View Full Version : Help: How you calculate handbuild wheel weight?


drPD
11-30-2007, 12:55 AM
I would like to have handbuild wheels: OpenPro with Chorus hubs.
I am about 175 lb and mainly do triathlon and local road race.

I made a calculation:

Mavic Open pro (32) - 2x 435 g = 870 g
Chorus front hub (32) - 116 g
Chorus rear hub (32) - 231 g
DT Swiss revolution spokes (64) - 262 g
DT niples aluminium (64) - 20 g
-----------------------------------------------------------
1501 g
:cool:

Hubs weight are without quich-release !

Questions :p :
1. Is this calculation correct?
2. What is the weight of campagnolo quick-release?
3. Is quick-release usually calculated in wheel weigth?
4. Number of spokes 32f/32r is good for my weight or can I go 28f/32r or less?

Best Regards,
PD.

ergott
11-30-2007, 03:20 AM
Hubs:
front -128g
rear - 265g
rims - 443g
spokes - 320g (5g X 64)
nipples - 6g

1605g for the set. I have weighed all those components before. That's without skewers. That's assuming that you have Chorus hubs. They don't make them anymore. Current Record hubs weigh 114g and 231g. Set weight of 1557g. The spoke weights published are for 264mm spokes. You need spokes that are in the 295mm range.

-Eric

drPD
11-30-2007, 03:56 AM
Eric thank you for your answer.:)

What about deciding front - rear number of spokes? :confused:

32f/32r or it can be less? For example 24f/28r or 28f/32r? :confused:

BR,
PD.

ergott
11-30-2007, 04:03 AM
With Campy hubs you only can do 32.

-Eric

bbgobie
11-30-2007, 05:41 AM
Don't forget rim strips if you care...

rruff
11-30-2007, 08:40 AM
I am about 175 lb and mainly do triathlon and local road race.


It sounds to me like a more aero setup would be more suitable for you. Nio30 rims and CX-Ray spokes wouldn't cost much more. You can use 32h hubs with 24h rims. The Record hubs are a good candidate for triplet lacing on the rear, and the front could be laced in a modified crows-foot (24h) or use a 36h hub and an 18h rim. This might be a bit "light" for someone your size, but not if you are reasonably easy on wheels. I've been riding 18f and 24r with these rims at 165lbs and they are holding up great. They will weigh less than the wheels you proposed and be more aero.

ROGER79
12-04-2007, 11:30 AM
Where would I find all the Formulas for calculating spoke length and all the neccesary parts???
Rim Diameter???
hub diameter???
Spoke length, lacing pattern, etc.

Is there a website or book or ?????

Thanks for the info!!!

rruff
12-04-2007, 12:56 PM
Damon Rinard's Spocalc is a good place to start. There is a data base of parts but it is several years old. DT has a calculator on their site...plus their are a bunch more if you do a search. Do a search for the particular hub and rim you plan to use, and beware that rim dimensions can vary a bit.