120mm BF Wheels For Backfire Zealot S2, S3, X and X2

The wheels were great at rolling over sidewalk cracks, bad roads, and other obstacles but quality control was not good. The urethane itself was off center with the wheel hub. This resulted in a noticeable vibration at around 20mph, even on smooth pavement. This caused my feet to go numb short into the ride. All 4 wheels were tested by spinning them on a truck (axles were straight) without the pulley attached. 3 of the 4 did wobble but less noticeably. The 4th one was especially bad. Thought it was the bearings but the wobble continued with a new set. The bearings were pressed in using both the traditional method of using the truck hanger and a dedicated bearing press tool. Neither helped. The included pulley and pulley was well made and pressed well. Just wished the wheels were the same as they were great at low speed. Only rode them for about 9 miles before swapping with Otang Dad Bods which gave a much smoother experience.

They sent a bad bearing and then tried to make me jump through unreasonably hoops instead on just sending a new bearing. I bought and x2 and 2 sets of wheels and this is the customer service I get. I do not recommend anyone do business with backfire. Their name says it all.

Great customer service