Rear Mech Hanger Failure

[ramses]

Hi all,
On Saturday my rear mech hanger snapped, resulting in a ver mangled 105 rear mech and a damaged Carbon frame. Thankfully all under warranty, as the bike is only 5 months old. I personally have never experienced this kind of failure before. I am wondering if it is me that has damaged it, via my cycling. I do like a sprint these days, and from a rolling speed of about 22mph I can accelerate quite rapidly to 35+ mph, probably reach 40 at max. I hear about Cavendish having parts reinIforced as he hits 50mph. I ride a Pinarello RoKH, but am wondering, do I need to get a stronger hanger put the bike when I get it replaced? Or am I just unlucky?

 

[screenman]

Your sprint speeds are not that mighty so I would not think you would need anything different to standard.

 

[fossyant]

No, because the mech etc takes no power through it - it just guides the gears. Power is transmitted py the cranks to the rear cassette - the mech sits 'after' the power.

The ROKH is a pretty damn bomb proof bike. You haven't dropped or banged it ?

 

[ramses]

Hi, thanks for the feedback, I didn't think it would be sprinting, but just wanted to be sure. The bike is my baby,it gets treated like royalty, so no it hasn't been dropped or knocked. I guess my initial assumption is correct, just unlucky. Hope to hear today what the course of action is going to be.

 

[VamP]

A lot of broken mechs are down to grass or other crap getting wrapped around the mech - any chance of that happening? If not I guess you're in the clear for a warranty claim. Good luck.

And echoing above, it's definitely not the sprinting...

 

[postman]

I knocked mine last week,i fell off waiting to allow a motorist to pass.She was so surprised i think she stalled and i lost balance and crashed to the ground.On checking no real damage done.So i hope you get it sorted soon.I also know what you mean about the bike being well looked after.You could eat your dinner off mine.

 

[ramses]

No muck or grass caught up, In fact I had only cleaned the chain cassette and mech last weekend, re-oiled and aligned gears ready for our club time trials on a Thursday. The bike was excellent at the time trial, and was ok most of Saturday morning. I think it must have been bad luck, maybe faulty from manufacturing. The bike is only 5 months old. At no point has it been knocked, and as far as I know, nothing caught or hit, or at least not that I have noticed or seen, and I think I would have.