Avid Post Spacer
Post Spacer
Post Spacer
Avid

Avid Post Spacer

In Stock

Precision post-mount spacers from Avid that let you run larger rotors without changing calipers. Includes stainless caliper mounting bolts for both CPS and standard setups.

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Available Options

Option Price Availability
Avid, Post Spacer Set, 10 S (Front 170), Includes Stainless Caliper Mounting Bolts (CPS & Standard) — In Stock
Avid, Post Spacer Set, 20 S (Front 180/Rear 160), Includes Stainless Caliper Mounting Bolts (CPS & Standard) — In Stock
Avid, Post Spacer, Disc Brake Adaptor, Caliper: Post mount, Frame/Fork: Post mount, F203 — In Stock

Product Details

Overview & Technology

Avid Post Spacer Set is a simple, effective solution for increasing rotor clearance on post-mount calipers. The kit shifts the caliper outboard to accommodate larger rotors—helpful when upgrading rotor size or swapping wheelsets—while keeping your existing post-mount caliper and frame/fork interfaces. The spacers are precision-machined for consistent alignment and repeatable pad-to-rotor positioning. Each kit ships with stainless caliper mounting bolts (compatible with both CPS and standard mounting hardware) to ensure corrosion resistance and secure fastening in variable weather and trail conditions.

Key Features

Built for reliable rotor upgrades. The Avid Post Spacer Set is available in common increments (for example 10mm and 20mm variants) so you can match the spacer to the rotor size change you need—170mm up to 203mm in supported variants. The included stainless mounting bolts make installation straightforward and durable. Real-world benefits: • Precision-machined aluminium alloy spacer (anodized) for stiffness and low weight. • Stainless caliper mounting bolts included for corrosion resistance and long-term fit. • Options for front 170mm, front 180mm/rear 160mm, and F203 (203mm) configurations to cover most upgrade scenarios.

Fit & Compatibility

The Post Spacer Set is designed for post-mount caliper systems and pairs with frames and forks that use post mounts. Select the spacer size that matches the rotor increase: e.g., the 10 S kit suits a front 170mm conversion, the 20 S kit covers front 180mm or rear 160mm changes, and the F203 variant supports 203mm front rotors. Hardware is included for both CPS and standard caliper mounting patterns so you can bolt the spacer and caliper directly to the post mount. Always double-check rotor-to-frame/fork clearance and follow caliper alignment steps after installing spacers—some frames or forks with tight stays may limit available rotor sizes.

Who It's For

This adapter set is for mountain riders who want to upgrade rotor size without changing calipers or brake platforms: riders adding more stopping power for heavy trail days, bikepackers fitting bigger rotors for long descents, and mechanics who need a compact, reliable spacer option in the toolbox. If you're converting from smaller rotors to 180mm or 203mm for increased heat capacity and braking leverage, a post spacer kit is a low-cost, low-weight way to get there while retaining your current brakes.

Key Features

  • ✓ Precision-machined aluminium spacer for stiff, lightweight construction
  • ✓ Includes stainless caliper mounting bolts for CPS and standard mounts
  • ✓ Available sizes support 170mm, 180mm/160mm and 203mm rotor upgrades
  • ✓ Direct fit for post-mount calipers — no adapter plate required
  • ✓ Anodized finish resists corrosion and trail wear
  • ✓ Small footprint and low weight — ideal for trail and bikepacking use

Specifications

Caliper mount Post mount
Frame/Fork mount Post mount
Hardware Yes
Rotor in mm F170

Product Identifiers

Vendor Item # 00.5318.008.000
UPC 710845714368

Frequently Asked Questions

Which spacer size do I need for my rotor upgrade?

Choose the spacer that matches the rotor size increase. The 10 S kit is aimed at front 170mm setups, the 20 S covers front 180mm or rear 160mm swaps, and the F203 variant is for running 203mm front rotors. Measure your current rotor size and the target rotor and pick the spacer accordingly.

Are the mounting bolts included and what material are they?

Yes — the kit includes stainless steel caliper mounting bolts compatible with both CPS and standard mount patterns. Stainless hardware resists corrosion and keeps the assembly secure in wet or muddy conditions.

Will I need to change brake hoses when installing these spacers?

In most cases no — small spacer offsets do not require new hoses. However, if the spacer dramatically alters caliper orientation or you move to a much larger rotor that changes hose routing, you may need to re-route or replace hoses. Always check hose slack and fitting clearance after installation.

Can I use the spacer on both front and rear brakes?

Yes, but pay attention to the specific kit. Some variants are intended for front conversions (e.g., 170mm or 203mm front) while the 20 S variant covers front 180mm and rear 160mm scenarios. Confirm clearance on the frame/fork and selection of the correct spacer for front vs rear.

How should I torque the caliper mounting bolts after installing the spacer?

Tighten bolts to the brake manufacturer's recommended torque values — typically in the 6–8 Nm range for many caliper bolts. If unsure, consult your brake or bike manufacturer's documentation; proper torque prevents loosening and preserves alignment.

Will using a spacer affect brake feel or pad contact?

A properly installed spacer preserves pad-to-rotor alignment so braking feel should remain consistent. After fitting the spacer, re-center the caliper and bed in the pads. Incorrect installation or insufficient clearance can cause noise or uneven pad wear, so check alignment and perform a test ride.

Buying Guide

When choosing a post-mount spacer, prioritize the exact rotor sizes you plan to run and confirm your frame or fork has sufficient clearance. Pick the smallest spacer that achieves the target rotor size—this minimizes changes to caliper alignment and reduces the chance of interference. Also consider hardware: kits that include stainless bolts (like this Avid set) save you a trip to the bolt drawer and ensure long-term corrosion resistance. If you run aggressive downhill or heavy bikepacking loads, opt for the larger rotor-compatible variants for better heat management and braking leverage.

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