RockShox Reverb Top Cap B1
RockShox

RockShox Reverb Top Cap B1

$40.00
In Stock

OEM RockShox Reverb Top Cap B1 kit restores seal and smooth action to Reverb/Reverb Stealth dropper posts. Includes dust wiper, top cap and bushing (11.6818.030.000).

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Product Details

Overview & Technology

RockShox Reverb Top Cap B1 is a factory replacement top-cap assembly designed to maintain the hydraulic integrity and smooth operation of Reverb and Reverb Stealth A1–B1 dropper posts. The kit includes a precision-machined top cap, a molded dust wiper and a low-friction bushing—components engineered to keep dirt out, reduce stiction and protect internal seals. Materials and construction: the top cap is anodized, high-strength aluminum for corrosion resistance and light weight; the dust wiper is a durable elastomer that retains flexibility over a wide temperature range; and the bushing is a low-wear polymer engineered to minimize metal-on-metal contact. Together these parts extend service intervals and preserve post performance under real-world trail conditions.

Key Features & Benefits

OEM-fit replacement. This kit carries RockShox part number 11.6818.030.000 and SRAM model ID SP-SPP-T-A0, ensuring true factory tolerances and interchangeability with Reverb/Reverb Stealth A1–B1 posts. Sealing and smoothness. The included dust wiper and low-friction bushing protect internal hydraulic seals from contamination and reduce friction at the post head—helping restore crisp actuation and consistent return on every drop.

Fit, Compatibility & Installation Notes

This top cap kit is compatible with RockShox Reverb and Reverb Stealth posts, specifically A1 and B1-series models. Confirm compatibility by matching your post's model suffix (A1/B1) and the part numbers printed on the post or service manual before ordering. Installation is a moderate bike-mechanic task: you generally remove the post from the frame, disassemble the head per RockShox service instructions, replace the cap, wiper and bushing, then reassemble and bleed/purge as required. If you’re not comfortable with hydraulic servicing, a qualified shop service is recommended to avoid fluid contamination or improper reassembly.

Who This Is For

Trail, enduro and all-mountain riders who own a RockShox Reverb dropper post and want OEM-level replacement parts will benefit from this kit. It's ideal for riders noticing play, increased stiction, or persistent contamination at the post top, or those doing routine preventive maintenance. Mechanics and bike shops will appreciate the factory fit and SRM model ID for quick part matching and efficient in-shop turnaround. Riders who perform at-home servicing will value the lightweight, serviceable design and the restoration of reliable actuation.

Key Features

  • ✓ OEM replacement top cap kit for Reverb/Reverb Stealth A1–B1 posts
  • ✓ Includes precision-machined aluminum top cap, elastomer dust wiper and low-friction bushing
  • ✓ Restores seal integrity and reduces stiction for smoother post action
  • ✓ Fits RockShox part 11.6818.030.000, SRAM ID SP-SPP-T-A0
  • ✓ Lightweight kit with corrosion-resistant anodized top cap finish
  • ✓ Designed to protect hydraulic internals from dirt and moisture ingress
  • ✓ Shipping dims 1.5 x 1.5 x 1.5 inches; weight 0.63 lb

Product Identifiers

Vendor Item # 11.6818.030.000
UPC 710845782701

Frequently Asked Questions

Which Reverb models does this top cap fit?

This kit fits RockShox Reverb and Reverb Stealth A1 and B1-series dropper posts. Always confirm your post's model suffix and compare the part number (11.6818.030.000) or SRAM model ID (SP-SPP-T-A0) to ensure compatibility.

Can I install the top cap kit at home?

If you have basic mechanical skills and the correct tools, you can replace the top cap, wiper and bushing at home. However, the job may require partial disassembly of the post and attention to hydraulic seals; if you're unsure, have a trained shop perform the service to prevent contamination or improper reassembly.

How often should I replace the top cap or dust wiper?

Replace the dust wiper and top cap when you notice dirt ingress, increased stiction, or play at the post head. As part of routine maintenance, inspect these parts annually or more frequently if you ride in muddy, sandy or wet conditions.

Will this kit fix a leaky Reverb post?

This kit restores the top cap seal and bushing but won't repair internal hydraulic seal damage or a post that is actively leaking hydraulic fluid. For leaks, a full service or seal replacement may be required—consult RockShox service guides or a qualified technician.

Is this an OEM RockShox part?

Yes. This is a genuine RockShox factory replacement part with manufacturer part number 11.6818.030.000 and SRAM model ID SP-SPP-T-A0, ensuring exact fit and factory tolerances.

Buying Guide

When buying replacement parts for a dropper post, always prioritize OEM items that match your post's series and part number—they guarantee tolerances and materials designed for the post. Consider replacing the dust wiper and bushing whenever you service seals or notice impaired movement, as these small parts are crucial for keeping contaminants out and preserving internal components. If you ride in harsh conditions or log heavy mileage, plan for more frequent checks and carry basic spares for quick field maintenance. For any job beyond swapping the cap and wiper, or if your post requires bleeding, budget for a professional shop service to ensure hydraulic integrity.

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