Check The Wear On A Bike Wheel Rim

Introduction

Brake blocks wear down in use but rim brakes will also wear down the braking surface on a bike wheel rim. Aluminium rims wear faster than steel carbon rims wear fastest of all.

Step 1

<h3>Step 1</h3><p>Some modern aluminium rims designed for use with rim brakes have a groove, or a sunken dot in the braking surface. When the groove is gone the rims need to be replaced.
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Indicators

Some modern aluminium rims designed for use with rim brakes have a groove, or a sunken dot in the braking surface. When the groove is gone the rims need to be replaced.

Step 2

<h3>Step 2</h3><p>If the braking surface is worn slightly concave it shows your bike wheel rims are getting near the end of their useful life. There may be some other signs of visible wear that indicate the bike wheel rim may need replacing.
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Inspect the bike wheel rim

If the braking surface is worn slightly concave it shows your bike wheel rims are getting near the end of their useful life. There may be some other signs of visible wear that indicate the bike wheel rim may need replacing.

Step 3

<h3>Step 3</h3><p>If your bike wheel bike wheel rims have seen long service check them at least as often as you change the tyres. If the walls – the braking surface – are less than 1mm thick consider replacement.
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1mm

If your bike wheel bike wheel rims have seen long service check them at least as often as you change the tyres. If the walls – the braking surface – are less than 1mm thick consider replacement.

Pro Tip

For safety, the front bike wheel rim is more critical. If the rear bike wheel rim fails dramatically you stop. If the front fails you are more likely to crash.