The pieces most likely to come in contact with the ground and other obstacles benefit from the durability, mainly the forks, down tube, and chainstays. If you need to save some money, stick with Chromoly on your bottom pieces. You get a durable frame without adding an impossible weight.

It’s helpful to look at the percentage of Chromoly used in the bike you’ve got on your mind, or if you’re narrowing down bikes in your price point, go with the ones with a higher Chromoly percentage. Pretty much all high-end BMX bicycles use Chromoly frames, forks, bars and have the strongest bike chain as well. In the past, aluminum or carbon bikes were all the rage, but Chromoly is a relatively new alloy that manages to blend the durability of BMX frames with the lightweight of a racing bike. If you’re going pro, the first thing you’ll look for is Chromoly. If you don’t have fully welded joints or heavy-duty rims, your bike is going to collapse the very first time you land a jump. Pro BMX bikes come with high-end parts and are fully sealed and welded to give the frame support.

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