Radial lacing Cromotor V3 in 20" x 41/4 Rim

[VicViPER]

Hi All!
Cromotor V3 in CoastCycles Rim 20" x 41/4.
2 spokes broken, I want to do radial lacing now.
Do you still suggest it for this big hub and which spokes/nipples are the best for this configuration?
Can I use 80-85 mm spokes? (I measured 70 mm from hub hole to top nipple).

Thanks a lot
Regards
Vic

 

[markz]

Radial could be weaker, but I've never seen spokes bent quite like that before.

Look into getting a motorcycle/moped rim with angled nipple holes.
CoastCycles Rim 20" x 4.25" is perhaps a 16" motorcycle/moped rim, which are out there.
Nipple holes in rim will be larger then the bicycle spokes, washers that are cupped.
https://www.electricbike.com/moped-rims-tires-hubmotors/


https://bicycles.stackexchange.com/questions/8432/is-it-really-necessary-to-physically-cross-interlace-the-spokes-on-traditional

Probably the best source for answering this is Jobst Brandt's The Bicycle Wheel, the definitive text on the wire-spoked wheel and an essential for anyone interested in the art of wheelbuilding. Excerpted from page 68 of the 3rd edition:

Spokes in a crossed pattern are usually interlaced at their last crossing before reaching the rim. Spokes coming from between the flanges are laid over those from outside the flanges. Interlaced spokes take up each other's slack during severe radial loading and reduce the chance of spokes becoming loose. If spokes become loose, their nipples can unscrew. Radial spokes cannot be interlaced and therefore, lose alignment from road shock more easily. Interlacing also gives more clearance between the spokes and the derailleur on rear wheels.

 

[VicViPER]

Thx markz!