BrzilianTri wrote:
I need a little help trying to figure out what tubeless Zipp and tire I can fit on my rim brake 2019 Trek Emonda SLR 6. Trek says that max 25 R3 tires.
Zipp 404 with continental 5000s tr? I think 303 are a no go with 25, right?
Thank you for the help.
i think you're in a squeeze, if i understand it. you have a tire clearance max of 25mm in your bike frame. but you have a min 25mm on the wheel. that's your size. 25mm.
if you had a zipp 353 NSW, you'd be screwed. that wheel has an internal bead width of 25mm, and 28mm is the smallest tire you can put on it. but if you have a NEW 303, with a hookless bead, it's like this:
if your wheel is a 303 Firecrest, U B screwed. that's got the same bead geometry as the 353 NSW.
if your wheel is a 303 S, then you can ride a 25mm.
that said, i'd look and see whether the max tire width really is 25mm on that trek of yours. i find a lot of my bikes will take tire sizes 2mm to 5mm wider than what the bike maker says.
if your 303 is a previous generation wheel, with hooked beads, you have a lot more freedom to ride all kinds of tires, tho i don't know offhand what among those older wheels are tubeless ready.
only other thing: let's say you want to ride a 25mm tire on a zipp 303 S. you can't ride just any tire, nor even any tubeless tire. for example, you can ride the new conti 5000 tlr, but not the old one from, say, last year. these newer tires have stiffer beads, less stretchy, and that's what you need to ride with these new hookless beaded rims.
Dan Empfield
aka Slowman