Forks: Complete Axle to Crown Lengths Library

[liftmys10]

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?

I just measured several times Dimension "A" per the CAD drawing as shown here http://service.foxracingshox.com/con..._SPEC_RevA.pdf
On my 2005 Float R 130mm Fork, I'm getting 510mm. The fork is off my bike and i'm a Land Surveyor, using a steel tape that measures in millimeters I also verified Dimension B and I'm getting 486mm

My triple check was taking out all the air and compressing the fork till it bottoms out. I am getting 135mm of travel.

Does this mean i actually have a 140mm fork and the "130mm" sticker is in error?? No wonder I lost the race!

[YoMontare]

This thread gave me some insight into my issue. I have a Gemini tandem. Non-suspension corrected with a Judy DH. I want to replace this fork with something with disk brake and also would like to lower the front end, shorter axle to crown length. I did a crude measurement of the Judy DH and it appears to already be on the low side. Are there any options of finding a fork that is lower than 450?

[Alpha-Q]

anyone with the manitou drake 29er?

[Kristinka]

I´d like to upgrade my bike and assemble Lefty 100mm PBR on it. I was not able to find info about the axle to crown lenght for this fork, though. I´ve found that 110mm Lefty is 475mm. Do you think 100mm travel Lefty A2C lenght would be 465mm?

[vencacampa]

You can try to ask on that info some ebay seller. There is plenty of Lefty's for sale right now. Anyway, nice bike you riding! I just find your picture searching on mtbr. Did you find those ZTR 650 rims? May be I can help you wuth that. I'm riding 29er full suspension now and really like it! 650 wheels should fit almost any 26" frame if you use thiny tires.

[BruceBrown]

I would be curious about interpreting the A/C measurement from a frame manufacturer. For instance, if I go to the geometry page at Salsa Cycles to read about the Dos Niner, it says: * Fork is not included. Fork measurements listed are for an average 80mm 29" suspension fork

Then, in the geometry chart, they list the fork length measurement as 468mm. Not sure if their definition of "fork length" equates to what we are calling A/C in this thread.

If I measure my 2008 Reba Race A/C from center of the skewer axle to the top of the crown on the backside, I get 489mm (which is about what others report for the REBA 29"er A/C 80mm fork - I've seen 486-489, but my year model 2008 is listed by RockShox with a 490mm "crown to axle" as RockShox calls it). If I measure to the bottom of the crown instead of the top, I get the 468mm. Whether that is coincidence or not with the 468mm Salsa "fork length" measurement - I don't know. By the way, my rigid Karate Monkey fork has an A/C of 468mm. So perhaps Salsa is using the "sagged" measurement for the "fork length".



I notice a Fox 80mm 29"er fork has about 9mm or so less in the A/C measurement compared to the 80mm REBA. And a similar difference between 100mm models (looks like about a 6-9mm difference based on who is measuring and which models).

Last question. The chart above shoes the fork offset as 44mm, yet I run an older fork with 38mm of offset. If purchasing a newer fork, what changes would I notice running a fork with the newer offset (closer to the chart's number of 44mm that is) compared to the older 38mm offset?

TIA on interpreting all of this for me.

BB

[MPH_66]

Manufacturer: Manitou
Model Year:2011
Model:Minute Pro
Travel:100mm
Axle to Crown Length: 475mm (my measurement)

Manitou's published length is 478, so I'd say that's pretty accurate.

[Wasmachineman NL]

Manufacturer: Nishiki? I think RST or Suntour because its an elastomer fork.
Model Year: 2003/4?
Model: Bigfoot 29er
Travel:80mm?
Axle to Crown Length 18cm.
Other info: Its the standard fork you get with a Z-29.

[dropadrop]

Manufacturer: Nishiki? I think RST or Suntour because its an elastomer fork.
Model Year: 2003/4?
Model: Bigfoot 29er
Travel:80mm?
Axle to Crown Length 18cm.
Other info: Its the standard fork you get with a Z-29.

You are measuring it wrong. Axle to crown height is the distance from the center of the wheels axle to the top of the fork crown (the point where it enters the frames head tube).

[davide2tempi]

Lyric 170 555 mm

[theskyking]

Any updates to this chart for modern shocks?

[SpecialWarr]

Specialized
2007-2010
Epic E100
100mm
Axle to Crown Length: 481mm (stock)

Specialized
2007-2010
Stumpjumper S120
120mm
Axle to Crown Length: 501mm (stock)


Specialized
2007-2009
Enduro SL
150mm
Axle to Crown Length: 541mm
Custom Work: stock out of the box (note: dust wipers are not compatible with later E160 models)

Specialized
2007-2009
Enduro XL
150mm
Axle to Crown Length: 545mm

Specialized
2010-2011
Enduro E160
160mm
Axle to Crown Length: 541mm

X-Fusion
2010
Vengance
170mm
Axle to Crown Length: 570mm

[likesbikes]

Thank you so much for doing this, it has helped me tremendously.

[dropadrop]

Any updates to this chart for modern shocks?

?? There's a lot of modern forks listed, just 'cause the manufacture changes the stickers does not mean the length changes.

[frenk]

I thought I posted my compilation, but I didn't. Some forks are already listed but others are new. It took quite a bit of effort (and mixed results) calling, emailing and looking around for specifications. Standard rake/offset for suspension forks?

[Juza72]

Anyone know the a2c of 2012 Lefty 29er XLR (100mm)? Much appreciated, thanks.

[jalea]

Anyone know the a2c of 2012 Lefty 29er XLR (100mm)? Much appreciated, thanks.

The Cannondale 29er leftys are are revalved 120mm 26ers I believe. The 120mm is 490mm A2C.

The 26" MAX PBRs and XLR's are not factory revalved, but can be revalved with a kit down to 110mm for 29ers and their A2C is 510mm.

[ringoanny]

need help choosing a front shock, v brake compatilable, stiff and made for jumping, any advice would be helpfull

[manchu6]

I'm saying hi so I can create a new thread specfic to me.

[Dogbane]

Extremely helpful.

[teddyuk]

Any rigid fork with 1" steerer, 430-450 a-c, and v-brake compatible?

Thanks

[vegan_warrior]

2013 Rockshox XC 28 TK 80mm Travel, 29" wheel - 483mm

[CrozCountry]

Measured 2009 Fox Talas 150 (15mm axle open bath).
522mm
It has additional 2-3 mm that you can force open, but they bounce back like some kind of negative spring.

[artnshel]

This list is from frenk in the following post:
Standard rake/offset for suspension forks?


29" Forks
================================================== ====


=== Fox ===

F29 80mm: 480.8/44
F29 100mm: 500.8/44
F29 120mm: 520.8/44

F29 G2 100mm: 510/51
F29 G2 80mm: 490/51


=== RockShox ===

pre-2009 Reba 29 80mm: 489/38
pre-2009 Reba 29 100mm: 509/38
Reba 29 80mm: 486/46
Reba 29 100mm: 506/46

Reba 29 G2 80mm: ?/51
Reba 29 G2 100mm: ?/51

Recon 29 80mm: 486/46
Recon 29 100mm: 506/46

Revelation 29 120mm: 528/46
Revelation 29 130mm: 538/46
Revelation 29 140mm: 548/46

SID 29 80mm: 486/46
SID 29 90mm: 496/46
SID 29 100mm: 506/46


=== Manitou ===

Minute 29 80mm: 490/47.60
Minute 29 100mm: 510/47.60
Minute 29 120mm: 530/47.60

Tower 29 80mm: 490/48
Tower 29 100mm: 510/48
Tower 29 120mm: 530/48

=== Bontrager ===

Switchblade 29: 465/38


=== DT Swiss ===


XMM 29 100mm: 503/45
XMM 29 129mm: 523/45

XRR 470: 470/42


=== RST ===

M-29 80mm: 490/43
M-29 100mm: 510/43


=== Marzocchi ===

Corsa SL 29 80mm: 489.2/44
Corsa SL 29 100mm: 509.2/44
Corsa SL 29 120mm: 529.2/44

Corsa SL LR 29 80mm: 491.5/44
Corsa SL LR 29 100mm: 511.5/44
Corsa SL LR 29 120mm: 531.5/44

Corsa SL RC 29 80mm: 489.2/44
Corsa SL RC 29 100mm: 509.2/44
Corsa SL RC 29 120mm: 529.2/44


=== Niner ===

Carbon Rigid: 470/45
pre-2009 Carbon Rigid: 490/39

Steel Rigid: 470/45
pre-2009 Steel Rigid: 490/39


=== Surly ===

Karate-Monkey: 468/43


=== Cannondale ===

Lefty 100mm: 470/46
Lefty 110mm: 475/46
Lefty 130mm: 500/46
Lefty 140mm: 510/46


=== White Brothers ===

Rock Solid 425: 425/44
Rock Solid 445: 445/44
Rock Solid 465: 465/44

Loop 80mm: ?/?
Loop 100mm: ?/?
Loop 110mm: ?/?
Loop 120mm: ?/?
Loop 130mm: ?/?
Loop 140mm: ?/?

Snowpack 450: 450/?
Snowpack 468: 468/?

Groove 180mm: ?/?
Groove 200mm: ?/?

Magic 80mm: ?/?
Magic 110mm: ?/?

Fluid 110: 503/44
Fluid 135: 528/44
Fluid 150: 543/44

IMV 80mm: 480/44
IMV 100mm: 500/44

F135 135mm: 535/43


=== Salsa ===

CroMoto Grande 29er (80mm-corrected): 468/45
Enabler: 468/45


=== Pace ===

RC29 100mm: 510/40


=== Vassago ===

Odis: 467/45


=== Maverick ===

DUC32 115mm: 520/47.3
SC32 86mm: 494/39.7


=== Vicious Cycles ===

29" rim brake: 470/38


=== SR Suntour ===

Epicon 100mm: 516/?
XCR 80/100mm: 481/?
XCT V3 80mm: 379/?
XCT V3 100mm: 382/?


=== On One ===

Carbon 29er Race: 450/38
Carbon Superlight (alu crown): 470/47

[Noclutch]

'13 RockShox SID RCT3 Solo Air Fork 120mm 29" A-C is ???

Various retail sites list it as 506, but also have the 100mm as 506