Joako

Hello,

I am going to build a new wheel with a 2x. However, I have been looking in the forum and google and did not find how to lace a wheel with 2x. Could anyone please provide any details in lacing a 36h rim 2x? Thanks in advance.

Retro Grouch 

What's the point?

I'll confess to never having built a 36 hole rim 2x. If I was, however, I'd just start with my first spoke a little closer to the label on the hub.

BeretCyclist

I'd google it...under images there has to be something...I know i've ran across wheel building sites as well.

BikeWise1

No reason to build 36H 2 cross. But if you must, it is exactly the same as 3x, but with one fewer cross! That may sound obvious, but if your spoke length is correct, you won't be able to do anything other than 2 cross and have it work.

Couldn't find anything online? Really? Let me help!

rs1101

https://www.astounding.org.uk/ian/wheel/patterns.html

dabac

Have a look at a 3X wheel. Notice how spokes appear in pairs that runs pretty much parallell( one heads-out, one heads-in) For a 3X lace there will be 6 holes in the flange between these "paired" spokes and for a 2X ther should be 4 holes in the flange between these "paired" spokes. Out by the rim the sequence is exactly the same for both 3X and 2X.

carpediemracing 

With cross patterns, you can lace a wheel up a quarter at a time. One side with spoke head on the outside of the flange, then the other side with the spokes dropping in the same way (head out).

Then you drop spokes so the spoke heads are inboard. When doing the crosses, you should do the following:

If n = number of crosses...

Over n-1, under 1.

For 3 cross, you go over 2, under 1.
For 2 cross, over 1, under 1.
For 4 cross, over 3, under 1.

As pointed out before, you need different length spokes for the different crosses (unless you also change hub or rim in a way that allows you to use the same length spoke).

To calculate spoke length, you can use this:
https://www.sheldonbrown.com/rinard/spocalc.htm
(You need Excel and also need to know what you have but don't need to measure much)

If you don't mind measuring (rims are a pain if you don't know what you have), go here:
https://www.bikeschool.com/spokes/

hope this helps,
cdr

Joako

Thanks dabac and carpediemracing. I have built wheels before, but only 3x and radial, and could not find any specific details for 2x. The point for this build is that I am using 406 rims with a large diameter flange (igh), therefore a 3x is overdoing it.

AEO

the times a spoke crosses, is exactly the amount a hole moves over.

tatfiend 

To the poster who asked why do 2x.

Rohloff specifies 2X for larger diameter wheels and 1X for smaller ones due to the design of their hub where there are bosses on one spoke flange for bolts that hold things together. So does NuVinci for their hub which is almost 6" in diameter at the spoke holes in the flanges.

Very little difference in strength between 2x, 3x, and 4x wheel construction per Jobst Brandt and 2x should save a few grams of weight.

AEO

the tangent at which the spokes go out from the flange to the rim become more extreme as the ERD decreases and flange diameter increases.

for a 32h 406mm rim 2x is normal for low flange hubs.
2x @406mm goes out at nearly the same angle as a 3x @622mm rim does with the same hub.

smiller

i tend to like funky wheels so i laced up my 36 hole chorus hub 2x on the non drive side and crow's foot on the drive side to an asymetrical rim. took 3 tries. had to stop and go have a couple of beers and try the next day, but it wound up great and is strong and true.

operator

Yeah because you're clearly racing if your hub requires 2x lacing, a. la large flange hubs like the rohloff or nuvinci right. Those hubs are SUPER light!