Looking for the ERD of the 729 and the Dee Max rims (same as the 823?) Thanks....Can't find this info anywhere!
I thought your bike was finally built.JohnnyBoyDH said:Looking for the ERD of the 729 and the Dee Max rims (same as the 823?) Thanks....Can't find this info anywhere!
ohhh, ditto.Transcend said:effective rim diameter. It is used for calculating spoke length.
Thank you, you saved me from the doom of incorrect spoke length! The DT spoke calc is spitting out 252mm L and 253mm R when you enter 16mm spoke nipples.Nipple length has nothing to do with spoke length (the threaded portion of the nipple is exactly the same), I have absolutely no idea why the DT site does this.
The measurement that Mavic gives is NOT erd...it is thier own proprietary french made up measurement called spoke bed diameter...and it is indeed 528. To get erd from sbd, you add the thickness of two nipple heads....so about 4-5mm
Use 532 or 533mmmmmmm and use try spocalc (downloadable excel calculator) http://www.sheldonbrown.com/rinard/spocalc.htm it is a great little tool!
Nipple length has nothing to do with spoke length (the threaded portion of the nipple is exactly the same), I have absolutely no idea why the DT site does this.
Nipple length has nothing to do with spoke length (the threaded portion of the nipple is exactly the same), I have absolutely no idea why the DT site does this.
Describe what you mean by 'all the way'. Rolled threads are larger diameter than the spoke itself. You can thread the spoke right through the nipple if you want to. If you thread the spoke to the top of the slotted end of the nipple (as you would for maximum thread engagement) the length of the spoke/nipple combo with be the exact same length end to end, as well as elbow to nipple seat. Look at the pictures posted, the heads are the exact same shape on all nipples (so they will seat on the rim in the same way), and all spokes can (should be IMO) be threaded all the up to the slot when fully tensioned. The configuration of the 16mm nipple in the photo leaves the nipple internally unsupported and creates a stress riser at the exact place where the rim places the highest force on the nipple. Ever seen a nipple head snap off? Ever seen one snap off that had the spoke threaded all the way through the rim plane and near flush with the nipple?Have you actually measured a 12mm versus 16mm nipple when threaded all the way onto a spoke? The 16mm nipple has the seat that contacts the eyelet 2-3mm farther out than a 12mm.
Surely you know that when you screw past the threads on a spoke you actually start cutting more (partial) thread into the spoke? it's not really ideal.... You can thread the spoke right through the nipple if you want to.
I just checked a few DT spokes and nipples I have none of the spokes will thread right through the nipple unless it is forced and the nipple trys to cut more threads on the spoke.Describe what you mean by 'all the way'. Rolled threads are larger diameter than the spoke itself. You can thread the spoke right through the nipple if you want to. If you thread the spoke to the top of the slotted end of the nipple (as you would for maximum thread engagement) the length of the spoke/nipple combo with be the exact same length end to end, as well as elbow to nipple seat.
The wheelpro book is a worthwhile investment in biking knowledge. After you read that you realize all the wheelbuilding 'mystic art' stuff is just crap. It all seems pretty simple after you read it, and well, it is.I try to read every wheel building thread that comes around, it's the only area that I lack knowledge when it comes to bikes. After numerous threads I still have no fricken clue what Im reading and my eyes hurt. Somebody has to offer classes on wheel building.
Noah, finally joining the 823 army! Did Orvan try to drag you to the fulcrum side?
Nope, no kool aid involved. I chose 823's for an easy tubeless setup and a little weight savings. The Fulcrums are too pricey and only take a campy cassette, yuck!Noah, finally joining the 823 army! Did Orvan try to drag you to the fulcrum side?
The calculator caters for all spoke/nipple manufacturers. Some nipples require compensation, some don't and I explain this on the Help page. If you use the calculator and select any hub matched to a Mavic UST rim (819, 823) and calculate the spoke lengths it gives you a prompt to modify the calculated lengths.I find it a bit funny that Roger musson does not allow nipple length variations in his calculator, that by his own words is: "the calculator is perfect - if it wasn't I would change it! ".