Dan here again.......steel hangers are an option, but let me pose this.....if the hanger doesn't give, something else will. That could be the destruction of a Di2 rear derailleur or even worse, the expensive carbon frame everything is attached to. 7075 AL is also an option, but as they tend to be more brittle than 6061 AL, bending them back in the event of bike tipping over or slight topple when riding will be tough, they will simply break off. We've discussed stainless steel as well, and while stronger than 6061, the difficulty machining them on a mass scale would create a very expensive part.
Let me ask this? How much would you, as a consumer, be willing to spend for peace of mind at the rear derailleur attachment point? You drive the market, drive the demand and we'll work on producing!
As always, we appreciate the feedback!
We had one in a shop (many many moons ago) that snapped before the bike had even been ridden. It'd been on the shop floor for ages and everyone playing with the gears had eventually fatigued the hanger.
Geoff wrote:Yeah, and they guard them jealously! I keep asking for a steel hanger, but they don't have enough to go around, so they take them off before giving me my bike and keep using the steel hangers year after year.
With your connections Geoff, I'm surprised!
They'll also remove them from the broken carbon frames and put them onto the new ones!
some other hangers have a very slim shape when viewed from the side, then get thicker off the back of the frame to possibly better support the derailleur. but right at the transition, there is a hole for a screw and barely any hanger material left around it. any force creases the hanger right at the hole.
And a LOT of hangers are mounted on dropouts that AREN'T FLAT AND SQUARE. Then you tighten your QR and the whole derailleur tilts to the left, requiring an alignment of a brand new hanger. Too bad it's the type described above and bends at an unintended failure point.
WheelsMfg made some limited edition titanium hangers for Cervelos a little while ago. unfortunately, they never made them for their most current hanger shape.
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I think it's a terrible idea to integrate these things onto the frame. They basically have to replace the whole frame just for the hanger.
i had a Cannondale SuperSix HM, no issue.
i have a LTK since few days, no issue
i have the Di2 on a 29er too:
i have a Flash 29er, no issue, but here i did a custom hanger, longer and with some mm of backwards, so very stiff, although is made of 7075 alu
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