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how much do the upright weighs, is the weight saving worth all the work?
The original Triumph ones weigh a fair bit!! more than I was expecting when I took them off, Maybe around 5kg but someone else will probably have better info.
Estimated for the one above was around 1kg
And it’s a reduction of unsprung mass which more effective
I reckon its nearer 2-3 kgs. Got a pair on the bench now. Will try and weight them
For a alloy version, i wouldnt even consider it unless you can get an FEA analysis on it first. Certainly not if you sell them.
Id be surprised if there is enough money it though.
Maybe, I’m not amazing at guessing weights but around that seems about right. That including hub and stub axle? I can weigh those separately as I have my old set but I’d say it would add another kilo per side. Just looked it up and the iron Escort hubs weigh 2.25kg and the alloy ones weigh 1.4kg, so I’d assume that the iron Dolomite hubs weigh about the same. So a 40% weight saving there, maybe another 30-40% with alloy uprights, will definitely have an affect on the handling.
I’ve done some FEA on them, but I keep changing the design to suit manufacturability so I haven’t done one in a bit. I also need to work out what parameters I need to build to, like what kind of forces will be acting on them in worst case scenario (full bump etc.). I might get ahold of a spare hub to see what kind of load it would break at and design to that parameter. I think firstly, I’m going to 3D print one to check fitment and clearance.
Yes, I dont think it’s a smart venture commercially, which is why I was only really looking at them for myself and if anyone wants a set, I could provide the parts but maybe get someone else to weld them properly.