Recently purchased a Schwinn Ascension 29" from Target dept. store. The price was ok and from what I read the main concerns/complaints most had were watch for the assembly of bike. Not being a bicycle mechanic but a mechanic of sorts I tried to insure assembly looked good which it did. Shifted good in all gears, forks not backwards, tires centered, hardware tight, etc. I have now owned the bike for two months and all was great. Starting out mostly on paved/gravel paths, and light trails. Decided to step it up a bit and started riding a bit rougher trails but mostly intermediate. While climbing a trail with minor to moderate roots bike would pedal but no transfer of power to wheel. Turns out threads on the hub actually stripped out! Took it to LBS and they ordered me a cassette wheel with new cassette. Also told me different bikes manufactured for big box stores. My question is other than maybe front rim and spokes a bit cheaper should I now be worried about other problems arising because of big box store model. All else seems to work good shimamo retailers, front suspension, ect. Don't mind spending the money on new rear but really don't have cash for brand new bike. Any insight would be greatly appreciated! Really do like the bike overall. Thanks