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| That's a looooong valve stem! |
Last week I introduced the Aeron TPU tubes I have on test and review here. That introduction can be read by clicking THIS LINK.
In this update I am going to cover the installation process and my first impressions of these tubes so far. So, let's dive right in!
Installation Process:
Aeron advises the user to put in about 3-4psi of air pressure in the tube before installing it. This is to give the tube shape, and to prevent the installer from folding or pinching the tube during the install. It is a basic technique for installing any tube. What you do not want to do is over inflate the TPU tube!
Another thing to note here is that Aeron made this tube to work with 650B/27.5" AND 700c wheels. This means that the tube is slightly too small in diameter for 700c upon installation. You have to stretch the tube over the rim to mount it, which might be tricky if you haven't dealt with this sort of situation before. We 29"er guys from way back know the drill as we had to use 26" tubes as spares at one point.
While Aeron does not advise putting talc powder in the tire, it does not recommend against it, and this is something I do with any tube. It helps the tube move against the inner casing of the tire and helps prevent chafing. It could possibly lower rolling resistance a bit as well, but I have no solid evidence of this being the case.
I installed the tubes using different sized tires. Aeron recommends these tubes for anything from 32mm to 52mm in width. I have a 47mm wide Teravail Cannonball and a 700 x 2.25" (claimed) WTB Nineline tire in use with the Aeron tubes now. The WTB Nineline is actually 51mm in width, so just within the recommendation from Aeron.
I found that the Aeron tubes in my tires were a bit of a chore to get set into place properly. One would like to see the bead chafer strip peeking out above the rim's edge, (as seen in the image here) all the way around the wheel. But I had a devil of a time getting my tires, especially the Nineline, to set where they belong.
This is a common occurrence with butyl tube installs as well. A little lube on the tire beads can help with this issue. Older tires are also more prone to doing this, and so my old Nineline was probably more to blame than the tube was in this instance.
Ride Impressions:
I have to play around with air pressures yet. Initial test rides are going fine though. Nothing really unusual to report and so far, this is a good thing.
Overall Impressions:
The installation was what I expected, and besides the issues with getting the tires to sit just right, I was fine with how the installation went. I should note here I used no levers or other tools to mount the TPU tubes. I would strongly recommend a no-tool installation since this eliminates damage which can be incurred by using levers.
My SILCA pump head worked great with the threaded top portion of the valve stem. This feature is a little noticed thing until you run across a tube with a smooth, non-threaded valve stem and find your pump head blowing off as you inflate the tire.
There was a comment made in the previous post on these Aeron tubes concerning the length of the valve stems. This longer stem length and the smaller diameter issue are connected, in my opinion. Aeron is trying to make a TPU tube which will work across a wide range of use cases. This way they do not have to make several variants to cover specific use cases. This includes valve stem length. If the Aeron valve stem clears a deep dish rim, it will clear a lot of other, less deep profile rims.
I'm not necessarily a fan of this approach, but I understand it from a business/manufacturing viewpoint. As long as the stem doesn't get knocked around, (and based upon my experiences on gravel, it shouldn't) I'm fine with this decision by Aeron functionally. Aesthetically it looks goofy.
While this is not directly related to the tubes I have decided to swap test bikes based upon the minimal tire clearance in the rear of the Noble GX5. It was only rated for 40mm tires, so a 47mm is really pushing things!
So, I think we are on the road to getting some real riding done with these tubes soon. That is, if it would quit raining buckets and the lightning would cease!
Stay tuned....
PSA: Wednesday will kick off the press releases embargo lifts for Sea Otter news. Look for several articles to go live at oddball times Wednesday and Thursday. Much of this week's FN&V will be Sea Otter news as well.
























