28-5M-25F HTD 5M Pilot Bore Timing Pulley - 28 Teeth, 25mm (17mm Bore & 4mm Key)

Check the markings first. Most belts have their size printed on the back, for example A24, SPZ1000 or 8PK1200. Type that code into the search bar to find the exact match.

Markings worn off? Measure across the top of the belt for the width, and its depth. For the length, wrap a piece of string round the belt, mark where it meets, then lay the string flat and measure it.

Timing or ribbed belt? Count the teeth or ribs, and measure the gap between them.

Full step-by-step guide: How to measure your belt →

Still not sure? Call 020 8138 2848 and we’ll identify it for you.

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