my first reaction was two things:

1.) i agree with bill and peter that 60psi is high. i usually go no higher 
than 40 on compass rat traps (measure 50mm), and they need a bit more 
pressure because the sidewalls are supple
2.) for stiffer / tires with wirebead, i go lower pressure. i blew off the 
tube and sidewall of some 650bx42 pasela wirebeads, with 40psi front 
(generally what I inflate Hetres to). i'm a 155lb rider
3.) could also be changing pressure from changing temperature

On Friday, January 13, 2017 at 9:10:24 AM UTC-5, Kevin Lindsey wrote:
> So I inflated the 50mm Schwalbe Marathons on my Hunq to 60 psi (rear) and 
> 40 psi (front) last night and wheeled it into the kitchen in preparation 
> for what would have been my morning commute.  About twenty minutes later, 
> there was a deafening "bang" from the kitchen; I honestly thought a handgun 
> had gone off or something had detonated in the microwave, and my left ear 
> was ringing for a half hour afterward.  Long story short, the Schwalbe 
> inner tube on my rear tire had popped, shredded, and actually blew the tire 
> off the rim; anyone who uses Marathons knows how hard it is to get those 
> things on the rim in the first place, and it's sobering to think of how 
> much energy must have been released to unseat one.  Fortunately, aside from 
> screwing up my commute and throwing my dogs' digestive systems into 
> reverse, however, there was no other apparent damage.
> Anyone know generally what causes a tube to blow up like that?  It wasn't 
> over-inflated, probably only had fifty or sixty miles on it, was the 
> correct size for the tire, and generally should have lasted for several 
> hundred miles.  My son has had this problem with some Specialized tubes 
> recently, but the Schwalbe products are generally of a higher quality, but 
> now I'm wondering whether there's a QC issue at the factories in, I assume, 
> China.  
> Any thoughts would be appreciated.
> Kevin

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