The loading of the wheel does not change, the spindle pulls the wheel onto the hub so it is in compression, the nut would be doing the same.
There are a few ways to lock the nut but it will not need it unless you reverse the bike alot
I would not offer the service to anyone else, but I dont mind taking the risk myself. I have faith in my mechanical ability to assess whether something is safe or not.

MartinArcher wrote:The loading of the wheel does not change, the spindle pulls the wheel onto the hub so it is in compression, the nut would be doing the same.
There are a few ways to lock the nut but it will not need it unless you reverse the bike alot
I would not offer the service to anyone else, but I dont mind taking the risk myself. I have faith in my mechanical ability to assess whether something is safe or not.

the load of the wheel is on the axel, and as you say the bolt or nut is just hold the wheel in its place, you could always put lock wire around one of the spokes and then into a small hole on the nut if your worried, but as you say with thereverse thread and wheel rotation it will be fine, do ducatis have the locking function?

id still like this mod doing, but i would want to have it done on an RS250 Axel can see point on a weighty NC30 Mild Steel one.

Well, our man is not happy to do it on road bikes. So, you;re needing someone else to sort it I;m afraid.

I did some calcs on an M42x2 thread, and I could run a hub through Mechanica for an idea of the loads but I just dont think this is going to happen as a group buy - watch this space though!

i know somebody that does non destructive testing,

and he owes me a few favours, so if i could get a hub, and nut i could ask for him to test for loading etc?

Well, since I seem to have been the instigator of this somewhat long thread, I thought I'd give everyone an update on my progress. The bike has now done a few days of road riding and a track day at Cadwell Park. So far so good. Nothing's fallen off or shown any signs of cracking. But, then, I didn't really expect any.

As you can see, I've made three changes to the rear axle: New wheel nut, cush drive conversion, and brake caliper/disc conversion. This resulted in a total savings in unsprung weight of 1190 grams. Fairly substantial.

I've put a detailed post up in my blog here: http://www.3upracing.co.uk/blogs, and here is a quick shot of the completed rear axle:

2moto wrote:Well, since I seem to have been the instigator of this somewhat long thread, I thought I'd give everyone an update on my progress. The bike has now done a few days of road riding and a track day at Cadwell Park. So far so good. Nothing's fallen off or shown any signs of cracking. But, then, I didn't really expect any.

As you can see, I've made three changes to the rear axle: New wheel nut, cush drive conversion, and brake caliper/disc conversion. This resulted in a total savings in unsprung weight of 1190 grams. Fairly substantial.

I've put a detailed post up in my blog here: http://www.3upracing.co.uk/blogs, and here is a quick shot of the completed rear axle:

That's looking nice mate
Is your bike an nc30 or 35?
As I can c u have fitted an isr rear brake caliper an I was wondering if u have drilled our wing arm for the bracket if it's an nc35
Thanks alex

Going by those pipes i doubt thats either a 30 or 35

FWIW that rear axle setup looks identical to the RS250 axle i intend on fitting to my 35 so i dont think your going to have any issues stregth wise, The RS axle is alloy too so weaker i guess.

I want that rear caliper conversion, very nice

Drunkn Munky wrote:Going by those pipes i doubt thats either a 30 or 35

FWIW that rear axle setup looks identical to the RS250 axle i intend on fitting to my 35 so i dont think your going to have any issues stregth wise, The RS axle is alloy too so weaker i guess.

I want that rear caliper conversion, very nice

I have an isr rear caliper conversion going on my nc35 but waiting to get his hollow axel 1st so I can change everything at once lol

DM, the pictured axle is a stock steel axle, I'm pretty sure (it looks like steel).
You really should treat youself to the ISR rear brake, I got one on my racer and it's been worth all the hassle and fabrication time.., it really gives the rebound an easier time.

Ronni