If the garage is your household’s main entrance, mention how often it opens and closes when discussing spring replacement. A higher cycle specification may be worth comparing, but it must still be appropriate for the actual door and counterbalance system.
Ask what the proposed rating describes
A cycle rating is not a fixed calendar lifespan or a guarantee for every other component. Ask for the specification of the quoted spring option and the reason it suits your usage. Compare it with the standard replacement on the same door, using the same installation scope.
Address the system that wore out
Corrosion, condition and correct application affect spring performance. Replacing a broken spring does not make worn cables or damaged attachments new. Ask which additional defects were observed, what work is necessary and which items are optional. Never adjust spring tension yourself.
Your questions, answered.
Do more cycles mean a stronger opener is required?
The opener choice is a separate compatibility question. The spring system should be correctly matched to the door, rather than chosen by an unrelated motor-power number.
Can you promise a spring will last a certain number of years?
Actual use and conditions vary. Discuss the product specification and written warranty instead of treating a cycle figure as a guaranteed number of years.