this came up in another post once. double straps do work with GR-9's. thats my setup. only problem is that there is only 1 set of holes on the pedal to thread 1 strap through (the rear strap, closest to your ankle). i run the front strap slightly tighter, which hugs my shoe, but it just sits over the toeclip and under the pedal. it works ok. i wanna try some sylvans for the doubles anyway and put the gr-9's on my other bike.