Mine are 470mm if that helps

and both are mine are (niner forks)

470mm on the On-One carbon fork

I've bought 2 pairs for Scandal 29er and experimenting with 69er Genesis Altitude:

eXotic Carbon Rigid CC-F0365 29er fork - same as White Brothers - 465mm

Salsa CroMoto 29 Inch Forks - 468mm

Both are supposedly suspension corrected for 120 travel, after sag has been taken into account.

Here, a list of a few susp. fork a-c - maybe it helps..
FOX

All models +/- 5mm

F80: 450.9mm
F90: 460.9mm
F100: 470.9mm
F120: 490.9mm
Float, Talas, Van 130: 500.9mm
Float, Talas, Van 140: 510.9mm (08 Talas: 515mm)
Talas 150: 520.9mm
Float, Talas, Van 160: 545.3mm
Fox 40 180: 545.8mm
Fox 40 203: 571.2mm

ROCKSHOX

All models +/- 5mm

99-08 SID 63: 434mm
99-08 SID 80: 451mm
Argyle 80: 471mm
Argyle 100: 491mm
SID 80: 453mm
SID 90: 463
SID 100: 473
Dart 80:454mm
Dart 100: 471mm
Dart 120: 501mm
Tora XC/SL/RACE 80: 450mm
Tora XC/SL/RACE 100: 470mm
Tora AM 80: 459mm
Tora AM 100: 479mm
Tora AM 120: 499mm
Tora AM 130: 509mm
Recon XC/SL/RACE 80: 451mm
Recon XC/SL/RACE 100: 471mm
Recon AM 80: 459mm
Recon AM 100: 479mm
Recon AM 120: 499mm
Recon AM 130: 509mm
05-08 Reba 85: 458mm
05-08 Reba 100: 473mm
05-08 Reba 115: 488mm
Reba 80: 453mm
Reba 100: 473mm
Reba 120: 493mm
06-08 Revelation 100: 478mm
06-08 Revelation 115: 493mm
06-08 Revelation 130: 508m
Revelation 140: 521mm
Revelation 140 w/Maxle Lite: 518mm
Pike 95: 473mm
Pike 140: 518mm
Boxxer Ride 130: 494mm
Boxxer & Ride 174: 544mm
Boxxer 200: 568mm
Domain 115: 500mm
Domain 160: 545mm
Domain 180: 565mm
Lyrik 115: 500mm
Lyrik 160: 545mm
Totem 135: 530mm
Totem 180: 565mm

oops...that's a long post!

forgot to say, I have a Rockshox Reba sl 29er fork which has 80mm travel, and a-c is 490, same as 120mm 26er forks.

The exotic website has full a-c details for all their forks. I used a set of their 29er forks on my Soul to keep a 130mm-ish feel to the bike, very nice. It's really obvious but do bear in mind that full a-c length on suspension forks is pretty meaningless, it's the sagged number that's relevant.

thats true but is not the sag length calculated at 20-25% of full length:

I also have an old frame with 100 susp. fork - and it was good to know actual length of that fork to know, after sag, roughly what rigid fork length I needed to keep geometry intact.

i run bairly any sag due to the way i ride as need a stiff front end that would give under hard landings (hold the funny comments lol) but after riding locked out i realased i dont need the give and land smoother than i thought(prob as used to racing bmx)

rp16v - from that list I found and posted earlier, the Recon AM 130 has a-c 509mm- to keep the geometry intact will you not need a similar length fork?

correct but i as mine is a older fork and think it may be slightley shorter a-c and all 26" forks are way short so testing the 29er water.

might well plump for the 29er exotics as sugested.

currymad - Member

"thats true but is not the sag length calculated at 20-25% of full length:"

Well, of the travel rather than the full length (and depends how much sag you use, as rp16v points out)

yes, well clarified, I meant full length of travel.

That's what I meant though with no sag, he will need a similar length to his existing forks a-c...I think!

As you said Northwind: It's really obvious but do bear in mind that full a-c length on suspension forks is pretty meaningless, it's the sagged number that's relevant.

In his case the sagged (or not) length is the same as full a-c.

iv managed to get some 29er forks of a diamond back mojito to try so will bolt them on and take som epicks when i get a chance.