Bicycle Mechanics - 28 spoke patters?

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.



PDA

View Full Version : 28 spoke patters?

crazzywolfie
06-05-10, 12:20 AM
i'm trying to find a unique pattern for a 28 spoke rim. i have been searching on Google with not too much luck. i am planning on rebuilding my bike trailer and i want it to be unique because thats the type of person i am. this is the only one i know i could use but i don't know how strong it would be.
http://www.instructables.com/files/deriv/FA4/N3YL/FPQLK1D8/FA4N3YLFPQLK1D8.MEDIUM.jpg

dabac
06-05-10, 07:34 AM
all leading/all trailing CAN be done, but it puts a lot of torque on the hub spindle, even to the point where it can distort and fail.

I've posted a pic of a hub that failed like that in an earlier thread.

Thick hub and low cross number together with an understanding that durability is likely to suffer is recommended.

If you want to go special on a 28 - use a 36H hub. Might be possible to lace 3 holes crow foot-one empty-4 holes regular cross-one empty-3 holes crow foot.

Half leading/half trailing should be doable as well.
FBinNY
06-05-10, 08:00 AM
The only way you could build that is to have the opposite flange wound the other way, otherwise the hub would simply rotate until it was radial. If you were to build with with all the spokes to the right on one flange and to the left on the other, the resulting torque across the barrel of the hub will be staggering and the flanges will twist destroying the hub.

BTW- your choices for exotic patterns are more limited with a 28 spokes because that's 14 per flange and divisible only by 2 and seven. If you were to use 24 or 36 spokes with 12 or 18 per flange, both of which are divisible by 2 or 3, a whole new dimension of possibilities would open up. I'm not debating the merits because I understand that you're looking for cool factor more than functionality.

I just looked at the picture again, and noticed that you have 28 holes on one flange, that means it's a 56 spoke rim, and opens up other possibilities such as having 6 spokes in one direction and 1 (preferably of heavier gauge) in the other. Not necessarily sound, but it would probably hold up for a trailer, and make a decent conversation piece.