17 inch motorcycle rim with bicycle hub

[chronosgarage]

I’m building a reverse trike. I want to lace the 36 hole bicycle hub with a motorcycle rim. The plan is to use bicycle spokes for the rim. I know from searching this forum that i need to have some spacer to get the nipples to seat properly in the motorcycle rim. But I can’t find info on the length of the bicycle spokes used for this rim combination.


Can anyone have any information about the correct length of spoke used?
Any help is appreciated
Thank you

 

[amberwolf]

The length is different for every hub and rim combination, so you will have to measure some things on the rim you are actually using, and some things on the hubs you are actually using, and then do calculations or use a spoke calculator. If you don't have the hubs and rims yet, you need those first.

Many spoke calculators, like this one
https://ebikes.ca/tools/spoke-calc.html
do some explaining on what exactly you need to measure and how, and then where to put that info into the calculator, to determine your spoke lengths. THere are a number of them out there
https://www.google.com/search?q=spoke+calculator
as well as explanations of measuring rim ERD (which is the most important thing, usually)
https://www.google.com/search?newwindow=1&q=meausuring+rim+erd
one specific to MC rims
https://www.motorcycleforum.com/threads/aluminum-rim-measuring-erd.231916/
(there are others).

If you are using these for disc brakes, those are often laced assymetrically (just as rear wheels with sprocket clusters usually are), so you'll need to make sure the calculator is adjusted for that so your wheel is still centered over the hub's "OLD" spacing, and not offset to one side or the other.

 

[chronosgarage]

Thank you so much for your reply. I finally able to choose the correct spoke length using spoke length calculator.