![]() Frankly, I think Trek should save the rider a lot of money and hassle and just ship the bike with a digital air pressure gauge and a digital shock pump. We’re talking about $12,500 to $13,500 bicycles here: any added gizmo should be flawless and seamless. Then there’s the drawbacks: all of those batteries, the increased size of the shock (which eats into clearance), and the fact that you’re supposed to remove the TyreWyz and install a little plastic spacer if you’re going to inject tubeless sealant through the valve. For example, to see pressure changes in the shock, I’d need to open the app, connect the AirWizard, read the pressure, adjust the pressure in the shock, close the app, open the app, reconnect the AirWizard, read the pressure… repeat until I hit the proper pressure. But the wizards don’t seem to wake up consistently, and app pairing is wonky. Matt PhillipsĪssuming they work as they should-one of my TyreWizards read minus 23.5psi with no pressure in the tire and zero with the tire at 23.5psi-it is, in theory, nice to have a quick way to check and see if your pressures are correct. I also wish you could set a smaller plus/minus range: 22.5 PSI and 24.5 PSI are, to me, a lot different than 23.5.Ī light (not shown) on the fork and shock AirWiz tells you if the air pressure is within your set range. I don’t like that you can only set PSI in whole numbers, and I prefer my tires at 23.5 in the front and 26.5 in the rear (those pressures result from a lot of time and experimentation). ![]() It’s much the same for the TyreWiz, though you can select a plus/minus PSI range of one to 20 (?) PSI. The app suggests suspension pressures, but I found them way off for both the fork and the shock. Then, after you know your suspension pressures, you use SRAM’s AXS app to set the AirWizards target pressures: When they drift plus or minus five PSI from the target pressure you selected, you’ll see a red light. You still set up your suspension the old-fashioned way: put enough air in the fork and shock to achieve your sag. AirWiz simply tells you if your pressure is in the proper range. ![]() Note that the AirWiz is not the same as SRAM’s ShockWiz: The latter is far more advanced and collects much more information. Green light on the TyreWiz means you’re in the right pressure range. At present, you can’t pair a heart rate monitor to the Kiox (or the Flow app), the only service integration built into the Flow app is Apple Health, and there’s no web portal for accessing the information. It connects to the Smart System bike and records activates-a GPS track, elevation, speed, distance, power, and cadence-which riders can then download as a GPX file and manually upload to their favorite ride logging site. It is a bright and clear display, though it’s not customizable and has some other faults I’ll get into later.Ī new smartphone app named Flow ties the whole system together. This enduro placement keeps it more protected in a crash but also harder to look at while riding. On the Rail, the Kiox display resides on the top tube just behind the stem. The lower profile remotes of Specialized and Shimano seem more suitable for mountain bike riding. The latter is large and seems overdone (six buttons, lots of lights), and it looks like it just wants to get wrecked in a crash. Other new Smart System bits include a new Kiox 300 color display and a new handlebar remote. Unfortunately, the 750Wh battery does not fit in the size small Rail frame, so those must make do with a 625Wh battery. The range is very condition-specific, but I did a 31-mile ride with over 2400 feet of climbing using a combination of eMTB (mostly) and Turbo (occasionally) modes and finished with plenty of battery remaining (I forgot to write it down, but I remember being impressed: Around 40 percent remaining sticks in my brain). (Norco still wins the battery game with its optional 900Wh battery for the latest VLT models.) There’s also a new 4A charger that’s only compatible with the new battery-Bosch’s older charger does not work with the new battery, even though the plug looks the same. That gives the Smart System Trek Rail one of the biggest batteries: larger than a Specialized Levo’s 700Wh battery and the new Pivot Shuttle’s 726Wh battery. One of the most significant changes is the new, larger, 750Wh battery (for most sizes-more on this below), a significant bump up from Bosch’s previous 625Wh battery. But while motor performance hasn’t changed, almost everything else has. ![]() The Rail 9.8 and 9.9 use Bosch’s new e-bike ecosystem, which the company calls “Smart System.” One important note: Bosch’s 2022 Performance Line CX motor for Smart System offers identical performance to the previous Performance Line CX. Bosch claims 85Nm of max torque, but the motor feels stronger. ![]()
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