Its 44mm zero stack headset cup standard top and bottom, you can put a tapered steerer fork in with the correct EC44 lower headset cup. Same as most major brands are doing for their frames. EVERY RSD for example is a 44mm zero stack cup head tube and they sell them with a cane creek 40 series ZS44/EC44 cup headset. So although it is intriguing that Walmart wants to sells a quality mountain bike, my question is will people actually buy such a buy from Walmart. I mean Walmart generally has the stigma of cheap, low quality goods for a certain demographic. Maybe sale of higher quality good through the e-commerce website has a different stigma/expectation. I currently own a foldable ebike that is too difficult to peddle when the battery dies. Are you able to peddle this bike when not using power without too much of a struggle. Any tips are appreciated because I just pulled the trigger and purchased it as a Thanksgiving day birthday gift. Keep in mind that we may receive commissions when you click and make purchases. However, this does not impact our reviews and comparisons. We try our best to keep things fair and balanced, in order to help you make the best choice for you.