RockShox Reverb Bulk U-Cup Inner Sealhead
Reverb Bulk U-Cup Inner Sealhead
RockShox

RockShox Reverb Bulk U-Cup Inner Sealhead

$55.00
In Stock

OEM-quality Reverb U-Cup inner sealheads in a 10-pack, including topout bumpers for Reverb Stealth A2 & B1. Perfect for routine dropper post service and rebuilds.

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Product Details

Overview & Technology

RockShox Reverb Bulk U-Cup Inner Sealhead (Manufacturer Part #: 11.6818.035.015, SRAM Model ID: SP-SPP-T-A0) is a service-grade replacement sealhead assembly supplied in a convenient 10-piece bulk pack. Each unit includes a precision-molded U-cup inner seal and a matching topout bumper to restore smooth, leak-free operation to Reverb Stealth A2 and B1 dropper posts. The U-cup is made from a high-durability elastomer formulated to resist compression set and hydrocarbon degradation, while the topout bumper uses a resilient polyurethane compound for consistent damped travel end behavior. These components are produced to OEM tolerances so the seal lips, inner geometry and flange fit the Reverb Stealth cartridge exactly, reducing stiction and minimizing air/oil migration for reliable, repeatable post performance.

Key Features

Bulk 10-pack for workshop convenience: includes 10 complete U-cup inner sealheads and topout bumpers—perfect for mechanics, teams or riders who maintain multiple posts. • OEM fit and finish — manufactured to RockShox/SRAM specifications for Reverb Stealth A2 & B1. • Durable elastomer seals — engineered for long service life and consistent sealing under pressure. • Resilient topout bumpers — protect post internals and maintain smooth stroke termination. • Compact packaging — SKU 560377 ships light and takes minimal shelf space.

Fit & Compatibility

Direct replacement for RockShox Reverb Stealth dropper posts using the A2 and B1 internal cartridge configuration. Confirm compatibility by matching SRAM Model ID SP-SPP-T-A0 or Manufacturer Part # 11.6818.035.015 with your service manual before ordering. These sealheads are intended for Reverb Stealth internals only; other Reverb variants or non-SRAM posts may use different seal geometries and materials. For best results, install during a full service, use recommended suspension grease or RockShox assembly paste, and follow RockShox torque and bleeding procedures when reassembling the post.

Who It's For

Mechanics, race teams, bike shops and do-it-yourself mountain bikers who perform regular maintenance on multiple dropper posts will value this bulk pack. If you rebuild Reverb Stealth posts frequently or stock spare parts for a fleet, this 10-piece pack reduces downtime and ensures you always have the correct OEM sealhead on hand. Riders who prefer to do occasional home service can also buy this pack to cover multiple services or multiple bikes; single-service hobbyists may prefer a 1–2 piece kit, but the bulk option brings substantial cost-per-unit savings.

Key Features

  • ✓ Bulk pack of 10 U-cup inner sealheads and topout bumpers
  • ✓ OEM fit for Reverb Stealth A2 & B1 dropper post cartridges
  • ✓ High-durability elastomer U-cup resists compression set
  • ✓ Polyurethane topout bumpers for consistent stroke damping
  • ✓ SRAM Model ID SP-SPP-T-A0 / Mfr Part # 11.6818.035.015
  • ✓ Ideal for shops, teams, and riders who service multiple posts

Specifications

Misc Qty 10 (Includes U-Cup Seals) - Reverb Stealth A2 and B1

Product Identifiers

Vendor Item # 11.6818.035.015
UPC 710845784651

Frequently Asked Questions

What exactly is included in this bulk pack?

The pack contains 10 complete inner sealhead assemblies, each with a precision-molded U-cup seal and a topout bumper. It's intended as a workshop bulk supply for Reverb Stealth A2 and B1 rebuilds.

Will these seals fit my Reverb post?

These are designed specifically for Reverb Stealth A2 and B1 internal cartridges. Check your post's service manual or the SRAM Model ID SP-SPP-T-A0 / Mfr Part # 11.6818.035.015 to confirm compatibility before purchase.

How difficult is installation?

Installation is moderate: it requires disassembly of the Reverb Stealth cartridge, clean workspace, proper lubrication and basic tools. If you're unfamiliar with dropper post service, we recommend following the RockShox service guide or using a qualified shop.

What grease or lubricant should I use when installing the seals?

Use RockShox recommended suspension grease or a light assembly paste compatible with elastomers. Avoid petroleum-based oils that can degrade seal compounds. Always apply a thin, even coat to help seating and reduce initial stiction.

How often should I replace the inner sealhead?

Replacement intervals depend on use and conditions; heavy, muddy riding or noticeable oil leakage/stiction indicates a service is needed. As a guideline, inspect seals at annual service or every 200–300 hours of riding.

Can I use these seals on other brands or non-Stealth Revеrb posts?

While the seals may physically resemble other parts, they are produced to RockShox OEM specs for Stealth A2/B1 cartridges. Using them in non-compatible posts can cause poor sealing or damage—always verify fit before installing.

Buying Guide

When buying replacement seals for dropper posts, prioritize OEM-fit components to ensure reliable sealing and correct geometry. Bulk packs like this 10-piece set are ideal for shops, team mechanics, or riders with multiple bikes; they reduce per-unit cost and keep you ready for routine maintenance. Before ordering, verify your post model and internal cartridge version. Keep basic servicing supplies on hand—assembly paste, clean lint-free rags, and the correct bleed kit—so you can complete the job cleanly and confidently.

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