Worry less about wire failure, and more on sustaining your energy for the hill up ahead. The SI 90 WL. All of the features you should expect from a cycle computer all visible on a large easy-to-read screen. Engineered for compatibility with all wireless heart rate monitors, the SI 90 WL is the obvious solution for those who wish to gain that competitive edge. Durable and good looking the SI 90 WL’s wireless system is ideal for mounting on today’s long travel suspension forks.