Tartridge Posted August 4, 2004 Report Share Posted August 4, 2004 Right. This is how you work out spoke lengths. Measure the ERD of the rim (dont ask, just do it). Measure 4 simple dimensions on your hub. Download a spoke calculator programme for Excel. Put the numbers in. Read off spoke lengths. Measuring your rim ERD: Get 2 spokes and 2 nipples. Thread the nipples onto the spokes til the end of the spoke is flush with the top of the nipple, loctiting it in place. Cut the spoke down to 200mm overall length (needs to be accurate to 1mm) Repeat, so you have two. Pop them through opposite holes in your rim (valve hole and join are good markers) and measure the distance between the two ends with a ruler. Here it is 142mm. So you add on the 400mm of the spokes, making the ERD 542. For mod wheels, theyre usually under 400 - so measure how much the spokes overlap by, and subtract it from 400. So thats 366mm in this case. This value goes into the 'ERD' field in your spoke calculator (more on that later) Measuring the hub: This is also very easy. All you need is 4 simple dimensions to a reasonable accuracy. The dimensions you need are: Centre of hub to Right Flange Centre of hub to Left Flange Diameter of Right Flange Diameter of Left Flange MTB rear hub spacing is 135mm - so halve this, and find a place on the hub that is 67.5mm from one of the ends of the axle (hub graphics/logos help here) In this case, the bottom of the serial number is pretty close (68mm from the drive side end), so i'll use that. Measure from that imaginary marker to the middle of the Right Flange... bout 22mm in this case. And then to the left flange... bout 33-34mm. Then you need to do the flange diameters. This is from the centre of one spoke hole to the centre of the opposite spoke hole. Tis about 55mm here, its a bit skewed cos of perspective. Do the left and the right flange. Many manufacturers have these dimensions on their website. Then click here if you have any common sense, and here if you are rather thick. Then click 'Open'. Click 'OK' if it gives you some bullshit about Macros and security levels. I'll run through the 'thick' version... normal people will be able to work it out. Input no of spokes - easy. Input the ERD you just measured. Centre to flange... self explainatory - you just measured it. Do right hand side first. Flange diameter - ditto - Right hand side. Set spoke hole diameter to 2.4 Set X to 3 (not 2.5 as shown) for normal wheels. 2 and 4 can be used, but this is unusual. The number in the bottom right is then your spoke length for that side of the hub. Repeat using the 'Left Flange diameter' and 'Centre to left flange' dimensions to get the other side. And... thats it! The end to all 'What spoke length?!' topics, woooo!! ;) Quote Link to comment Share on other sites More sharing options...
Al_Fel Posted August 6, 2004 Report Share Posted August 6, 2004 (edited) Chris King Iso rear on rear Koxx rim 260mm DS x 262mm NDS. Chris King Iso front on front Koxx rim 262mm DS x 260mm NDS. Edited November 16, 2006 by Anal_Teflon Quote Link to comment Share on other sites More sharing options...
Tomm Posted August 6, 2004 Report Share Posted August 6, 2004 Right a few links I've found whilst trying to find spoke lengths for someone (It's not as easy as simply "use the search"): For all Hope hub info Use the spoke calculator here. Also has basic info for Mavic rims. Would also work if you know the details of other hubs (But it has Hope hubs built in). Another basic one Here The ERD of a Tryall rim (Front or rear - they're the same) = 534mm The ERD is the only thing you need to know if you've got a Hope Hub, just use that site ^^^ "Hope" that helps :D Quote Link to comment Share on other sites More sharing options...
Tartridge Posted August 7, 2004 Author Report Share Posted August 7, 2004 The ERD of a Tryall rim (Front or rear - they're the same) = 534mm ← Is it? The one i measured up there was 542 :blink: Quote Link to comment Share on other sites More sharing options...
matt_urban Posted August 28, 2004 Report Share Posted August 28, 2004 170mm for a 19inch monty rim on a onza sealed hub (Y) Quote Link to comment Share on other sites More sharing options...
damo Posted September 30, 2004 Report Share Posted September 30, 2004 180mm for a 19" koxx try-all rim on a profile bmx hub Quote Link to comment Share on other sites More sharing options...
quick_spider Posted October 4, 2004 Report Share Posted October 4, 2004 Mavic ERD's from the dealer site: Make sure you get the right one since Mavic seem particularly bad at naming their rims something sensible... Cross Country X717: 538.5mm X517: 537.5mm X618: 538.5mm 217: 537mm 217 D: 538mm X317 :538.5mm Cross Mountain XM819: 532mm XM719: 536mm XM517: 538mm XM117: 540mm X3.1 : 532mm F519 : 536mm Extreme MTB EX721: 532mm D521 : 532mm 121 : 541mm XM321: 536mm EX729:534.5mm D321:534.5mm Quote Link to comment Share on other sites More sharing options...
sexymike Posted October 5, 2004 Report Share Posted October 5, 2004 i got 265mm for a King Iso rear to a Phatso. Quote Link to comment Share on other sites More sharing options...
Tartridge Posted October 5, 2004 Author Report Share Posted October 5, 2004 i got 265mm for a King Iso rear to a Phatso. ← Which side? Sounds about right, ish, for 32h drive side... Quote Link to comment Share on other sites More sharing options...
Tartridge Posted October 7, 2004 Author Report Share Posted October 7, 2004 Mavic ERD's from the dealer site: Make sure you get the right one since Mavic seem particularly bad at naming their rims something sensible... Cross Country X717: 538.5mm X517: 537.5mm X618: 538.5mm 217: 537mm 217 D: 538mm X317 :538.5mm Cross Mountain XM819: 532mm XM719: 536mm XM517: 538mm XM117: 540mm X3.1 : 532mm F519 : 536mm Extreme MTB EX721: 532mm D521 : 532mm 121 : 541mm XM321: 536mm EX729:534.5mm D321:534.5mm ← Most, if not all of those seem to be wrong (Y) For example, XC717 is 542. If you want something doing properly, do it yourself :P Quote Link to comment Share on other sites More sharing options...
quick_spider Posted October 7, 2004 Report Share Posted October 7, 2004 Probably best to scrap that list then: The "XC 717" isn't on that list... although Mavic claim it to be 538.5mm (They're probably the same rim, but in their wisdom Mavic list them as different ones on their site) Jon Quote Link to comment Share on other sites More sharing options...
boon racoon Posted October 8, 2004 Report Share Posted October 8, 2004 Atomlab DHR 24 INCH... ERD = 491mm Quote Link to comment Share on other sites More sharing options...
Pauly Posted November 14, 2004 Report Share Posted November 14, 2004 front 26 viz rim ERD is 542 mm Pauly Quote Link to comment Share on other sites More sharing options...
Dan Clark Posted November 19, 2004 Report Share Posted November 19, 2004 King Classic on Onza Ronnie, 32 hole, rear 264 x 268 Quote Link to comment Share on other sites More sharing options...
spunkey_monkey_boy Posted December 5, 2005 Report Share Posted December 5, 2005 (edited) just to let people know, a hope mono on an alex dx32 26" 32 hole 3 cross will need 270 spokes and the old rear echo fixed hubs (ones with a fixed cassette for 6 gears) will need 269 DS and 271 NDS oh yeah and check our chainreactioncycles for fecking cheap spokes, shame they dont come long enough for these wheels though!!! Edited December 5, 2005 by spunkey_monkey_boy Quote Link to comment Share on other sites More sharing options...
Lawnmowerman Posted December 5, 2005 Report Share Posted December 5, 2005 (edited) What hub? Woops! Your looking for the erd :huh: ERD for a dx32 is 550mm Edited December 5, 2005 by trialsboy560 Quote Link to comment Share on other sites More sharing options...
011001000110010101110010 Posted February 20, 2006 Report Share Posted February 20, 2006 Hope Pro Trials 2 hub:Flange Diameter is 63mm (both the same)Distance from center to flange is 32.5 mm Quote Link to comment Share on other sites More sharing options...
Greetings Posted April 2, 2007 Report Share Posted April 2, 2007 sorry for bumping this, but could some mod or admin put the pics back where they belong? Quote Link to comment Share on other sites More sharing options...
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