Searching for a derailleur hanger for a Gen3 Stride

[Cloud Pine]

I've been getting great use out of my Gen3 Stride over the past few years. But I've now worn out the derailleur hanger. It doesn't manage to hold the axles steady enough anymore. So when the hub motor activates the axle is thrown out of the slot in the hanger.

It seems the company Gens 3 was something of a flash in the pan and has now disappeared. So I'm at a loss for where I might find a replacement part.

I've scanned countless hangers on various websites including Chinese ones where the part originated. But to no avail. I can't seem to find a match. See the picture attached.

Might anyone have any ideas of where I can find a new hanger for this bike?

Thanks for the help!

 

[HumanPerson]

this work?

https://www.aventon.com/products/av...ough-derailleur-hanger?variant=19144057258073

 

[HumanPerson]

some of these look like yours,

https://www.ebay.ca/sch/i.html?_nkw...pe=e&msclkid=8b886bfcfb1918642d090d39fc45fec1

 

[Cloud Pine]

Thanks for the suggestion.

But not quite. As you can see in the photo above, the one that I need to replace has a single attachment point and a fully rounded shape.

 

[Cloud Pine]

some of these look like yours,

https://www.ebay.ca/sch/i.html?_nkw...pe=e&msclkid=8b886bfcfb1918642d090d39fc45fec1

So many hangers... Feels like I'm playing a game of spot of the differences.

Still can't find a match. It's hard to imagine that the company which was essentially just putting a bike together out of already available Chinese parts came up with a novel design for a hanger.

Hoping someone out here has a scrapped Gen 3 Stride with the part still on it.

 

[Annieolnie]

Apparently Google Lens cannot play "which of these things is not like the other." I just dropped your picture of a hanger into it and got back pure rubbish. Aliexpress has hundreds of pictures, nothing comes up for your bike name but it really looks like an Orbea which is also what some of the Haibikes and Izips use. Aliexpress has them so cheaply you could try reshaping one a bit if needed. Orbea Carpe 2015 was the closest I found. I will post a pic.

 

[Cloud Pine]

Apparently Google Lens cannot play "which of these things is not like the other." I just dropped your picture of a hanger into it and got back pure rubbish. Aliexpress has hundreds of pictures, nothing comes up for your bike name but it really looks like an Orbea which is also what some of the Haibikes and Izips use. Aliexpress has them so cheaply you could try reshaping one a bit if needed. Orbea Carpe 2015 was the closest I found. I will post a pic.View attachment 15791View attachment 15791

Hey thanks Annie.

Yes the aliexpress picture search is not too bad. Those hangers are pretty close to mine but the top isn't quite right and I'm afraid they wouldn't sit right in the frame's indent and would wiggle around, especially with the single point attachment.

Without that exact part, I'm now thinking my best bet is to modify the tabbed anti rotation washer which fits between the hanger and the axle nut by spot welding some extra steel to the tab so that it completely fills the indent in the hanger. Just a way to keep using my beloved but failing ebike.

 

[Annieolnie]

Since you've got some metal working skills, you would know better than I would, but couldn't you just take one of the " almost right " hangers and braise on some aluminum at the head and then just shape it with a dremel until you had a good fit? Hangers are very soft.

 

[Cloud Pine]

My welding skills are pretty basic and limited to steel. Aluminium welding is much trickier and unfortunately beyond my abilities.

I'll start by seeing if I can modify the steel washers to form a better fit where the aluminium has worn out the jaws of both the hanger and the frame. Hopefully this will stop the axle from bucking out of its widened slot.

The basic issue is that there is a huge amount of torque from the motor that needs to be contained by, like you said, quite soft aluminium. It's inevitable that this metal gets chewed up over time.

I'm feeling that the design philosophy passively inherited from regular biking of the 'sacrificial hanger' (to protect the derailleur) needs to be reviewed. Derailleurs be damned. Ebike hangers should be made out of tough steel not aluminum.

 

[Annieolnie]

Well, I wish you luck and if you get the chance post a pic of the repair.

 

[HumanPerson]

oh hey, maybe if you have a machine shop aroiund you, ya coulkd go there and ask if they could replicate, in steel, the one you have.

Prolly cost a bit more but you'll have a steel hanger

 

[Cloud Pine]

Update for the community.

Scrounging through online inventories finally paid off. I managed to identify the derailleur hanger that the Gen 3 Stride uses: a Chinese copy of a Pilo D900 hanger.

Now if I could only find how to order such a knock-off part from China, instead of waiting several weeks (and paying big bucks) to receive the fancy original from Europe.

 

[HumanPerson]

https://www.amazon.ca/D900-Derailleur-Hanger-Ville-Bikes/dp/B09PVJXMFR

 

[Annieolnie]

Wow, I'm amazed you found it at all. Time to get a PiloD900 tattoo. I think you may be stuck as to how you order it. Tree Fort Bikes does carry a lot of hangers including the Pilo brand. You could ask them if they could put one in their next shipment, that might save you something, otherwise it's in for a penny and in for a lot of pounds, but congrats on a difficult job.

 

[addertooth]

I would have been tempted to get a local weld shop to build back up that wallowed out face, then file it to dimensions.
But then, if you have the right equipment, you could already do that yourself. For some reason the part looks like steel, and not aluminum. Does a magnet stick to it even slightly?

 

[HumanPerson]

maybe does it really have vto to be the exact same one? lol

https://derailleurhanger.com/shop/

 

[danpenn]

Is it possible to stabilize the axle with a torque arm or two?

 

[Cloud Pine]

For those who might be curious, I did get a quote to have the hanger copied in steel from a machine shop.

Pretty much as I expected. $200-300. Yeah, no.

So now that I identified the model, I also called a couple of local bike shops to see if they might have the part. No luck. Pretty rare, maybe even discontinued.

Today I spent some time welding bigger tabs to the bike's anti-rotation washers (which are steel) for a better fit over the damaged jaws of the aluminium hanger (and the axle slot in the frame on the other side). I'll post some pics tomorrow when I install them. If they work as planned at least.

To cover all bases, I also ordered an original Pilo D900 from Lithuania via eBay. $50. 2-3 weeks of waiting. Let's just hope it is actually a match.

Fixing things feels even better than buying them.

 

[StoneTower]

Modern hangers are often made of aluminum so that if you catch the derailleur on something it bends the hanger and not the derailleur or the frame. I had a mangled hanger on the ebike I rebuilt and was thinking of making one out of steel until I found out that they are made to bend. I ended up making a tool to straighten the hanger out of 1" square tubing and a bolt. I later ordered a replacement for the hanger, but it came from AleExpress and had the wrong thread pitch for my through axle.

If you can find a hobbyist with a AC TIG welder (DC TIG will not work on aluminum), the damage on your existing hanger can built back up and the hanger can be machined (or filed) back into shape)

 

[Cloud Pine]

An update.

I finally fixed the problem. The bike is on the road again.

Worn aluminium unable to hold the axle anymore was the problem.

I first tried to braze aluminium onto the hanger and the frame. But the new material was simply not strong enough and would shear off under pressure immediately once the motor kicked in.

So I turned to steel. Which, in my opinion, should be favoured for holding ebike rear axles.

I ground out a piece of flat bar to match the hanger and tapped threads in the right spots. Super crude and certainly not pretty but ultimately effective. (I'm by no means a professional or even skilled amateur machinist as the photos below make clear.) I even added an extra tab to the hanger to further build up its ability to securely hold the axle.

On the right side of the frame, since the aluminium was also severely worn and since there was no hanger to modify to secure the axle any better, I needed another solution. The beefed up tabs on the anti-rotation washers did not do the trick against the damaged aluminium - the axles kept spinning. So I also ended up welding a whole steel bracket to the tabbed anti-rotation washer on the other side. I used a longer screw in the hole used to hold the fender bracket and drilled a new hole on the frame for a second attachment point.

Hope this helps others who might be dealing with similar issues.