When it comes to shopping for a new set of BMX cranks, it can be a little tricky deciding just what is right for you. Not only do BMX cranks come in multiple lengths, but they also come in three different spindle sizes; 19mm, 22mm and 24mm. Over the years, BMX has evolved and products have been refined over and over again to get to where they are these days. The quality has hit a level that has made it easy to trust that you’re going to be able to put your bike through some heavy riding and it’s going to withstand the abuse. At least this is true if you’re going with a reputable brand and not going with the cheapest option available. Now, there’s probably a lot of newer riders out there that are looking to upgrade their cranks on their bike. The question of “what size BMX cranks do I need?” has probably crossed your mind many times just looking at the options. So, we’ve put together a BMX crank size guide to help you figure out just what is right for you.