Zoom Adjustable Alloy Stem - 100mm
 
This stem has an A-Head style fitting. This is where the stem fits around the fork steerer.
 
A-Head stems are fitted to modern hybrid bikes, road bikes and mountain bikes.
 
The handlebar clamp size is 31.8mm. Most handlebars on modern bikes are this size but it is easy to check as the only other common size used is 25.4mm so there is quite a big difference. Also, the majority of alloy bars have their size etched on them.
 
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