Join Date: May 2010
Bikes: trek 560, specialized langster, specialized stumpjumper, felt bmx, GT pro series
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Master Mehcanics: replacing rim, whats biggest ERD difference tolerable?
Have an old wheelset, Mavic Gel 280 tubular rear (ERD 615), Matrix ISO tubular front (ERD 606). I'm looking to swap out to a set of clinchers, and I want both front and rear rims to match. I don't want to have to replace spokes, they're all tied and soldered together, and I really don't want to have to undo/redo all that if I don't have to. So my logic is, run a set of rims that are right in between the 2 original rims as far as ERD goes, maybe even a little on bigger side (smaller ERD) so that front spokes are just a touch short, and have the rear spokes poke through a little and just dremel them down. I know, when lacing a wheel or replacing a spoke, usually one size bigger or one size smaller (ie +/-2mm) is tolerable, so is a difference of 9mm ERD split in half, so a difference of +/-4.5mm ERD on each wheel, going to be able to be made up by having the spokes just a couple mm too long on one wheel and a couple mm to short on the other wheel? Is my logic making any sense to anybody?