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The TSDZ2 Mid Drive Motor - Torque Sensing Pedal Assist: The harder you pedal - the harder the motor works with you. 4 levels of assist provide smoothly integrated power ranging from +36-300%, allowing you to conquer virtually any hill with ease. These kits retrofit most bicycles by replacing the bottom bracket & crankset assembly - to utilize the existing drivetrain & gears for maximum efficiency.
The XH-18 Display - Left Handlebar Mount Half Twist Action:The XH-18 Display Mounts on the left side of your handlebar, featuring a spring loaded half twist mechanism to cycle between the 4 levels of assist.
The TSDZ2 Mid Drive Kits are designed to fit bikes with threaded JIS/BSA bottom brackets. This means a 68mm (2.68 in.) to 73mm (2.87 in.) wide bottom bracket shell (unless you have the 100mm TSDZ2 model, then 100mm is the desired measurement) and 35mm (1.37 in.) inside diameter. Known as JIS or Japanese Industrial Standard, which is very similar to our standard here in the US commonly referred to as "square tapered spindle", ISO/English, BSA, British, or "threaded". More than 95% of bikes with the correct measurement bottom bracket will work without a problem, but keep in mind, after 2012, a lot of higher end and full suspension bikes started utilizing other types of bottom brackets. PF30, BB30, and Shimano Press Fit 41 BB92 do have adapters on the market to make this motor compatible, but other style bottom brackets not mentioned are incompatible without custom machining.
To prepare, you need to have a compatible bare bottom bracket shell. If you are doing a conversion with an existing bicycle, you will have to first unhook the chain from your current chain ring, and uninstall and remove the complete bottom bracket assembly from your bicycle. For the XH-18 Display, you will also need to remove your left grip, and possibly more depending on the order of your cockpit setup. Once you are prepped for the install, the steps are as follows:
* Note - While TSDZ2 will function without the speed sensor or lights connected, it is highly recommended that you install them as is required by law in some areas.