RAM Motorcycle Fork Stem Mount with STANDARD 3" arm & cradle RAM-HOL-TO10 for the TomTom XXL 535 T/540 Series/540 WTE Series/ 550 Series (5” screen).
RAM-B-176-TO10 fork stem mount for the TomTom XXL (easyport) -

The Fork Stem Mount by RAM is a simple and clean way to mount your XXL on a motorcycle.
Simply slide the RAM base into the hole of the stem and tighten the machine screw with a wrench. With a RAM rubber ball base securely installed, your RAM mount can be positioned and secured with ease and is ready to support your TomTom. Keep your device within easy reach and adjust for perfect viewing with the turn of a single adjustment knob. RAM’s patented rubber ball and socket design also dampens shock and vibration helping to extend the life of your mobile device. Elegant hourglass shape compliments the sleek lines of any Motorcycle. Able to fit fork stems from 1/2'' to 1 1/4'' ID or 13mm to 32mm ID, this new product will fit many popular makes and models.
This RAM motorcycle mounting option includes the TomTom XL Cradle RAM-HOL-TO10.

(u indicates the use of a poly bag)

NB: Device shown in images is for demonstration only and will not match your device.