The little wireless CarPlay dongle is the cheapest way to cut the cable, and most of the time the reviews you read are about whether it connects fast enough. The reviews you should read are the one-star ones written a year later.

You pull out of a shaded canyon onto an open ridge at noon, glance down at your new handlebar screen, and the map is just a glossy rectangle reflecting the sky back at you. The colors looked punchy in the garage; in direct sun they have vanished.

You and your partner just bolted one CarPlay screen to the shared bike, and the first weekend ride starts with a small standoff: it pairs to whoever rode last, so now one of you is digging through Bluetooth menus in the driveway while the other waits with a helmet on.

You buy an Android Auto screen for the bike, mount it, pair your phone, then go to load Calimoto or Rever for that weekend route, and the app is simply not in the list.

You pull out of the garage, the dongle in your tank bag flashes its pairing light, CarPlay shows up on the bars for a second — and then it is gone. The phone nags you to turn Wi-Fi back on, you do, and it drops again before you reach the first stoplight.

You finally decide your phone in a tank-bag pocket is not a navigation system, and within an hour of shopping you have eight tabs open: a 5-inch screen, a 7-inch screen, two that have cameras built in, one with radar, and a price spread from $140 to $400.

You are parked at a scenic overlook waiting out a rain cell, and the CarPlay screen mounted to your bars is right there at eye level.

A driver merges into your lane without looking, you grab the brakes, and the moment is over in two seconds. Back home you wish you had it on video — and then realize the slick CarPlay box on your bars only ever showed you Maps; it never recorded a frame.

You are stopped at a light in a downpour, gloves on, trying to skip to the next song. The screen on your handlebars reads every drop rolling across the glass as a fingertip and starts scrolling on its own. The same touchscreen in a car would never do this, because it never gets wet.

You finish mounting a wireless CarPlay screen on the bars, fire up the bike, and the map snaps on perfectly — but the turn-by-turn voice is dead silent in your helmet, even though the navigation is clearly running.