Hi.

I am looking for some advice regarding spoke lengths, having had a look online and used various calculators I think i have the correct figure but would like some confirmation.

Here is the info, I would really appreciate it if someone could help with this or even point me in the direction of a company who could (I will happily pay!),

Hubs – Pro 4 Straight pull
Rim ERD – 540.5mm
Asymmetric rim so 3mm off set
Spokes – CX Ray aero

The remaining info is on the graph below:

I came out with 271 F & 270mm R.

Does this look right?

Thanks in advance

How many spokes and what pattern ?

That would also help!

32H & 3 cross pattern

By my calcs using DT 12mm nipples (which should be the same as the ones that come with your CX Rays I think) the you get 267 all round. Calcs here: https://www.dropbox.com/s/r3hhejpkqjhqdv3/Calculation-04032017-181015.pdf?dl=0

Edit: FYI you’re calcs are based on j bend not SP hubs hence the difference.

Thanks for the reply Ben and screenshot, does that also actor in the asymmetric rims? I presume they will make a difference compare to normal?

Yes, you’ll notice that the flange distances are +/-3mm from what they actually are to account for the asym rim. You should check my numbers against this to double check: http://www.hopetech.com/wp-content/uploads/2016/02/2016-PRO-4-SP24-HUBS-SPOKE-OFFSET-AND-PCD1.pdf

Wheelpro agrees: https://www.dropbox.com/s/aemfmk7tl91hasv/Wheelpro%20calc.pdf?dl=0

EDIT OK all fixed 🙂 268s all round.

Is that ERD from the manufacturer or measured? Double check it!