Transport your bikes your way, anywhere you go The Saris Thru Axle Trap is a versatile bike fork mount that can be used to transport or store bikes with thru-axles. It is compatible with four thru axle spacing standards: 15mm x 100mm, 15mm x 110mm, 12mm x 100mm, and 20mm x 110mm. The bike rack accessory can be mounted directly to any surface, or it can be used with the Saris Triple Track or Single Track specialty racks.