AlexBroach

Good luck removing your existing threaded ring. Had the removal tool clamped in a vice, multiple people sitting on the work bench, two people yarding on a 29” rim. Thing didn’t budge.

Gotta add tire width to your possible sku math

Currently fighting Magura warranty support over some floating rotors that devoloped slop, couldn't imagine trusting their brakes...

15k and the only thing that’s size specific is reach??

@Slipa: Good read! I wouldn’t expect tire weight to meaningfully factor into rr (especially since DH casing DHRII is only 40g more that DD). This is their theory from the article: The biggest surprise in our test came from the MAXXIS ASSEGAI: despite identical dimensions and rubber compound, the DH casing version rolls better than the Doubledown. One possible explanation: the DH casing features a coarser 60 TPI fabric, whereas the Doubledown uses a finer 120 TPI weave. The coarser DH fabric might offer more deformation resistance, causing it to flex less under the set pressure of 1.5 bar – meaning less energy is lost to deformation. However, this “phenomenon” can’t be transferred one-to-one to real-world trail riding: in reality, a DH casing would typically be run at a lower pressure – one of its core advantages. That, in turn, would increase rolling resistance again.

@RadBartTaylor: Not necessarily how much they deflect, but how much energy the material eats up when it returns to form (a racket ball is easy to deflect but is low hysteresis so it bounces really well. A ball of wet clay also deflects easily, but is high hysteresis (no bounce)). Large road tires are fast because they absorb road chatter by deflecting out of the way (lowering surface impedance). It’s not too hard to imagine that it takes less energy for the tire casing to flex around little pebbles/ surface texture than having each tiny pebble lift up the entire rider and bike.

gd that one definitely stands out

@Ttimer: Could you show me where they say that? I agree that tread is less important, but casing and rubber both play into hysteresis. On bicycle RR they've tested different levels of casing/puncture protection on the same tire (tread and compound) and the heavier duty tire always does worse. It feels intuitive that thick dh casings take more work to deform and are more damped than thin (balloon like) xc casings. also if fast and tough tires are possible, why doesnt someone make them? is there some tire cabal that's offing engineers to prevent good tires from hitting the market?

i've started following a bit of the gravel world and they're obsessessed with rolling resistance (for obvious reasons). a major takeaway has been that the tire casing makes up a good chunk (in many cases the majority) of rolling resistance. the casing constantly deforms at the contact patch and with a thicker, more damped casing there's a lot of hysteresis (energy lost in the tire returning to its normal state). so unfortunately running a beefed up casing is always going to be draggy. there's a website call bicyclerollingresistance that lists the drag (and a bunch of other things like grip and puncture resistance) of tires. worth scrolling through if you're looking for a quick tire.

World champ hot patch is lame as hell