I'm 90kg (198pounds) and I have a 27.5 hard tail mtb 9 speed freewheel and it is quick release. I only use my mtb as a commuter on roads and never on trail. I run my tires at 35-40psi.
Ever since i bought the bike, the stock axle lasted about 1000-1500 kilometers before my rear wheel started rubbing against my frame. I got it checked out and replaced at my local bike shop cus it was indeed a bent axle. After they had replaced it and replaced my bearings, it only lasted 200km befofe it got bent again. I went back had them replace it with a new one again and same thing happened, only lasted 200km. I tried getting it replaced at another bike shop near me and this time it ony lasted 100km before it got bent.
Is this because of my weight? Or because my tires are too hard? Or are freewheels just prone to bent axles especially when you have more gears?
I have read somewhere that the greater the speed (7-9speed) the more it is prone to having a bent axle if it is using a freewheel.
I do plan on upgrading to a cassette type hub. I just fear that i may still bend my rear axle even after upgrading my hubs. That's why I want to know if there are other factors causing my axle to bend and will it it still occur if I upgrade to a cassette type hub due to my weight or tire pressure (if those are factors causing or contributing to a bent axle)
Sorry for the long post. Thanks in advance of your answers.