Rail 9.9 is our best long-travel electric mountain bike. You get an extra-beefy carbon frame, unbelievably smooth RockShox suspension, SRAMs best wireless electronic drivetrain, and a powerful Bosch Performance Line CX motor with an extra-long range battery and the new smart system LED remote and Kiox display that pair with the eBike Flow app to give you activity tracking, navigation, and Bluetooth connectivity.

• Boschs new smart system gives you all the same power and responsiveness with a new Bluetooth-connected LED remote and eBike Flow app that puts even more control and customization at your fingertips
• TyreWiz and AirWiz let you confirm your tires, fork, and shock are at the right pressure at a glance. No more getting the pump or gauge out just to check
• RE:aktiv with Thru Shaft works faster than a normal shock, so it tracks the ground better and keeps you in control
• The new frame is extra stout with a 34.9mm seat tube to accommodate more robust dropper posts, and an oversized head tube that works with burly eMTB-optimized forks for less flex and more precise steering
• Treks Removable Integrated Battery (RIB) system looks great and is super user-friendly: it fully hides the battery in the frame for protection, makes it easy remove the battery without tools and lets you mount a water bottle cage

Bosch smart system

The new Bosch smart system gives you an eMTB thats more connected than ever. The new LED remote connects with the new Bosch eBike Flow app via Bluetooth. You get tons of useful features at your fingers, and over-the-air system upgrades.

Bosch eBike Flow app

The new eBike Flow app turns your ride into a personalized experience. Use it to customize your motors assist behavior, track your ride stats, and integrate your data with apps like Strava and Apple Health. Theres even handy features like navigation and service reminders.

Removable Integrated Battery

RIB is a one-piece battery and cover with a built-in handle that can easily be removed and re-installed in the frame with no tools and no hassle. Its the most convenient way to remove your battery for transport, security, or just easier charging.

RockShox AirWiz and Quarq TireWiz

TyreWiz monitors your tire pressure while AirWiz monitors your fork and shock pressure. Set your desired pressure in the SRAM AXS app and then just check the lights before each ridered means you need a pump, green means go ride.

RockShox Super Deluxe with Thru Shaft

With the all-new RockShox Super Deluxe Ultimate Thru Shaft, you get the most refined shock on the market, with an updated air spring and an exclusive Thru Shaft damper that gives you tenacious grip, plush control, and the support you need for ripping rough descents all day.

What is the range?

To see how far you can ride your electric mountain bike on a single charge, check out Boschs range calculator. Weve auto-filled the variables for this bike model and the average rider, but you can make adjustments to get your most accurate estimate.

Geometry Chart

MLXL

function openTab(evt, tabName) { // Hide all tab content var i, tabcontent, tablinks; tabcontent = document.getElementsByClassName(“tabcontent”); for (i = 0; i < tabcontent.length; i++) { tabcontent[i].style.display = "none"; // Hide all tab contents tabcontent[i].classList.remove("active"); } // Remove the 'active' class from all tab links tablinks = document.getElementsByClassName("tablinks"); for (i = 0; i < tablinks.length; i++) { tablinks[i].classList.remove("active"); } // Show the clicked tab content and add 'active' class to the clicked tab document.getElementById(tabName).style.display = "block"; document.getElementById(tabName).classList.add("active"); evt.currentTarget.classList.add("active");}// Initialize: Show the first tab content by defaultdocument.addEventListener("DOMContentLoaded", function() { document.getElementById("SM").style.display = "block"; // Ensure first tab content is visible});