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 31.8mm QR (SKU 0000-0575)
Seat Tube Outside Diameter31.8mm
Hex Key Size4mm
 34.9mm QR (SKU 0000-0576)
Seat Tube Outside Diameter34.9mm
Hex Key Size4mm

 zerodeg qr weight 400 400


Zero°™ Seatpost Clamps can be installed in either orientation

zerodeg qr fore 220 148zerodeg qr aft 220 148

zerodeg qr on bike fore 220 148zerodeg qr on bike aft 220 148

The inscribed arrow can be used to indicate the front or rear of the seat tube.



zerodeg qr bolted manual

Measure your seat tube to get the correct diameter.  You can measure with a caliper (best) but even a ruler will do.  Measured size may not be exactly nominal; choose the closest fit, or confirm with the frame manufacturer.

Measuring a 34.9mm diameter Seat Tube

Measuring a 31.8mm diameter Seat Tube

Measuring a 36.4mm diameter Seat Tube

The 9point8™ Zero°™ seatpost clamps are strong, light, and superbly engineered. The Quick Release (QR) version uses an engineered polymer bushing to ensure that the anodized aluminum handle and clamp ring do not gall each other.

Use our seatpost clamp with ANY seatpost; the Zero°™ clamps work equally well with a 9point8™ seatpost or any rigid or dropper post.

zerodeg qr pkg 420 183


All Zero° seatpost clamps use our Black Titanium fasteners, which are light, strong, and anti-galling.  No lubrication required for years and years of service.

Looking for a bolted, lighter seatpost clamp?  Check out our ultralight Zero° Bolted Seatpost Clamp here.


See the FIT tab above for how to measure your seat tube, to select the correct size.

Zero° QR Seatpost Clamp

  • Product Code: Zero° QR Seatpost Clamp
  • Availability: In Stock

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