Spoke thread sizes?

[Northern Irelander]

I am looking to respoke the hub from 16" wheel to 26" using stainless 1.8mm spokes or 2mm standard.

Does anyone know the usual thread sizes, are they metric, British Imperial or American sizes?

I know there are spoke kits out there, but I have all the spokes and can get a die and thread the spokes for tinkering

 

[Andrew harvey]

Spokes are rolled on to spokes not cut, as cutting them weakens the spokes. Most good bike shops keep a range of spokes in stock, you just have to calculate the length you want.

 

[Northern Irelander]

Thanks

After doing much trawling and checking various wheels with thread gauge, the thread pitch appears to be 0.45mm (56tpi)

I can see the logic behind rolling, however on close inspection x20 magnification, rolled threads are far from perfect, in comparison to cut threads.

Are thread on nipples cut? I couldn't source any info on these.

Does the rolled spoke thread even 'mate' properly into a nipple thread.

The strength of a spoke/nipple all depends on how good the person/machine is at rolling the spokes, how they were offered up to the nipple on assembly, torque sequence/phase applied across the wheel on assembly, plus tolerances (far from perfect) between spoke and hub/rim hole.

On the standard 36 hole wheel, there is no reason why threaded material (if done with precision) should be in any way inferior to rolled material.

Plus split dies allow for slight adjustment of material removed.

It seems things continue as they were by convention and a reluctance for change, unless you are NASA of course, metric/imperial it's all the same

 

[daniel.weck]

Brompton to full-size conversion ?
What hub motor is this ?
I'm waiting for parts (spokes + nipples ordered from Taiwan, battery from China and rims from the UK) and then I will lace 2x 16" wheels with my Bafang and Tongxin motors. I will however be tempted to lace the Tongxin into a 26" wheel, later on.
I'd be interested to know what your project is
Cheers, Dan

 

[Northern Irelander]

hello

I have some other thread topics (pardon the pun) in the other sections, that give some more detail, but briefly, 16" conversion is from a Powacycle unit to a standard 26" rim.

I have looked at the spoke length calculators, but I'm none the wiser as my hubs dont seem to be listed.

Spoke lengths can be calculated from 1st principles of Trig, will dig out my old maths books.

I purchased a spare rear MTB wheel (extra expense but I'm short on time and want to get the project finished asap), this will accomodate the e hub
From this the rear standard hub will be fitted to the 16" as a standard pedal bike.

I have kept the original MTB wheels intact as it's being used as a daily commute 28miles round trip, giving me time to convert the spare wheel and source parts and check balance of the newly built wheel.

 

[daniel.weck]

I've used Spocalc with my own hub measurements in order to figure out the spoke lengths. The hardest part was finding the ERD (Effective Rim Diameter) of rims that I don't own yet

hello

I have some other thread topics, that give some more detail, but briefly, 16" conversion is from a Powercycle unit to a standard 26" rim.

I have looked at the spoke length calculators, but I'm none the wiser as my hubs dont seem to be listed.

Spoke lengths can be calculated from 1st principles of Trig, will dig out my old maths books.

I purchased a spare rear MTB wheel, which will accomodate the e hub, think rear is best. From this the rear standard hub will be fitted to the 16" as a standard pedal bike.

I have kept the original MTB wheels intact as it's being used as a daily commute 28miles round trip, giving me time to convert the spare wheel and source parts and check balance of the newly built wheel.