Cane Creek IS Shim Spacers
IS Shim Spacers
Cane Creek

Cane Creek IS Shim Spacers

In Stock

Ultra-thin Cane Creek IS shim spacers (0.25 mm) in a 10‑piece pack for fine headset preload and precise stack-height adjustment on 1-1/8" steerer tubes.

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Available Options

Option Price Availability
Cane Creek, Headset Spacer, 1 1/8'' X 0.25 mm, 10pcs — In Stock
Cane Creek, Headset Spacer, 1 1/8'' X 0.5 mm, 10pcs — In Stock

Product Details

Overview & Technology

Cane Creek IS Shim Spacers are precision-cut, ultra-thin shims designed to give mechanics and riders micro-adjust control over headset preload and stack height. Each pack contains 10 shims at 0.25 mm thickness (also available in 0.5 mm), sized specifically for 1-1/8" steerer tubes. Manufactured from corrosion-resistant stainless steel, these shims resist bending and hold their thickness under clamping loads — giving consistent, repeatable headset bearing engagement without the creep associated with softer materials. The slim profile is ideal for eliminating tiny gaps or taking the very slight slack out of headsets that otherwise feel just shy of perfect.

Key Features & Benefits

Precision tolerance: 0.25 mm thickness for micro-adjustments — ideal when a full 1 mm spacer change is too coarse. Use single or stacked shims to dial in exact bearing preload. Durable stainless construction: Thin but strong material that resists deformation under clamp pressure, ensuring long-term fit and consistent performance. Lightweight and thin profile preserves headset stack while correcting play. • 10 pieces per bag for multiple adjustments or spares • Fits 1-1/8" steerers and IS-style headset interfaces • Low-profile silver finish blends discreetly with most headsets

Fit, Installation & Compatibility

These shims are designed for 1-1/8" steerer tubes and IS-style headset assemblies. Before installing, verify inner diameter clearance on your top cover/compression ring — the shim should sit flat and flush without forcing. For carbon steerers, place shims between metal parts (not between metal and carbon) and avoid excessive torque; use a torque wrench and manufacturer's torque specs to prevent damage. Installation tip: clean mating surfaces, slide the shim(s) into place, set headset preload, then cycle the bars to check for binding. Stack multiple shims for thicker increments (e.g., two 0.25 mm for 0.5 mm) or mix with standard spacers for coarse adjustments. Not recommended as a substitute for a missing crown race or structural parts.

Who These Shims Are For

Mechanics, bikefitters, and meticulous riders who demand exact headset action will appreciate these shims. They’re perfect for riders who want to remove tiny amounts of play without changing visible spacer stacks or altering headset geometry. Whether you race road, dial in a commuter's cockpit, or fine-tune a workshop customer's headset, the Cane Creek IS shims are a small, inexpensive tool that delivers precise, repeatable results.

Key Features

  • ✓ 0.25 mm ultra-thin shims for micro headset adjustments
  • ✓ Pack of 10 shims — spares for multiple installs and tweaks
  • ✓ Corrosion-resistant stainless steel resists deformation
  • ✓ Fits 1-1/8" steerer tubes and IS-style headset assemblies
  • ✓ Stackable for precise 0.5 mm, 0.75 mm or custom thickness
  • ✓ Low-profile silver finish blends with most headsets
  • ✓ Lightweight — adds negligible weight to cockpit stack

Specifications

Height 0.25mm
Primary Color Silver
Steerer Tube 1-1/8''

Product Identifiers

Vendor Item # HSS2050
UPC 840226031712

Frequently Asked Questions

What material are the shims made from?

These shims are made from corrosion-resistant stainless steel, chosen for its ability to hold thin tolerances and resist bending under clamping loads, giving consistent headset preload over time.

Will these fit my headset?

They are sized for 1-1/8" steerer tubes and IS-style headset assemblies. Check the inner diameter of your top cover and compression ring before installation to ensure the shim will sit flush without interference.

Can I use these on a carbon steerer?

Yes, but with caution. Use the shims between metal components (not directly against exposed carbon) and follow the torque limits recommended by your steerer/headset manufacturer. Over-tightening can damage carbon.

How many shims should I use at once?

Use a single 0.25 mm shim for the finest adjustment. You can stack shims for larger increments (two for 0.5 mm, three for 0.75 mm, etc.) or combine them with standard spacers to reach your desired stack height.

Can these replace my headset spacers?

No — these are thin shims intended for fine preload and alignment adjustments, not as structural replacement for standard headset or stem spacers which provide primary stack height and support.

Do I need any special tools to install them?

No special tools are required beyond typical headset tools: a torque wrench for the stem/top cap bolt and a clean cloth. It's helpful to use a thin pick or tweezers to position the shim if access is tight.

Buying Guide

Headset shims are a simple, cost-effective way to fine-tune headset preload and eliminate tiny amounts of play without changing the visible spacer stack. Choose 0.25 mm shims when you need micro adjustments; for larger corrections select 0.5 mm or stack multiple 0.25 mm shims. When buying, confirm steerer diameter and headset style, check material (stainless steel for durability and thinness), and keep spare shims in your toolbox for on-trail adjustments or workshop use.

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