Wheels Manufacturing Freewheel / BB Spacer

Wheels Manufacturing Freewheel / BB Spacer (1.0mm) is a precision shim designed to give you reliable, repeatable spacing when adjusting cassettes, freewheels and bottom bracket cups. Each shim is stamped from corrosion‑resistant stainless steel, finished with deburred edges and tight thickness tolerances so you get consistent results every time.

These shims are available in small, serviceable packs (bag of 10) so you always have spares for wheel builds, hub maintenance or on‑trail fixes. The 1.0mm thickness is a common go‑to for small chainline and cog clearance corrections without altering drivetrain geometry significantly.

Precision thickness: 1.0mm nominal thickness with manufacturing tolerances kept tight to ensure predictable spacing when stacked or used alone. That means fewer trial-and-error adjustments when chasing cog rub or setting chainline.

Durable stainless construction: stamped from 18/8 stainless steel for corrosion resistance and long life in wet, salty and muddy conditions. Smooth, deburred edges prevent damage to splines, seals and bearing surfaces during installation.

These spacers are a universal solution for many cassette, freewheel and bottom bracket applications — use them behind the largest sprocket of a cassette or freewheel, or behind a bottom bracket cup where small axial adjustments are required. They are thin shims intended for fine tuning rather than structural loads.

Because they are flat, keyed shims are not required — they sit between metal surfaces to shift component position by exactly 1.0mm per shim. They work with most hub and freehub systems as well as typical threaded freewheels and bottom bracket cups; always check manufacturer tolerances for high-end sealed systems before stacking multiple spacers.

Mechanics, bike builders and home wrenches who want a small, reliable way to adjust cog spacing and chainline will find these shims indispensable. They’re ideal for wheel builds, swapping cassettes/freewheels, setting BB preload on older threaded systems, and for carrying in a workshop kit as a go-to spacing solution.

If you frequently service wheels or race on mixed surfaces where quick spacing tweaks are common, a bag of 10 gives you spares for multiple jobs without buying individual pieces.

When buying freewheel and cassette spacers, choose the thickness you need (1.0mm, 1.5mm, 2.0mm) based on the small axial adjustments you want to achieve. Stainless steel shims are a good all‑round choice for durability and corrosion resistance; aluminium shims are lighter but less durable.

Buy multi‑packs (bag of 10) if you service wheels frequently — you’ll save time and avoid frustrating trips to the parts store. Keep a few in your workshop kit and 1–3 in your saddlebag for field fixes.