JB help please!

[XTC OKE]

I need to know what length spokes to use on a American classic light hub set and ZTR olympics.

 

DT revolutions in black, anybody want to sell the spokes to?

 

[xak1]

Rim ERD: 536

Disc 140 Front Hub:

Flange diameter: 58mm

Flange distance left: 24.5mm

Flange distance right: 32.5mm

Disc 225 Rear Hub:

Flange diameter: 66mm

Flange distance left: 27.4mm

Flange distance right: 22.6mm

 

Use following calculator:

 

http://www.wheelpro.co.uk/spokecalc/

 

Specs found at (if non-disc hubs check other specs):

 

http://www.amclassic.com/documents/help/AC_HubChart09.pdf

 

http://www.notubes.com/product_info.php/manufacturers_id//products_id/296

 

 

Please check calculations, but here are results for above:

 

 

 

[XTC OKE]

thanks alot

[xak1]

Pleasure - forgot to say that it assumes 12mm nipples and you can round lengths down, even if it is x.9, round it down to x.

[Johan Bornman]

I'm back. Had a short holiday.

 

You need to know what formula the spoke calculator uses. If it uses the absolute distance between two points in space, then you need to round down a lot. The reason for this is that spokes stretch up to 3mm. If you take them at exactly the calculated length, then they will be too long if broubght up to proper tension. At best, they'll simply protrude slightly beyond the nipple and not allow you to use a screwdriver to remove a stripped (flatted) nipple. You'll have to cut the spoke.

 

The ideal wheel is where the spokes just-just approach the slot in the nipple.

 

Some rules of thumb:

 

1) With Revolution (or Sapim Laser) spokes, round down by 3mm for road bikes and 2mm for MTBs.

2) With Double-butted, round down 2mm for both.

3) It is Ok to round down 3mm if your next available length is 3mm shorter.

4) Don't bother with straight gauge spokes, not even for cheap bikes.

5) Never use threadlock.

6) Don't bother with aluminium nipples.

 

But most important: Longer nipples don't require shorter spokes. That's a myth.

 

 

PS. Contact me on 0823086847 if you want to buy the right length spokes.  Black Revolutions are expensive.

 

Johan Bornman2009-09-24 08:11:22