Goldix R180 ultra hubs

[CycOps]

Hi all, does someone has build or is running a wheel set with Goldix R180 ultra hubs? They come at about 218 grams a pair with HG freehub body and CL disc mount. I know they're limited to 75kg total weight but that's good for me. Are there any flaws?

[DrDanger]

I built up a pair of climbing wheels with them and the Lightbicycle AR25+ rims and some skinny lightweight carbon spokes. I’ve only have ridden about 200 miles on them so far, so early days. I’m pushing the weight limit on these at 77 KG plus the weight of my bike at 5.8 KG. Despite that they have worked well. I’ve done some high speed descents without developing wobbles of vibrations. The thin carbon spokes handle the cross winds much better aw well.

[Pedaldancer]

Hi all, does someone has build or is running a wheel set with Goldix R180 ultra hubs? They come at about 218 grams a pair with HG freehub body and CL disc mount. I know they're limited to 75kg total weight but that's good for me. Are there any flaws?

The 75kg is somehow new.. when I bought them this was definitely not in the spec.
Unfortunately I can't tell you about their reliability...i didn't build them until now.
I am far below 75kg but that tells that this hubs are less strong as Goldix engineers thought they would be.

[CycOps]

Thanks for your answers.

@Pedaldancer That's interesting, when did you buy yours, so how long ago is it they were sold without weight limit?

@DrDanger Which spokes did you choose and what it the total weight of your set?

[DrDanger]

I used spokes from AliExpress Carbon Spoke Hub store, their thinnest which weigh 1.8 grams. The complete wheel set came in at 805 grams

[CycOps]

The complete wheel set came in at 805 grams

805 grams only, that's impressive!
What rims did you use?

[DrDanger]

Lightbicycle’s AR25 at 240 grams each

[Pedaldancer]

Thanks for your answers.

@Pedaldancer That's interesting, when did you buy yours, so how long ago is it they were sold without weight limit?

@DrDanger Which spokes did you choose and what it the total weight of your set?

Roughly one year ago, if I remember correctly. Maybe they had issues with hub damages for heavy riders. I wouldn't be too surprised. I have seen this also for some rims. In the beginning no limit and then a limit magically appeared.
 
I didn't build a wheelset so far with these hubs. Shame on me. I had other hubs in the queue and just buying carbon rims for fun of building is a bit too pricey. 

[RDY]

I'd be very wary of a hub claiming 75kg max, even if I was 20kg below that.  That's not normal.  Avoid.

[Pedaldancer]

I'd be very wary of a hub claiming 75kg max, even if I was 20kg below that.  That's not normal.  Avoid.

So for rims this is also sometimes set, e.g. 90kg
Would you be worried if in that case you are at 70kg?

That's rubbish.
What does the limit tell? It tells that the 100kg rider shall not buy the lightest stuff and expect it to work perfectly fine.  Weirdly, that's what they do so often.  "I must buy the lightest stuff,because I am so heavy already". I don't get that logic. These riders must buy the stuff that can survive their power output , which probably is much higher than for a flyweight rider.
Why should a 50kg rider need to have material that was designed for 120kg?

[adam900710]

So for rims this is also sometimes set, e.g. 90kg
Would you be worried if in that case you are at 70kg?

That's rubbish.
What does the limit tell? It tells that the 100kg rider shall not buy the lightest stuff and expect it to work perfectly fine.  Weirdly, that's what they do so often.  "I must buy the lightest stuff,because I am so heavy already". I don't get that logic. These riders must buy the stuff that can survive their power output , which probably is much higher than for a flyweight rider.
Why should a 50kg rider need to have material that was designed for 120kg?

I'm more interested in how those manufactures determine the weight limit.
Base on failure report? Or real proper stress analysis?

If just based on failure reports, it can be QA problems (or the next possibility) and you won't know if you're lucky enough to hit a bad batch.
Weight limit will reduce the chance, but you're still unsafe even under the limit.
And in that case there should be a recall, but everyone knows there will be no such thing for some random Chinese components that are only mostly targeted for domestic market.

If it's proper stress analysis, then it should be there from the beginning. Adding a limit later means there is very thin design margin.
In that case a weight limit will definitely help, and a lighter rider has nothing to worry.

But are you sure which case it is?

[CycOps]

Not all sellers state the weight limit, but this seems to be the official Goldix store:

https://de.aliexpress.com/item/1005008958920545.html?gatewayAdapt=glo2deu

"Special reminder: This model is for road bikes only! It cannot be used on gravel roads or mountain bikes. The rider and bike weight limit is 75KG. If you exceed this limit, please use one of our other models!"

I'll pop them an email and ask. Let's see if I'll get an answer.

[Pedaldancer]

I'm more interested in how those manufactures determine the weight limit.
Base on failure report? Or real proper stress analysis?

If just based on failure reports, it can be QA problems (or the next possibility) and you won't know if you're lucky enough to hit a bad batch.
Weight limit will reduce the chance, but you're still unsafe even under the limit.
And in that case there should be a recall, but everyone knows there will be no such thing for some random Chinese components that are only mostly targeted for domestic market.

If it's proper stress analysis, then it should be there from the beginning. Adding a limit later means there is very thin design margin.
In that case a weight limit will definitely help, and a lighter rider has nothing to worry.

But are you sure which case it is?

Adam you seem to be much smarter than bike companies...
How would you do it?

Rims are limited by weight , no matter how strong the rider is.. no matter how the riding style is in detail.. also in road biking you can be a smooth rider or a pothole collector..
Complete bikes are limited by just pure weight value. Although it gets even more complicated then. The allowed spacer stack above the headset is just limited by height... no word about the weight on the handlebars nor the stem length, which would create the real torques on the steering area...
Light titanium pedals are limited just by.. guess? Weight. There's no such thing like "maximum allowed torque of xxx Nm"

.... what you demand to be served from Goldix is something no bike company does.
So.. how would you overcome this ? Creating a personal load collective for each and every cyclist? How would you do that? Based on what?

[TidyDinosaur]

The wheelset I built myself out of 360gr 50x32 rims, Alpine spokes and Goldix R180 Ultra hubs. Total weight of the wheels is 1140gr. I now have about 1600km on them without problems. I'm about 70kg in the nude.

[CycOps]

The wheelset I built myself out of 360gr 50x32 rims, Alpine spokes and Goldix R180 Ultra hubs. Total weight of the wheels is 1140gr. I now have about 1600km on them without problems. I'm about 70kg in the nude.

Thank you for contributing.
So you would deem the R180 ultra  reliable hubs?
If you search the internet, there are a lot of allegedly cons to be found: a lack of stiffness of the hub body, very small bearings with a short life span, and the risk of ratchet teeth shearing off.