What dropper posts is the 31.6mm Dropper Post Shaft Clamp compatible with?

The 31.6mm Dropper Post Shaft Clamp is compatible with any round dropper post measuring exactly 31.6mm in diameter, including Fox Transfer, RockShox Reverb, OneUp V2, PNW Loam, PNW Rainier, BikeYoke Revive, and KS Lev. Always verify compatibility by checking the laser-etched diameter on the post itself, as a bike frame's seat tube size does not always match the installed post diameter.

How does the 31.6mm Dropper Post Shaft Clamp differ from a universal vise clamp or rag wrap?

Generic vise jaws and rag wraps concentrate clamping force at two contact points, increasing the risk of scratching or deforming thin-walled dropper shafts. The 31.6mm Dropper Post Shaft Clamp provides full 360° surface contact, distributing vise pressure evenly around the entire shaft circumference. This makes it possible to apply the torque needed to loosen tight cartridge or head assemblies without damaging the anodized finish.

Who should use the 31.6mm Dropper Post Shaft Clamp?

This clamp is designed for mountain bike mechanics and home workshop riders who service 31.6mm dropper posts at the bench. It is the correct tool whenever a cartridge or head assembly must be loosened or reinstalled, situations where the post shaft needs to be held rigidly while torque is applied and where unprotected vise jaws would risk surface damage.

What does the 31.6mm Dropper Post Shaft Clamp cost and is it in stock for buyers in Canada?

The 31.6mm Dropper Post Shaft Clamp is priced at CAD $29.49 and is currently in stock at Shockwave Parts. Tracked shipping within Canada starts at $8.49 with a maximum of $14.99, and orders over CAD $89 qualify for free shipping. Shockwave Parts ships from Canada, and international orders over the applicable threshold also qualify for free international shipping.

How long does shipping to Canada take for the 31.6mm Dropper Post Shaft Clamp?

Shockwave Parts processes orders fast, with items shipping from Canada within 1 business day. Domestic Canadian orders ship with tracked shipping starting at $8.49 (maximum $14.99), and orders over CAD $89 ship free. Because the warehouse is located in Canada, delivery timelines for Canadian customers are shorter than cross-border alternatives.

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Shockwave Parts

31.6mm Dropper Post Shaft Clamp | Straight/Angled

$29.00 CAD

Sale Sold out sorry :(

Shipping calculated at checkout.

Which Version? Straight Angled

31.6mm Dropper Post Shaft Clamp | Straight/Angled

Designed specifically for 31.6 mm diameter dropper posts. This clamp allows you to securely hold the post tube in a bench vise during cartridge or head service without damaging the anodized surface.

Available in two versions at the same price: straight or angled 35°. Both use the same 360° clamping surface and hold identically, the only difference is how the post sits relative to your vise.

Which version should you pick?

Straight: best if you have a big wide vise where you can clamp off to the side and let the post hang past the edge.

Angled 35°: best if you have a small vise, or one with a wide bottom casting that gets in the way of long straight parts. The angle sends the post off to the side so it clears the center of the vise instead of running into it.

Why You Need This

Dropper shafts are thin-walled and spin freely once removed from the frame; without a clamp they’re difficult to service.
Cartridge and head assemblies are often torqued tight, requiring a stable grip to loosen safely.
Provides full 360° surface contact when used correctly, minimizing risk of scratches or deformation.
Whichever version you choose, the goal is the same: hold the post solid without fighting your vise for room.

⚠️ Warning

Even a single grain of dirt or uneven clamping can permanently scratch or dent the shaft. If the post slips:

Clean both the clamp and the shaft with isopropyl alcohol.
Wrap the shaft in one layer of paper towel or shop towel.
Re-clamp using even pressure, never crushing force.

Never clamp over the collar, actuator, or cable entry.

How to Use

Follow the safe procedure used for all large-diameter clamps:

Clean the shaft thoroughly with isopropyl alcohol.
Wrap in one layer of paper towel or shop towel.
Close the clamp and apply even clamping pressure in a bench vise.
Angled version: set it in the jaws with the tilt running clear of the vise center before you close it, so you are not repositioning under load.
Proceed with cartridge or head service.

Complete guide: How to Use Big Diameter Shaft Clamps

Compatibility