
And I'm afraid it doesn't quite fit the suggested meaning of "I really like these bikes" in context. Could you please take a look at the link and let me know what you think?

Apparently
I'm good at riding this kind of bike..
I'm good at doing tricks with this kind of bike.

Such slang can change its meaning quickly.

Clive

Thanks.
Can I say instead "I rock at these bikes" to mean the same thing?

Maybe.