Enve pressure relief nut saves you from blowing up your rims! – bikerumor gas or electricity more expensive


Did you ever imagine that there was a real risk, when you pumped up your road tubeless setup to your tire’s max PSI, that you could delaminate your carbon rim o goshi judo? Well, ENVE explains how an imperfect (and quite common) tubeless setup can actually pressurize the internal cavity of your rim, exposing it to high internal pressures that rims, especially lightweight carbon rims, were never designed to handle. So they made these unique little Pressure Relief Valve Nuts as a simple, low-cost solution to safeguard your wheels.

The general thinking behind ENVE’s Pressure Relief Valve Nut is that any failure in the tubeless setup of your rim can allow air pressure to build up in the inner chamber of the rim. That will happen if there is an imperfect seal between the rim bed tubeless rim tape, like if a tight tire scrapes the tape gas 2 chainz off the rim shoulder (or you use tape too narrow for your rim). Basically any damage the tape while installing a tire can allow air to pass through. An imperfect seal between electricity production the rubber gasket end of the tubeless valve stem the valve hole can have the same result, and those holes are often just poked into the tape with the valve itself.

But since many carbon rims have an especially tight connection between nipple rim, and often no other opening in the rim (some rims have drain holes that gas or electricity for heating would probably alleviate the issue), if pressure escapes from the tire through the rim bed, it can become trapped inside the rim. Then when you pump that new road tubeless tire to its maximum pressure over 100psi, the rim can become internally pressurized at that same pressure. And ENVE says that is something rim producers have not designed their gas stations in texas products to withstand. Why is this coming to light now?

First, at tubeless mountain bike tire pressures, the potential pressure inside a rim was relatively low and unlikely to cause any damage. But now as more road riders adopt tubeless, and more DIY setups are installed, there just is greater risk of pressurizing rims. And since we all keep demanding lighter road tubeless rims, especially in deeper carbon wheels, rim producers have been pushing the envelope of the material. ENVE even says that most standard weep holes drilled in the side of road rims aren’t big enough to let air out quickly enough, and can still result in dangerous internal pressures.

So when you expose a lightweight rim to high internal pressures that it wasn’t designed to handle, you open up the possibility of delaminating the carbon structure of the rim. In extreme cases, you can separate electricity year 6 the rim sidewall from the tire bed (many carbon rims are to some degree molded in multiple parts) or even create internal damage not visible from the outside while still weakening the rim. What is ENVE’s solution?

Looking to solve the problem, Enve developed a safer tubeless valve and gas zyklon b locknut that ditches the O-ring airtight seal we are used to. Four fluted openings in the inner threads of the nut provide additional air gaps around the valve stem so air can escape the rim cavity if there is a problem with your tubeless setup. It may sound like the problem is air leaking around your valve, but tightening the valve down will still allow the air electricity word search printable to escape, which is a sign you may need to redo your tubeless tape.

Hi Bre, Much respect on your frame building. I’ve seen the holes you reference on both aluminum and carbon rims, and was always under the impression that they were weep holes, intended to allow water that worked it’s way down through the electricity song lyrics spoke holes. I agree with you that water would be much slower to escape than air, due to its viscosity, but I don’t think it would be entering the rim cavity at anywhere near the rate that the air would either, and certainly wouldn’t be achieving this sort of pressurized condition. One is a film of water being slowly drawn down through largely obstructed spoke and gas 99 cents a litre valve holes, the other is highly pressurized air suddenly escaping through a hole/s of much greater size. In other words, I am not sure that weep holes, of the typically 1-2mm size, would negate this issue. Having said that, this valve nuts sure don’t seem like they allow a lot of airflow either, so if Enve has really done their homework, and these nuts are sufficient, then maybe you are right.