How do I tension the running belt on my treadmill?

If you feel a slipping sensation, turn off the treadmill, then tighten both rear roller bolts using an Allen wrench, turning them 1/4 turn to the right. Check for further adjustments if needed but never exceed 1/4 turn at a time.

From the official Tempo Fitness Evolve manual, page 28

Have a follow-up question?

Answers from the official manual.

Common questions