Forks: Complete Axle to Crown Lengths Library

[dropadrop]

When this thread was written the info was hard to find, now google will give this list from 50 different places if you search for it.

[Berkley]

Yeah, but I want it in one place...

[Scottytheoneandonly]

Anybody have measurements on the manitou 29ers? Can't find them anywhere.

[e-luder]

Stole this from RideMonkey. Some over lap but it had an older fox that I was looking for.

This might help:


2007 Models Axel to Crown

Corsa WC 80mm 464mm
Corsa WC 100mm 474mm
XC700 SL 464-504mm
XC600 474mm
XC500 474mm
Z1 RC2 538mm
Drop Off 3 538mm
AM SL 1 511-551mm
AM 2 531mm
AM 3 531mm
4X WC ?
DJ 1 483mm
DJ 2 483mm
DJ 3 483mm
Dirt Jam Pro 483mm
66 SL 1 ATA 525-565mm
66 RC2X 565mm
66 RC2 ETA 565mm
888 WC 584mm
888 SL ATA 554-584mm
888 RC2X VA 584mm
888 RV 584mm
Super T RCV 574mm
MX Pro ETA 508mm
MX Pro ETA 488mm
MX Pro 488mm
MX Pro 468mm
MX Comp 1" 468mm
MX Pro I.S. 488mm

CANNONDALE

lefty 140 spv : 510 mm

FOX

vanilla R 2005: 510 mm
Talas RL 2004: 490 mm
Talas RLC 2006: 503mm
vanilla 2004 un peu moins de 500 mm
Float 80mm : 451mm
100mm : 471mm


36 Talas(2006) en 150mm : 535mm
en 110mm : 495mm
36VAN RC2 (2006) en 160: 545mm
40 (2006) : en 178mm : 546mm
-------------- en 203mm : 571mm

MARZO

Z1 130mm drop off QR20: 503mm (2001)
Z1 FR SL (2003) 530 mm
Z1 FR 130 (2005): 518mm
Z1 FR 150 (2005): 538 mm
Z1 MCR (2001)130: 510mm
Z1 LIGHT ETA 150mm (2006): 538.5mm
Z3 Flylight 100mm (2000): 500mm
Z5 air en 100 (2001): 478 mm
888 (2005) en 200mm, 605mm
888 (2005) en 170mm, 575mm
888 (2006) en 200mm: 579mm
66 (2005) en 170mm, 595mm
66 (2005) en 150mm, 575mm
66 (2006) en 170mm: 555mm
66 (2006) en 150mm: 535mm
Marathon S millésime 2002 100mm -> 480 mm
Marathon S 120mm (2005): 495mm
Marathon XC 120mm 2005: 495mm
MX Comp en 105mm: 478 mm
MX Comp en 105mm (2006): 484.3mm
MX Comp en 120 mm : 493 mm
MX Comp en 120mm (2006): 499mm
MX Comp en 85 mm : 458 mm
MZ comp en 100 mm: 488 mm
EXR PRO en 105 mm: 478 mm
EXR PRO en 120 mm: 493 mm
all mountain 110 498mm
all mountain 130: 518 mm
all mountain 150 (2005): 538 mm
all mountain 150 (2006): 541.5mm
DJ2 2004 = 500mm
DJ en 100 mm (2005): 488 mm
DIRT JUMPER (2006) en 100mm: 483.5mm
shiver sc 120 mm : 510 mm
shiver DC: 572mm
Junior T 2003/2004/2005: 555mm
Junior T 2001 = 540mm
Monster en 200 mm: 595 mm

ROCK SHOX

pike: 517mm
Lyric en 160mm: 545mm +/- 5mm
Domain en 180mm: 565mm +/- 5mm
Totem en 180mm: 565mm +/- 5mm
Reba 85mm: 458mm
Reba en 100 mm : 473 mm
reba 115mm: 488mm
Boxxer 04 (178mm de débattement), 555mm en position basse
Boxxer 2005 race, team et world cup en 203mm : 570mm en position basse
Psylo SL uturn : 510 mm
Duke XC 80 mm 2004 : 460 mm
Duke C (année inconnue) 80 mm de dbt : 440 mm
Pilot en 100mm : 475mm
SID RACE 80mm: 442mm
SID SL 2001 80mm: 450mm
SID 1998 63mm : 435mm
Revelation 130mm (2006): 508mm
Revelation 100mm (2006): 478mm

PACE

Distance RC 39 modèle 2005 en 100 mm: 470mm
RC41 Fighter en 150mm 2006: 524mm


MANITOU

Axel Elite 100mm : 480mm
Skareb Super TPC 100mm (modéle 2005): 475 mm
Black Platinum (Reglage maximum):515mm
black comp 2002: 475mm en debat 100mm
Stance Flow:502/532mm
Stance Kingpin: 540mm
Stance Static 80mm: 460mm
Stance Static 100mm: 480mm
Dorado DH: 542.5mm
Sherman Breakout Plus: 512/552mm
Sherman Flick Plus: 492/532mm
Sherman Firefly Plus: 492/532mm
Sherman Jumper: 455mm
Sherman Jumper 110mm : 480mm
Sherman Slider Plus: 540mm
Nixon Platinum/Super/Elite: 518mm
Minute 1/2/3: 505mm
Minute 3 (en 100mm): 470 mm
Millenium: 505mm
Splice 100 mm: 505mm
Splice Elite 130mm : 525mm
R7 (2006) en 100mm: 470mm


MAGURA

Big Ego en 185 mm : 580 mm
Thor en 150 mm : 535 mm
Ronin en 110 mm : 483 mm
Phaon en 125 mm : 504 mm
Asgard en 100 mm : 476 mm
Asgard en 80 mm : 456 mm
Vidar en 80 mm : 456 mm
Quake 115 double té: 525 mm

[gmk]

some measurements are really not correct

[dropadrop]

some measurements are really not correct

Well thanks for correcting them...

[Nsynk]

2011?

Fox 32 150MM
Rockshox revelation 150mm?

[dbtahoe]

When switching from a rigid traditional fork to a suspension fork am I correct in assuming I should remove the recommended sag height % mm's to match my existing geometry? My head is spinning.

[e-luder]

2011?
Rockshox revelation 150mm?

529 according to BTI

[dropadrop]

When switching from a rigid traditional fork to a suspension fork am I correct in assuming I should remove the recommended sag height % mm's to match my existing geometry? My head is spinning.

Pretty much yes. Even after this the geo will be slightly changed as there are a lot of situations where you are actually leaning on the fork making it compress further then sag.

[shalesjr]

I'd like to get a rigid fork for my Evil Sovereign (26" hardtail). I currently run a 150mm Fox Float on it. Would I be better off looking for a 29er fork? Or does anyone make a rigid fork that would keep essentially the same geo of my current setup?

[kirkbrode]

The 29er models are 30mm longer a2c than a 26in model with the same travel.

Looking through all the spec sheets, it appears that the values do not change from 2007 to 2011 for Fox, so the values posted in this thread for Fox should be valid no matter what year you have (as long as its from 2007 to 2011).

All Fox 26in 32mm forks (F-Series, FLOAT, TALAS, Vanilla) are 370.9mm plus travel a2c:
http://service.foxracingshox.com/con..._SPEC_RevA.pdf

All Fox 29in 32mm forks (F29, TALAS 29) are 400.9mm plus travela2c:
http://service.foxracingshox.com/con..._SPEC_RevA.pdf

All Fox 36mm forks are 385.9mm plus travel a2c:
http://service.foxracingshox.com/con..._spec_revb.pdf
http://service.foxracingshox.com/con..._SPEC_RevA.pdf
http://service.foxracingshox.com/con..._SPEC_RevA.pdf

Fox 40mm forks (2007 & 2011):
http://service.foxracingshox.com/con..._spec_revb.pdf
http://service.foxracingshox.com/con..._SPEC_RevA.pdf

Specs for all Fox shocks for 2007 to 2011 are available at the Fox Help tech info center:
http://service.foxracingshox.com/consumers/index.htm

[Warp]

529 according to BTI

Confirmed, according to my tape measure.

[crips]

Looking through all the spec sheets, it appears that the values do not change from 2007 to 2011 for Fox, so the values posted in this thread for Fox should be valid no matter what year you have (as long as its from 2007 to 2011).

All Fox 26in 32mm forks (F-Series, FLOAT, TALAS, Vanilla) are 370.9mm plus travel a2c:
http://service.foxracingshox.com/con..._SPEC_RevA.pdf

I do not believe this is right, I am pretty sure that for a Fox 32 140 mm a-c is 525 mm if you rely on most of the geometry chart for bike with 140 mm forks equipped with Fox, it would be 511 iaw what you posted.

I was looking for a Fox 150 mm too, might it be 535 mm?

[kirkbrode]

I do not believe this is right, I am pretty sure that for a Fox 32 140 mm a-c is 525 mm if you rely on most of the geometry chart for bike with 140 mm forks equipped with Fox, it would be 511 iaw what you posted.

I was looking for a Fox 150 mm too, might it be 535 mm?

I have seen those numbers before too.. (525mm a-c for a 140 mm travel shock) on bicycle manufacturer's geometry charts. I could be wrong but that may be for a fully extended/un-compressed fork (i.e. w/out sag), which is not a functional a-c length since that is not where the shock is when u ride the bike. And/or maybe the bike geometry charts include headset? I'm not sure where the discrepancy comes from.

Did u look at the spec sheets provided by Fox? Fox's spec sheet says a-c (dimension A) for a 32mm fork w/ 140mm of travel is 510.9mm (370.9+140) +/- 5mm, and 520.9mm (370.9+150) for a 150mm travel fork. I assumed this is at sag, but not totally sure on that. Note 2 does say "based on medium rider weight air pressure setting". Pressure would make no difference for a fully extended/un-compressed shock, so there is slight implication that dimension A is at sag.

Do not take my word for it. Look at the drawings and develop your own conclusions.

[kirkbrode]

From Turner's website regarding the 2011 5.Spot geometry:
"{ Listed geometry based on a 525mm axle to crown fork with a 26"x2.3" tire, acceptable fork travel range: 130-160mm }"

Turner's 2011 build kits for the Spot include a Fox 150mm travel fork. This is where I saw 525mm, so it was for 150mm fork, not a 140mm. So the difference is only 5mm, and it falls w/in the 520.9 +/-5mm range. Anyway, I imagine Fox's engineering drawings are more precise than Turner's foot note is intended to be, so I'm sticking with 520.9mm for a Fox 32 150.

[Warp]

I have seen those numbers before too.. (525mm a-c for a 140 mm travel shock) on bicycle manufacturer's geometry charts. I could be wrong but that may be for a fully extended/un-compressed fork (i.e. w/out sag), which is not a functional a-c length since that is not where the shock is when u ride the bike. And/or maybe the bike geometry charts include headset? I'm not sure where the discrepancy comes from.

Very few manufacturers include sagged dimensions... and giving sagged dimensions can be argued as useable as everybody uses different sag and in the end, manufacturers may go for a happy medium or the max length in the industry. That is RS, whose forks are 10mm longer than Fox'

Did u look at the spec sheets provided by Fox? Fox's spec sheet says a-c (dimension A) for a 32mm fork w/ 140mm of travel is 510.9mm (370.9+140) +/- 5mm, and 520.9mm (370.9+150) for a 150mm travel fork. I assumed this is at sag, but not totally sure on that. Note 2 does say "based on medium rider weight air pressure setting". Pressure would make no difference for a fully extended/un-compressed shock, so there is slight implication that dimension A is at sag.

Do not take my word for it. Look at the drawings and develop your own conclusions.

Sag for a 140mm fork is 35mm @ 25%. So, a sagged 140mm fork that is 525mm A2C should be 487mm. So, it is definitively not a sagged dimension... unless they mean 10% that gives you 511mm.

Fox Floats (I don't know and I don't want to guess for TALAS) have a coil negative spring. So, theoretically, if you pump enough you can compress the negative spring and hence, extend the fork. Worth the 10mm??? Who knows?

I think Fox drawings should be correct (because frame manufacturers have to design around them) and they're indeed shorter. But best bet is for someone who has one of the thousands of units sold to date pulls out a tape measure and tell us which is correct.

I did for my Revelation 150mm and it's inside tolerance for RS spec @ 530mm (527 is spec'ed)

My 2008 160mm Nixon is 545mm. 5mm longer than spec'ed.

[kirkbrode]

It would still be awesome for someone who has one to pull out a tape measure and measure it, as Warp said.

[crips]

To clarify this situation I sent an email to Fox and the reply was as follows:

Fox 140mm: 510mm
Fox 150mm: 520mm

therefore I guess that 525mm for a 140mm fork is including headset lower stack height.

So is there a difference of 19mm between a Fox 140mm and a RS Reveletion 150mm forks?

[skidad]

To clarify this situation I sent an email to Fox and the reply was as follows:

Fox 140mm: 510mm
Fox 150mm: 520mm

therefore I guess that 525mm for a 140mm fork is including headset lower stack height.

So is there a difference of 19mm between a Fox 140mm and a RS Reveletion 150mm forks?

Double verify the 140 Fox.

I have a 2008 140mm Talas and I get 510 (511 could be) with forks at full extension. Fox is right on the money.

[johnski]

The a/c of the 2010 Rock Shox Recon Race RL 26er is 470mm...according to the stats on my Black Forest from the Focus website.

[crank1979]

Are the AC lengths for the 2011 RS Revelation 150 different between the 15mm axle and 20mm axle versions? Does anyone have the lengths handy?

[ifouiripilay]

I would imagine no difference in ac length between a 15 $ 20mm axle because you measure at the center of the axle.


My question is how much does the wheel base change with the change in head angle? Anyone know?

[jaltura]

New to the forum and looks like I found the right thread. Hoping maybe someone can suggest a fork (something a few years old that I might find online) for a 2002 Blur (I guess they call it a "classic" these days). I don't even know where to begin when it comes to sizing the thing, and I need something quick to replace the original Marz I bought it with (drop outs cracked), but don't want anything too spendy as I'm hoping to get a new bike in 6 months. Anybody have some advice? Thanks.

[Spartan14]

Good thread. How about some data on the cheaper forks that people would be upgrading from?? You've got the Darts covered, but how about Suntour, etc.

Manufacturer: Suntour
Model Year:2011
Model:XCR-LO-29
Travel:100mm
Axle to Crown Length: 536mm

I measured mine at 53 centimeters then found it listed here at 536 mm.
SR Suntour XCR Suspension Fork 100mm 29" Black 1 1/8" Threadless - New York's Oldest and Largest Bike Store

Good thing I found this thread. I was looking at ordering a 100 mm fox to replace it. It looks Like I may snag a Fox 29er Talas 140mm and be much closer to maintaining the original handling Characteristics

Sounds like the statement about no need to list a cheap fork that someone would actually upgrade from was incorrect. If I simply went with a 100mm Fox thinking it would be close I would be like 40mm shorter.