The Unexpected Secret to BOTH Is Tire Pressure | Fatbike Myth Busted |
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- čas přidán 7. 09. 2024
- How much air pressure should you have in your studded fatbike tires? The conventional wisdom is that we should be running super low tire pressures, I've heard as low as 3 PSI, but is that really true?
Is it really a trade off between low rolling resistance and traction? The best tire pressure for you is going to depend on your weight, the size and width of tire, and the conditions you’re riding in. BUT! (There’s always a but) riding with draggy low pressure tires is not going to help you bed studs into an icy surface. SO, unless the trail is super soft, try adding MORE air to your tires to gain traction, control AND speed.
🤘🏻🤘🏽🤘🏿
We tested it by timing my best laps at every tire pressure from 10 PSI down to 3 PSI, and the science is in, and you can't argue with science!
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Getting the proper tire pressure on fat bikes is analogous to hitting the kick wax for cross country skiing. It varies considerably with conditions, and different tires will yield very different results on the same day, same pressure - but my rule of thumb is "soft snow, soft tire. Hard snow, hard tire."
The studs must dig in to provide traction on ice. This digging-in must be transferred through the tires' rigidity. The lower tire pressure allowed the tire to deform, which led to rigidity loss. I'm curious to see the test results with higher tire pressures than 10 psi. I assume it will be more effective to a certain level, let's say 15 psi. Anyway, this is a very interesting test.
Thanks Steven. I think you’re exactly right.
@@BetterOnTwoWheels I think you are right in thinking Steven is right.
This is awesome! It makes sense though. Rally cars go with super aggressive studs and skinny tires for ice. They also have to drive more aggressively to make sure the studs dig in.
Awesome video! You have a new subscriber from Lethbridge!
Awesome! Thanks! And very cool about the rally cars.
There are so many variables with tire pressure. I guess like anything, what works for me might not work for others. Tire, the persons weight...blah blah blah. I was on a group ride once and one rider kept telling everyone to lower their pressure. The conditions were a solid trail with some ice here and there. This person told me to lower my pressure but I felt I was riding well and had great traction. I faked releasing air just to see what would happen. That person said, 'see I told you would have better traction'. LOL!!!
LOL!
Set em straight in NB! (Share this vid!)
Thanks for checking out the channel!
I’m not surprised as ice with studs gives plenty of traction. Having more air likely creates a better surface tension for the studs to bite in. Lower pressure really makes more sene on snow that is deeper by spreading the tire across more surface so you can take advantage of what traction is available. Think snow shoes verses ice skates.
Exactly, especially in retrospect. Still, it’s crazy how many people still just operate on the basic premise of fat bike = low pressure. Glad you enjoyed the experiment!
Better yet would be to use the Johnny 5 or the Yippee rubber. Cake Eaters do not have sufficent amount of studs for pure ice riding.
I’d love to have the resources to be able to do that test. Thanks for checking out the vid.
Great video Tyrn, Will you be doing a soft snow or groomed snow comparison like this as well?
I’d like to, for sure. If this topic proves interesting (popular), I’ll definitely dig into it a bit more. Might be hard to find groomed snow around here though! lol
Doesn't surprise me, sorry :-) If you think about it the lower pressure isn't going to provide as much rigidity for the studs to dig in. It would be interesting to see this test repeated on different surfaces and with different brand tyres. If you're racing motorbikes you adjust the pressure on a range of factors such as surface, temprature, tyre construction, and rider feedback. There's no one size fits all.
All very true! After seeing these results, it makes complete sense. Just was counter to what many of us believe by default. Thanks for the great comment!
Timmy Ho's on a Zamboni? How Canadian can you get, eh?
Loving your approach to this video and a question I had myself this winter with all the ice riding I've been doing. Coincidentally your "fast" pressure of 8psi is exactly what I'm using on my studded 27.5x4.5" Gnarwhals on ice. Fat biking at low psi is a massive speed suck and when conditions warrant it, a neccessary evil. That said, the magic pressure for a given weight (I'm a portly 230lbs) on ice will match up a wheel's footprint with maximum pressure on the studs for grip. So as you lower pressure, the footprint is larger, but that decreases pressure on a given stud. So, great for soft snow when you're slipping, but not good on ice. Btw, 10psi feels pretty solid to me too, ha. This vid is pretty much 100% on ice: czcams.com/video/XZjsZ-uscJk/video.html
Low pressure is for snow. 😊
Great video. I am sure we all thought lower pressures were going to be better
As did I!
Wow, that was really surprising.
Right?!
epic moves at 0:54!!!
Haha!! I’m glad someone enjoyed that! 😂
Now that I have. Fanttik Nano digital pump I change pressure every ride. Anywhere from 3psi to 9psi. The pump has been a game changer. No studs required .
1psi?
I think you need a new gage as 10psi is not rock solid.
On a 4.5” tire, that’s pretty firm, but sure, good feedback. You want verification on the pressures. 1 psi is at the end of the vid, btw. 👍🏻