Last edited by liftmys10; 11-04-2011 at 10:02 PM.
06' Gary Fisher Cake 2dlx with Azonic MTN X Pedals
06' Giant Reign 2 with Wellgo MG-1 Pedals
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?
anyone with the manitou drake 29er?
Lefty 100mm PBR A2C
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?
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.
How to figure out which A/C a frame was designed to use...
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".
<a href="http://www.flickr.com/photos/7166535@N05/6646955123/" title="Dos Niner Geometry by BBcamerata, on Flickr"><img src="http://farm8.staticflickr.com/7013/6646955123_4eef3d2035_z.jpg" width="449" height="600" alt="Dos Niner Geometry"></a>
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.
Last edited by BruceBrown; 01-06-2012 at 07:38 AM.
Axle to Crown Length: 475mm (my measurement)
Manitou's published length is 478, so I'd say that's pretty accurate.
Manufacturer: Nishiki? I think RST or Suntour because its an elastomer fork.
Model Year: 2003/4?
Model: Bigfoot 29er
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).
Originally Posted by Wasmachineman NL
Any updates to this chart for modern shocks?
waiting for a piece (.45)
Axle to Crown Length: 481mm (stock)
Axle to Crown Length: 501mm (stock)
Axle to Crown Length: 541mm
Custom Work: stock out of the box (note: dust wipers are not compatible with later E160 models)
Axle to Crown Length: 545mm
Axle to Crown Length: 541mm
Axle to Crown Length: 570mm
Thank you so much for doing this, it has helped me tremendously.
?? There's a lot of modern forks listed, just 'cause the manufacture changes the stickers does not mean the length changes.
Originally Posted by theskyking
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?
Anyone know the a2c of 2012 Lefty 29er XLR (100mm)? Much appreciated, thanks.
Originally Posted by Juza72
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.
need help choosing a front shock, v brake compatilable, stiff and made for jumping, any advice would be helpfull
I'm saying hi so I can create a new thread specfic to me.
Any rigid fork with 1" steerer, 430-450 a-c, and v-brake compatible?
2013 Rockshox XC 28 TK 80mm Travel, 29" wheel - 483mm
Measured 2009 Fox Talas 150 (15mm axle open bath).
It has additional 2-3 mm that you can force open, but they bounce back like some kind of negative spring.
2012 list of fork axle to crown lengths and rake
This list is from frenk in the following post:
Standard rake/offset for suspension 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 ===
=== 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
=== Pace ===
RC29 100mm: 510/40
=== Vassago ===
=== 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
'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
Ive checksd a couple of sites and they have the axle to crown listed as 525mm.
Do you know the AC of a Float 34 2014 in 160 mm ?
Any data on the 150mm variant of RockShox Sektor?
nm, figured it out: the 15mm axle 150mm travel variant is spec'd at 529 +/- 5mm.
Anyone have Rock Shox link to A to C lengths for all their forks?
All Specification Sheets | Bike Help Center | FOX
Originally Posted by Fat Urkel
For a 27.5 wheel, I want to compare the Pike, Fox 32 and 34, and MRP for 120mm and 130mm fork travels to install on the Pivot Mach 4 medium I have on order. I am interested in comparing weight and axle-to-crown length mostly.
For MRP I can only find their main page, which only says "WEIGHT: 4.3 lbs. for 26/27.5", 4.4 lbs. for 29"; AXLE-TO-CROWN HEIGHT: 553mm for 170mm 26/27.5", 558mm for 150mm 29."
For Pike this is all I can find so far: 1861g (4.10 lb)
Hi, does anyone know what the Mazzorchi 350 (27.5/160mm) forks A2c height is?
Im looking to get a new pair of downhill forks for my bike but i have to get a thru bolt hub for my front wheel. They state that the crown pitch is 140mm but i have no idea what length hub I need to get; a 110mm hub, 100mm hub?
=== White Brothers ===
Loop TCR 29er 80mm: 489mm
Loop TCR 29er 100mm: 509mm
Loop TCR 29er 120mm: 529mm
Loop TCR 29er 130mm: 539mm
Loop TCR 29er 140mm: 549mm
From here, with rakes etc. specs all there too:
Hi guys I havea doubt.
Right now I have a 2009 Rock Shox SID Race 26' 100mm. I would like to trade it for a Magura TS8 100mm.
Right now the 27.5' prices are cheaper than 26. The axle crown difference is 13mm.
Do you think it will hurt? My frame is a 2012 Trek Elite 9.9SSL
I don't plan on converting it to 27.5' (at least for now).