Sorry i was away ......should have responded before ...
Well i have been using 17" spinners on my Gli for the last 7 months and i have no problem so far with them .... and trust me if you buy a good brand which have calibrated the spinners to the right level there is no issue even in high speeds ......
you can check my ride at
https://www.pakwheels.com/forumreply_az_TopicID!74680~ForumID!31~pw.html
I got mine from Dubai and they did not cost me as much cuz me got umm from a friend .....