The SHOCKWAVE DUMM-DROP Universal Dropper Seatpost Support revolutionizes the maintenance and installation of dropper seatposts in the workshop. Designed and manufactured in Canada from technical PETG, this ingenious tool holds the post in a stable position above the seat tube, allowing you to work simultaneously on the handlebar lever and the post itself, without risking bending cables or hydraulic hoses. A must-have for any serious bicycle mechanic.

Technical Highlights

• Universal compatibility: Compatible with all standard dropper post diameters: 27.2 mm, 30.9 mm, 31.6 mm and 34.9 mm. The kit includes 3 interchangeable adapters (30.9 and 31.6 mm share a common adapter for quick changes).
• Advanced TPU strap system: Wide non-slip TPU strap that perfectly conforms to all post diameters, ensuring a firm hold without marking or damaging the finish.
• Integrated bleed port: Rear service port allowing you to bleed hydraulic posts (RockShox, Fox, etc.) without removing the support, a considerable time saver in the workshop.
• Cable and hose protection: Elevates and stabilizes the dropper post so the cable housing does not twist during handlebar lever actuation.

Professional Design for Heavy Use

The DUMM-DROP SHOCKWAVE is designed for daily use in professional workshops. Its compact footprint and replaceable adapters make it a robust and durable tool. Manufactured from PETG (high-strength technical plastic), it withstands repeated handling while remaining lightweight. Each kit includes the support base, 3 adapters for all sizes, and 2 TPU straps (one installed + one spare).

Simplified Instructions

• Step 1: Choose the adapter corresponding to your dropper post diameter and insert it into the support base.
• Step 2: Place the post in the cradle, align the cable or hose routing, then secure with the TPU strap.
• Step 3: Tension the cable (or connect the hose) while actuating the handlebar lever — the post remains stable.
• Step 4 (for hydraulic posts): Position the bleed port on the rear service port and perform the bleed without removing the tool.
• Step 5: Once finished, release the strap and remove the tool.

Compatibility and Standards

Compatible with all round dropper seatposts on the market, whether cable-actuated (mechanical) or hydraulic. Works with RockShox Reverb, Fox Transfer, OneUp V2/V3, PNW, BikeYoke Revive, KS, Brand-X Ascend brands, and many others. Ideal for initial installation, cable/hose replacement, hydraulic bleeding, or any maintenance requiring a virtual third hand.