Business at the front.
If you're running a Di2 mountain drivetrain, there's nary a cleaner way to route your cabling than with a PRO Tharsis Trail Stem and a Tharsis Carbon MTB Handlebar, which allow for internal Di2 cable routing and battery mounting. 3D-forged and CNC-machined Al-7075 construction with a wide faceplate makes the Tharsis Trail Stem strong enough to handle aggressive enduro riding, and sleek routing underneath the faceplate creates a path for a Di2 shifter wire to connect to an internally mounted battery. The BTR expander replaces the typical star nut system for adjusting headset tension and opens up space for mounting a Shimano Di2 battery inside the fork steerer.
0° rise. 31.8 mm clamp diameter. 1 1/8" steerer diameter. Claimed weight is 95 g (35 mm length).
Note: BTR expander system requires a 32 mm headset wrench such as the Park Tool HCW-15.
Articles will open in new tab.
Comparing bottom bracket types and standards.
You wanna go fast? Join the ceramic revolution!
Make your upgrades count. Here's the equipment that will help you ride your bike faster.
Campagnolo vs. Shimano vs. SRAM: demystifying groupsets.
What to consider when selecting a crankset for your road bike.