That's really cool. However, I don't know how many people would buy it.

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Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/

LOL...next thing you know Thompson is going to put a scale in their seat posts to give you real time weight so you know how fat you are at any given time.

LOL...that is hilarious...I'd trademark that quickly before you see it on Kickstarter.

Would be interesting for cyclocross. Let’s see if Wout van Aert and team use it for the up coming season, as he is the marquee guy for SRAM.

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Alex Arman

Strava

Pretty dang pricey. For mid ride use, seems to me that only knowing about a significant drop would be worthwhile.

Yeah DCRainmaker said sweet spot for that is 99 for the pair...someone wrote in the comments..."a solution in search of a problem" lol. I love gadgets but I can't see myself spending even 99 USD for that.....

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"see the world as it is not as you want it to be"

The more I think about it, this is meant for riders running tubeless or tubular with sealant. Assuming you get a puncture that the sealant fixes, and you lost some pressure in the process, your computer can let you know you need to add air or in the case of a pro CX rider, get a new bike in the pits next lap. I think mountain bikers would use this most to quickly verify pressure before dropping into a gnarly section that could have them end up in the hospital.

For general road riding with tubed wheels...it doesn't make sense.

Thanks for the heads up.

Doesn't seem like it would work(fit) for my Hed C3's or any Deep rim.

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"Good genes are not a requirement, just the obsession to beat ones brains out daily"...the Griz

I'm not paying $199 but this would be pretty useful. Think about it, most serious cyclists are (rightly) obsessed with tire pressure but we actually have no accurate data on what pressures we are really using at any given time. You pump up to X but then drop by some unknown amount when you take the pump off. Then, you go out and ride for hours on tires we know lose some pressure over time even if they are not damaged in some way and we often ride in wildly changing temperatures which might affect pressures. Now, those who really care can know what their pressures are over the course of an entire ride and, since the data syncs, among other things it will make analyzing various pressures with performance easier. Some folks will be able to make great use of that data. And then there is the side benefit of knowing your tires are holding air before some critical time like before a high speed decent . . ..

Way too pricey for most but a great little gadget.

An anal cyclist will check their pressure with a quality pump before each ride. A quality pump costs way less than $200, and it actually pumps up your tires too! You don't lose pressure when you take the pump head off the valve unless you have a crappy pump head or a bent valve core. The "hissing" sound you hear is the pressure releasing from the hose of the pump, not coming out of the tube.

Tire pressure doesn't actually change that much during a ride even with regards to temperature over the course of many hours. And even if you did...what are you actually going to do about it. Pull over and crack a CO2 just to add 2 psi? Or bust out a hand pump?

As per my first sarcastic reply...perhaps we should develop a seat post that also acts as a body weight scale. Because we don't have accurate data on how our weight fluctuates mid ride as we sweat, drink, eat, and burn off calories. If you're going to be that meticulous about tire pressure mid ride, then you also need to know exactly how much you weigh at that same point in time.

I had an unusually tough time on the last 20 mile ride of a full iron. When I picked up my bike after the race, the rear wheel was completely flat. I don't know if it was going flat during the ride and I was too dazed to notice, but I'd have killed at that moment to know if I had a slow leak.

But $200? Nope. I'd do $50 for a pair.

Yeah, the only use-cases I can see are for pros. In cyclocross you could go in for a bike exchange before your pressure goes critically bad.

I could see a team car in pro road racing having a tablet with the tire pressure telemetry of all their riders, so they can be in the right place quicker for the wheel exchange.

But those are extreme edge cases. We're talking Wout Van Aert and Peter Sagan.

That has interesting implications for things like Zwift racing. Monitor continuously through a ride and it would be difficult to just take a little pressure off the saddle during the initial weigh in.

...and the only other thing I can think is the data logged over time might be useful. You could conceivably use the data combined with logged power meter and "aero stick" data to then calculate what tire pressure gave you optimal rolling resistance. It would just be a convenience in that case, though.

I suppose that would be a valid case...assuming that this thing reads accurately while the wheel is in motion and the tire/tube compresses near the valve on every rotation. Seems like a cumbersome thing to apply to your tube just because you're too lazy to manually record what your floor pump says before each run though.

I for sure wouldn't want to use this while training on a normal tube. Can't imagine having to unscrew this thing (and likely put it in my pocket) just to change a flat. I'm sure as hell not reapplying plumbers tape and using any tools to thread this thing back on a spare tube with a removable core on the side of the road.

Hello Tony5 and All,

Neat but too big ... It is not so much the price that causes me to hesitate buying .... but rather size and weight.

I do not know how to make it .... yet .... but channeling on the pocket size tire pressure gauges that have a graduated part that extends to indicate pressure ...




Price $2.27



Perhaps this design with the little graduated part that is visible located in a streamlined clear valve extender weighing only a couple of grams.

It could be colored green in the acceptable pressure area to make it quick reading ... and so you would not have to stop to read the tire pressure ..... for on the fly pressure data ..... the little pressure data stick could cover a small hole when in the acceptable pressure range ..... when out of acceptable range the little uncovered hole would whistle .... giving you an audible warning of low tire pressure.

Simple, cheap, effective.

Another solution would be a very light graphene cartridge filled with Nitrogen located inside a self sealing tubeless tire with a pressure sensing valve that released the Nitrogen any time the pressure in the tire fell below a certain level. You do not really need to know the pressure .... you just want the pressure to automatically remain optimum.

Or better yet .... a tire with good Crr elastic properties that did not require inflation and would not flat ..... and throw away pumps, tire gauges, self sealing fluids, patching kits, etc.

Any thoughts?

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Cheers, Neal

+1 mph Faster

What would be cool is the combination of both. You can loose a race for not taking into account the effect on real tyre pressure of weight loss due to sweating, farting or snorting. A must have!

https://www.dcrainmaker.com/...pressure-sensor.html

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Make Inside Out Sports your next online tri shop! http://www.insideoutsports.com/

I'll bet you this was pretty easy for Quarq to develop. They already have their ShockWiz device for MTB suspension tuning which basically does the same thing. That is measuring air pressures and transmitting them to a phone. The form of it even looks similar. I'll bet since they already had the tech it was straightforward for them to make what is arguably a simpler device, so there wasn't much cost to them. Agree with DCrainmaker that $99 is probably about the right price, but I'll be they don't have to sell a ton of these to make it worth their while.

I see it being hugely valuable for gravel racing where you often start on the road - and want higher pressure - and then want to drop it down once you get on the gravel and enduro/grinduro events where you may want to change pressure between segments.

Peloton Gravel Mob up in Ojai was exactly this type of event. You want higher pressure for the first half but definitely lower for Sisar Canyon, which is quite technical, in the back half.

I should have one coming for an upcoming series on gravel equipment that I'm doing, and this is my proposed use case. Silca's BLE version of the Tattico fills a similar role IMO.

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"Non est ad astra mollis e terris via." - Seneca | rappstar.com | FB - Rappstar Racing | IG - @jordanrapp

Probably right. You can get a 4 tire Bluetooth system for your car on Amazon for $50 . . . . . Wireless tire pressure monitoring technology is a pretty mundane thing at this point.

I like the product also, but are you suggesting people are going to get off their bike and "air down" once they hit a rougher section on the course? I've done quite a bit of gravel racing, and I can't think of a race where that would have been a good idea! The lead group isn't going to wait for me. Or maybe we all agree to stop so we can adjust our tire pressure together and call it the air down neutral zone!

Obviously the ultimate would be to have the ability to adjust your pressure during the ride and have an accurate readout. I think there was a company trying to get a product like this going last year.

I do approximately 150 hours of fatbiking on snow during the winter on mainly unmaintained single track, so I personally could see a use for this for fatbiking! It's amazing how much the snow can vary on different trails during the same ride - not to mention if you need to ride on pavement for portions of the ride. Depending on conditions, it's not uncommon for me to adjust my pressure 3 or 4 times. It would be nice to know what the pressure actually is while you are out there. The actual pressure out riding will also be significantly different if you air your tires up in your house at 20 Celsius and then ride at -15 Celsius. I wonder if this product has a temperature limit - it's not uncommon for me to ride at -25 Celsius.

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In my - albeit limited - experience, the front group typically has had a pee break of some kind that typically coincided with a spot where you could also get some aid and possibly air down/up. And certainly for more casual riders, I think taking a quick break to air down is entirely possible.

Likewise, I can also see some value if you had a slow leaker and you were wondering if you needed to air up, this would tell you whether or not you were clear to keep rolling or not...

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"Non est ad astra mollis e terris via." - Seneca | rappstar.com | FB - Rappstar Racing | IG - @jordanrapp

I haven't encountered the pee break zone or aid station stop in any of the races I've done - though I haven't done any long ones - all under 100km. For sure, the longer events would likely have those natural breaks to allow small pressure adjustments without any consequence.

Cool product nonetheless.

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Yup...I can see it being valuable in those situations where there are big differences in terrain and "ideal" pressure could be 20% higher or lower depending on the segment.

SRAM has a much bigger presence in off road and gravel so I think it's safe to assume that while this device can be used for road, it's not the intended audience.

I see this being pretty useful for R&D or pro teams. One use case is Roubaix - you identify the pressure you want for the cobbled sections. You can use these wigets to gather data on how much overinflation you need to be at a desired pressure by the time you get there several hours into the race.

For us mortals, especially on the MTB side maybe it's a nice thing to have for dialing in your setup, similar to the ShockWiz. That I see as a really useful tool. I probably wouldn't spend the money on that (or the tire gauges) but a shop down the street rents out the ShockWiz for $40 a weekend. That to me is a great value. Maybe there is a rental market for the tire gauges as well. Who knows.

Price is definitely too high. Would be better if it was closer to the form factor of the Garmin product that has existed for years that fits the old schrader valve style, which used ANT.

https://buy.garmin.com/en-US/US/p/131744

Low pressure warning might be good for safety.

do approximately 150 hours of fatbiking on snow during the winter on mainly unmaintained single track, so I personally could see a use for this for fatbiking!

You're the 1st person to mention fatbiking in this thread, but yeah, I was thinking along the same lines. But I wonder if the resolution and range are adequate for fatbiking. You'd need something like .1 psi resolution at 1-12 psi; the SRAM specs don't address this from what I've seen.

Tire pressure feedback would be awesome to have on the fatbike. I've done races (like this year's WM100) where I nailed the tire pressure and dropped better riders on downhills; conversely there've been times when I flailed and weaker riders rode away. And on any given day the snow is different and pressure needs to be different too.

I try to monitor my tire pressure fairly closely, and even have a 0-15psi Meisner gauge, but having a constant readout on the bars would be really cool.

Hi Jesse from Quarq here- happy to help answer any questions but given the general theme of this thread so far here are a few things we are hoping to address with TyreWiz-

1. Quarq believes what is measured can improve. Sure tire pressure isn't rocket science but it does require a large number of variables to be considered.
2. Given the variables that impact tire pressure and the role it plays in compliance, rolling resistance and safety it only seems logical that we'd have an accurate, dependable and always on means for measuring such an important variable in the equation. Sure we all have our trusty pump in the garage but our testing and my previous experience as a product manager for Bontrager pumps puts more than a shadow of doubt on accuracy. Most external gauges aren't much better.
3. While detecting slow leaks and changes over time is certainly a benefit of the product we also feel that having an accurate sensor available will lead to new insights about optimal set ups and more importantly confidence that the number that feels right on the road or trail is repeatable no matter what pump or gauge you use.

Hi Jesse

Thanks for your input. I laughed when I saw this because I’ve been meaning to make something like this for my own evil means for a while now. Needless to say I’m getting one ASAP. This will be really helpful for our aero testing and some other plans.

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Developing aero, fit and other fun stuff at Red is Faster

How much would tire pressure change from say 70 degrees to 95 degrees?

Rule of thumb is about 1 psi for every 10 degrees. For a road/TT bike, that's nothing. For gravel or MTB, it's not much, but it is something. As Josh has explained in the Marginal Gains podcast, a few PSI in a race on cobbles is the difference between the fastest possible setup and two broken rims.

For MTB and Gravel, I think the TyreWiz is somewhat useful. On training rides or preriding a course, you can stop and go as much as you want to inflate with a handpump or deflate until you find the pressure you really like. You can also do this with a portable gauge, if you want to save about $175. I really like my accu-gage, and it reads within about 1psi of my Silca Superpista Digital

On race day, a small puncture is often sealed with a good sealant, but often times some pressure is lost. Maybe I'm not attentive enough, but often times i don't even notice when this happens. I just keep riding. The Epic in Missouri a few weeks ago was an example of this. I set my pressures before the race. In the second half of the race, I felt my rim hit rocks a few times. I told myself that next time i need to start with a couple PSI more. However, after the race I checked my pressures again, and they were about 10 psi lower than when I started. I must have had a small puncture at some point. I was lucky I didn't snake bite my tire and lose all the air, and a lot of time. If I had the tyrewiz, i would have known i was 10 psi down. While riding i could have gotten my CO2 ready, then hopped off my bike, gave it a quick shot of air, and chased back on in almost no time at all.

It's a niche product. If you don't understand why somebody would buy it, then it's probably not for you. For road riding and triathlon, i think it's near pointless. For offroad use, it has a purpose...you just need to justify if the data is worth it to you.

Here's the 'post' data. Not valuable.



You can set up a data field on your device to monitor real time psi in both tires. I suppose that may be useful if you're getting jarred around and want to let a little out or add a little in to stop smacking your rims. To me, I would rather have 50 grams of SKS Airchecker (and $175) in my pocket than 20 grams of TyreWiz on my rims. The Wizs were given to me as a gift though, so I use them.

I made a little chart last year of their reading vs. two popular digital hand gauges and a popular analog gauge over a few different pressures on gravel, mountain, and fat tires. The one thing that annoys me the most, is that one of the Wizs seems to be consistently 0.5 psi off of the other based on comparing them two the three gauges. I keep it on the front because that's probably less critical to being lower for gravel. Other than being a talking point at rest stops, their only use is for letting out some air into a gravel ride with a longer paved start. I would not recommend them at $200 or probably even half of that. A handheld works just as well and is easier to use over a range of bikes.

How about a saddle that detects how much you clench your butt cheeks so you can see later how scared you were on that 50 mph descent?

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