Risk-Free Shopping—Free 2-Day Shipping on Orders Over $50* Risk-Free Shopping—Free Returns on Orders Over $50* Risk-Free Shopping—Price Match Guarantee

Detail Images

  • PRO - Tharsis XC Stem - Black

Current Color

  • PRO - Tharsis XC Stem - Black

PRO Tharsis XC Stem

sale $119.20 $149.0020% Off

Free 2-Day shipping on orders over $50*

Select your style & size:

Select options
  • Select options
    • Black, 6 deg/80mm
      sale $119.20
    • Black, 6 deg/90mm
      sale $119.20
    • Black, 6 deg/100mm
      sale $119.20
    • Black, 6 deg/110mm
      sale $119.20
    • Black, 6 deg/120mm
      sale $119.20
    152

    2 Reviews

    Details

    Clean routing while cleaning lines.

    Given that it shares the corporate family tree with Shimano, it's no surprise that PRO developed cockpit kit that allows for clean, flawless routing of the new XTR Di2. PRO's calling this system Tharsis, and the Tharsis XC Stem is one of the two key ingredients.

    As PRO's own Bas Schaapveld describes it, the Tharsis stem and handlebar combination is a "showcase for Shimano" to demonstrate the possibilities of not only clean shifting and routing, but the simple elegance of a drivetrain and cockpit designed to interface seamlessly. In addition to the internal routing, this interface also involves a clamping system that ditches the usual star nut in favor of a threaded spacer that compresses the stack, leaving the steerer tube free to house a Di2 battery.

    The internal, intuitive Di2 routing is only part of the Tharsis XC Stem's story, though, as its lightweight alloy and titanium bolts keep the claimed grams under 145 for the 100mm option. It's also stiff enough for XC sprints and durable enough to survive standard trail abuse and the occasional instances when a bike gets a little too intimate with a passing tree. After all, clean lines and stylish routing are useless if the kit wilts at the first sign of trail furniture, and the Tharsis models were developed in conjunction with the riders on Shimano's sponsored XC teams to ensure that their fortitude matches their style.

    • Item #PRS000G

    Tech Specs

    Material
    [stem] aluminum alloy, [bolts] titanium
    Length
    70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm
    Rise
    6 deg, 17 deg
    Clamp Diameter
    31.8 mm
    Bar Attachment
    4-bolt
    Claimed Weight
    [100mm] 145 g
    Recommended Use
    mountain bike
    Manufacturer Warranty
    1 year

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Unable to Preload

    • Familiarity: I've put it through the wringer

    The threaded spacers that compress the stack does not work, no matter what there is a little bit of play within the stack.

    Tried 2 of these stems, first one i tried so hard on the 32mm threaded spacers, it stripped the head. On the second one, same problem, with play within the stack.