If you can't attach the frame straps because your frame is too chunky it's usually possible to secure them around another part of the bike, usually the seat post or the handlebar stem.
Longer frame straps are also available to fit the Atera Strada range, the Genio Pro and the Trail. These longer frame straps are 600mm long and replace the standard 350mm bike arm strap, to enable the arms to accommodate larger frames.