qino88

I had to change my hub and i uses the same spokes and nipples i got which were good before i removed them. When i lace 3 cross pattern, the spokes seem too long. I have a photo of before and pretty sure it was 3 cross before too. I think i am making a mistake when lacing. But what mistake could cause the spokes to remain too long even though they are the correct length?

Duragrouch

Just grasping at spokes, I mean straws... The spokes where they cross, close to the hub they just pass each other, but at one of the crosses further out they are "laced", i.e., they actually press against each other (which helps keep the wheel in true), check that is the case, because if not, the spokes have a tiny bit more direct path to the rim so might seem too long.

Bill Kapaun

What size wheel, how many spokes and how much too long?
For more typical wheels, 5-7mm would indicate you only did cross 2.

qino88

They do press against each other once and i think it looks quite the same of the video i watched. When i look at the before photo of my wheel i see that spokes in the same side of hub which is in opposite directions(some come from inside of the hub some outside) the ones which comes from inside of the hub almost goes over the other. But when i lace there is a one hole size space between them. I thought i should twist the hub more but couldnt. Spokes seem more than 3 cm too long and nipples go out of the second hole in a double aluminum rim.
Shimano hb-rm35 hubs 28' 36h rim idk the spoke length or anything about nipples but it was ok before i removed them to change the hub cuz it was broken. Hub was exactly the same before too.

Duragrouch

(above) Yeah that sounds way off, from 3cm too long, to gap between spokes where I think there should be interference. Another thing that could be off is phasing of spokes from left and right sides. Perhaps go to Sheldon Brown and their wheelbuilding articles, try to go thru step-by-step, to find error.

qino88

(couldnt send photos&#128532

Duragrouch

Your pics won't show up until you have ten posts. You'll need help from a moderator to post them for you.

qino88

Separated drive and non drive side too they were too slightly different in length.

Duragrouch

Ok so that answers the question if this is a front or rear wheel. Rear. There are other considerations for rear such as where spokes are leading or trailing.

qino88

It is actually front. May disc brake cause the difference in front?

Duragrouch

Uh yes, my bad, disc front wheels also need dishing, I think.

Bill Kapaun

CM or MM?
3 CM is over 1".

bboy314

Did you use the same hub (or one with the exact same dimensions)?

cb400bill

Picture by qino88 | 33900727 | (bikeforums.net)

Iride01 

The replacement hub has the same flange diameters as the old hub?

Kontact

36 hole wheels are sometimes laced 4 cross instead of 3. If you throw some average parts into a spoke calc program you can see approximately how much difference there is between 3x and 4x in final spoke length. Is that your number?

FBinNY 

Measure a spoke. If it's something like 300mm or so, odds are the original wheel was 4x, and that's your problem.

SurferRosa

For me, it was when I relaced a wheel 3x, and I didn't realize they were 4x to begin!

Bill Kapaun

On that hub, the calculated spoke length would result in the Right side (DS) spokes being 1.1 to 1.2 mm longer. I'm a bit surprised they even bothered with 2 different lengths.



From the chart, you can see the result of using the wrong number of crosses.
The ERD reflects the diameter of the spoke bed. I don't have a clue to what rim you have, but I used a "generic" length for a 622 mm (700C) double wall rim.

https://bike.shimano.com/en-EU/produ...o/HB-RM35.html

Bill Kapaun

Seriously, if you're not sure, why are you giving advice?

It's difficult to undue bad advice. The OP presumes you know what you're talking about when you're not sure yourself.

Trakhak

Many if not most of us here have decades of reflexively thinking in terms of rim brake wheels for bikes, certainly in the absence of data specifying otherwise. Analogously, if you and I read a thread where the OP asked for advice regarding frequent flats, only to find after several rounds of backing and forthing (with mentions of tubeless versus tubed tires, etc.) that the bike had sewup tires, we'd likely be surprised. It happens.

bboy314

I’m still curious to see if there’s confirmation that the same hub is being used for the rebuild. Also, does it seem like all of the spokes are uniformly too long? Any pictures of the build in its current state?

bboy314

Looking closer at your picture, it appears the old wheel was 4 cross.

Bill Kapaun

How far did you screw the nipples on? You only want a couple threads until you get all spokes laced.
Any more than needed is multiplied 36X.

FBinNY 

Side note for the OP.

I believe that the 3x vs.4x theory is probably right.

However, for future reference, please don't take and post photos against a camo background.