Wheel Building...
junglist_matty
Posts: 1,731
Pretty much the only area of my bike I don't like touching is the wheels. I'm happy to take on mechanical work on any other parts but the wheels I've never bothered to even think about learning how to do it.
However I would like to learn and I've got a new hub / rim that I'd like to experiment with and build up a wheel, the hub is a rear hub.
I've been reading through various guides on the web and I've seen that I need to determine whether I'm building a 3 cross or 4 cross wheel. from the bikewebsite.com they only have one entry for determining which spoke length to use for 32hole 26" wheels:
26 X 13/8 WHEELS (32 Spokes)
LOW FLANGE 3 CROSS...113/16"..284mm
ALL 26 x 11/4 WHEELS Add 3/16"...4mm
But what do these figures actually refer to?
However I would like to learn and I've got a new hub / rim that I'd like to experiment with and build up a wheel, the hub is a rear hub.
I've been reading through various guides on the web and I've seen that I need to determine whether I'm building a 3 cross or 4 cross wheel. from the bikewebsite.com they only have one entry for determining which spoke length to use for 32hole 26" wheels:
26 X 13/8 WHEELS (32 Spokes)
LOW FLANGE 3 CROSS...113/16"..284mm
ALL 26 x 11/4 WHEELS Add 3/16"...4mm
But what do these figures actually refer to?
0
Comments

To calculate spoke length use the calculator on the DT Swiss site...
http://www.dtswiss.com/SpokesCalc/Welco ... anguage=en
Sheldon Brown has all the details on what measurements mean but if you're using standard parts the DT Swiss calcualtor lets you select the specific rim or hub you are using.
Building wheels takes some patience but it is ultimately very rewarding.0 
What do I need to input for
RIM: [g]  im guessing rim weight?
Spokes: [intersections]  is this 3 or 4 cross pattern for each side?
My rim is spank stiffy,
My hub is Hope Pro 2 (135mm)
32h
Thanks.0 
Enter 543 for ERD
g: enter nothing! It will give you a weight if it is a DT wheel.
Intersections: how many times the spokes will cross. 3 is best usually.0 
Thanks SS....
I've managed to calculate the spoke lengths using the DT swiss calculator:
I have also entered values for the front wheel to check they correspond with the spoke lengths used to build the front wheel (which has already been built by CRC) and they don't match up.
CRC used spoke lengths 256mm and 254mm (written on reciept for the wheel build), which doesn't match the calculated lengths shown above.
Have I done something wrong in making the calculations?
thanks.0 
Is it the same rim?0

Yes, CRC built me the follwing wheel:
Spank Stiffy
Hope Pro 2 Front Hub
DT Swiss spokes (on the reciept the wheel builder wrote the spoke lengths as 256mm & 254mm). The lengths I've calculated are nearly 10mm longer! Something is not right, but I can't see what?
Thanks again,0 
I google an ERD of 527, not 543.0

Thankyou very much!
...I got the ERD from the first result I found in google which was from amazon (strangely enough):
http://www.amazon.com/SpankStiffyGree ... B002DMPEKE
Seems like you shouldn't trust them on their descriptions!!!!
Anyway, I've entered these details into the calculator using the ERD as 527 and the results are much closer now...
If I used these spoke lengths would they be too short? the front spokes were calculated to be 253mm and 255mm (when 254mm and 256mm were actually used).
Should I go up a millimeter in spoke length for the rear spokes or would it not matter too much?0 
Maybe they rounded up!
But they will be fine.0 
Many thanks for you help!!0

Yes, CRC rounded up whereas the DT calculator rounded down. Even number length spokes are more often stocked than odd number lengths.
You need to be pretty sure of the spoke lengths before ordering as most shops don't accept returns.0 
The spokes arrived yesterday so got home from work and laced the spokes using the 3 cross pattern, took me about half an hour or so to get all the spokes in and about another half an hour to evenly tighten each spoke:
So here it is, my first attempt at a wheel build:
Tonight after work I'm going to have a go at truing it up... This is the bit I think will be the hardest!0 
how come you chose to user define the hub?, it is available in that site on the drop down list.
Have you got a truing stand? i bought an ebook from wheelpro.co.uk about wheel building and it came with instructions for how to create a truin stand from MDF, it looks pretty good and should be fairly cheap.0 
HandjobDan wrote:how come you chose to user define the hub?, it is available in that site on the drop down list.
Have you got a truing stand? i bought an ebook from wheelpro.co.uk about wheel building and it came with instructions for how to create a truin stand from MDF, it looks pretty good and should be fairly cheap.
Nope, gotta buy one. I've got my eye on the Park tools home truing stand, its about £100; not too bad considering I'll get a lot of use out of it.0 
My mate just uses his frame as a truing stand  you can bodge guides with old paperclips and blutac. He does get them checked afterwards at his LBS but it's amazing how true he gets his wheels!!0

dave_hill wrote:My mate just uses his frame as a truing stand  you can bodge guides with old paperclips and blutac. He does get them checked afterwards at his LBS but it's amazing how true he gets his wheels!!
Yeah I was gonna do this using the pencil with bluetac and rubber band trick for now and see how it goes but I will probably buy a truing stand on payday then I've got one and can true any of my wheels more accurately  which will be really good because I'll be able to keep all my wheels in tip top condition!0 
I use an old pair of forks in a vice as a truing stand. Rear wheels can be trued by placing the wheel outside the forks on one dropout.0

sorry newbie wheel question, but how do you work out how to lace the wheel. like what is the 3 and 4 setup? where do i put the spokes? any help greatly appreciated.
thanks0 
m@tty123 wrote:sorry newbie wheel question, but how do you work out how to lace the wheel. like what is the 3 and 4 setup? where do i put the spokes? any help greatly appreciated.
thanks
Best thing you can do is buy a wheel builiding manual. It's much too complcated a process to describe here on this site. Maybe little tips here and there, but to understand the whole thing, buy the book.0 
m@tty123 wrote:sorry newbie wheel question, but how do you work out how to lace the wheel. like what is the 3 and 4 setup? where do i put the spokes? any help greatly appreciated.
thanks
Its too complex to write out here, but to get started read through this...
http://www.sheldonbrown.com/wheelbuild.html
Make sure you fully understand it before you decide to go ahead and build a wheel... Spoke length is crucial, make sure you don't use the wrong length spokes or your wheel will be all wrong.0 
you can also buy a wheel building book from www.wheelpro.co.uk which includes a plan for a wooden truing stand in it. Seems like a good guide0

oh right ok, any links to where i can get the book for a decent price?
cheers0 
it's an ebook, you pay through PayPal and then download it.0

oh right ok thanks for all the help people.0

m@tty123 wrote:sorry newbie wheel question, but how do you work out how to lace the wheel. like what is the 3 and 4 setup? where do i put the spokes? any help greatly appreciated.
thanks
You read Sheldon Browns webpage guide to lacing wheels. It's what I used last night to lace a wheel up.
http://www.sheldonbrown.com/wheelbuild.htmlI've added a signature to prove it is still possible.0 
I'm increasingly of the view that it's better to measure your own components than to rely on someone else's specs. This is particularly important for ERD which as the longest dimension is the one that has the greatest affect on the final result (Lacing pattern is the next). Relatively speaking the hub dimensions are not so sensitive.
I have a free spoke length calculator and database available for download at http://www.wheelingwrinklies.co.uk/WBPE/WBPE.html which includes some fancy postbuild analysis stuff if you want to get really fussy. Just added a gear calculator too. Mac and PC versions and I've also posted a draft video of how to measure your hub (adding rim measurements shortly)
Enjoy.I may be a minority of one but that doesn't prevent me from being right.
http://www.dalynchi.com0