Comet WF-Series Brake Discs W920GD2. COMET Discs provide exceptional quality Floating and Solid Brake Disc which offer incredible performance for the price. 2x W920GD2 Comet Brake Disc. Product Type: Brake Discs. Hole Diameter : 6.2mm. Hole to Hole : 55mm. You can send us a message by using the “Questions and answers” section towards the bottom of the page.