Thanks for your post. I'm afraid that there isn't anywhere in the area that you can rent ski bikes and they aren't actually allowed on the slopes.
However you can hire snowmobiles from the activities centre in Grau Roig, and this can be booked directly with Grandvalira. Snowmobiles can be hired with a guide for 30 to to 120 minutes and can seat a maximum of two people.
Hope this helps but please don't hesitate to ask if you have any questions.
Kind Regards,
Ellen
The maximum number of attachments: 10
Maximum file size: 1 MB
Allowed extensions: bmp, gif, jpeg, jpg, pdf, png, txt, zip