33g Inner Tube - Ridenow TPU
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The spirit of this board is to compile and organize wheels and tires related discussions.
If a new wheel tech is released, (say for example, TPU tubes, a brand new tire, or a new rim standard), feel free to start the discussion in the popular "Road". Your topic will eventually be moved here!
The spirit of this board is to compile and organize wheels and tires related discussions.
If a new wheel tech is released, (say for example, TPU tubes, a brand new tire, or a new rim standard), feel free to start the discussion in the popular "Road". Your topic will eventually be moved here!
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- Posts: 279
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This 24g tube and 160g Panarace Gillar is a killing combo for hillclimbing, just under 190g for the system with decent puncture protection.
2018 Cannondale SuperSix EVO 2 rim size 56 (raw stripped) 6.8kg
2014 Bridgestone Anchor CX6 Equipe size 55 (cyclocross) 9.6kg
2014 Bridgestone Anchor CX6 Equipe size 55 (cyclocross) 9.6kg
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I just fitted these, I was very carefull inflating but it was straight forward. Will be riding them on sunday. First time with these and also Vittoria Corsa.stevec1975 wrote: ↑Mon Feb 06, 2023 1:10 pmThe SL version of the Ridenow tubes comes in pretty accurate weight wise. this is with a 65mm Valve
I bought some of the Pirelli TPU tubes through my LBS a couple of months ago and thought they looked good to use as spares, although I planned to replace them with butyl (being a cheap retired accountant) when I got home. I used one on a flat a couple of weeks ago and it worked great and was fairly easy to refold up into a small ball after I replaced it with butyl. The ~$40 cost per tube meant that I'd just use these as spares, not for regular rides.
I'd read these positive comments about Ridenow so decided to order some. Ten of the regular ones cost me $94.78 Canadian so about the same price as butyl tubes here. Delivery was about a week so OK there. Being a bit cautious, I decided to put air in one to see if it held before packing them for a trip to Mallorca in a couple of weeks. Started putting air in the first tube and at about 20 PSI it bulged opposite the valve stem. Tried four more tubes and they all bulged near the valve stem. Put in more air and the bulge just grew. Obviously if they'd been inside a tire, there would have been nowhere for a bulge to form so maybe this wasn't a good test. So, the five I tried have all gone in the garbage but I still have the other five. Has anyone performed the same test with the same or a different result? Did I just get a bad batch?
I'd read these positive comments about Ridenow so decided to order some. Ten of the regular ones cost me $94.78 Canadian so about the same price as butyl tubes here. Delivery was about a week so OK there. Being a bit cautious, I decided to put air in one to see if it held before packing them for a trip to Mallorca in a couple of weeks. Started putting air in the first tube and at about 20 PSI it bulged opposite the valve stem. Tried four more tubes and they all bulged near the valve stem. Put in more air and the bulge just grew. Obviously if they'd been inside a tire, there would have been nowhere for a bulge to form so maybe this wasn't a good test. So, the five I tried have all gone in the garbage but I still have the other five. Has anyone performed the same test with the same or a different result? Did I just get a bad batch?
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- Joined: Mon Feb 20, 2023 2:43 pm
I think you're only supposed to inflate them to maximum of 6 psi when not inside a tire, as stated in the item description on Ali Express. They even have a graphic of the bulge opposite the valve stem:c50jim wrote: ↑Thu Mar 30, 2023 11:21 pmI bought some of the Pirelli TPU tubes through my LBS a couple of months ago and thought they looked good to use as spares, although I planned to replace them with butyl (being a cheap retired accountant) when I got home. I used one on a flat a couple of weeks ago and it worked great and was fairly easy to refold up into a small ball after I replaced it with butyl. The ~$40 cost per tube meant that I'd just use these as spares, not for regular rides.
I'd read these positive comments about Ridenow so decided to order some. Ten of the regular ones cost me $94.78 Canadian so about the same price as butyl tubes here. Delivery was about a week so OK there. Being a bit cautious, I decided to put air in one to see if it held before packing them for a trip to Mallorca in a couple of weeks. Started putting air in the first tube and at about 20 PSI it bulged opposite the valve stem. Tried four more tubes and they all bulged near the valve stem. Put in more air and the bulge just grew. Obviously if they'd been inside a tire, there would have been nowhere for a bulge to form so maybe this wasn't a good test. So, the five I tried have all gone in the garbage but I still have the other five. Has anyone performed the same test with the same or a different result? Did I just get a bad batch?
https://www.aliexpress.com/item/1005004788489420.html
Bulging is 100% normal for inner tubes made of very flexible material. Tires can't be perfectly symmetrical in thickness throughout, to the thinnest part eventually bulges. Latex tires do the same. Think of it in steps. Thinnest part bulges a tiny bit, making it even thinner. Add more air and that even thinner part will stretch even faster. Eventually you get a runaway.c50jim wrote: ↑Thu Mar 30, 2023 11:21 pmI bought some of the Pirelli TPU tubes through my LBS a couple of months ago and thought they looked good to use as spares, although I planned to replace them with butyl (being a cheap retired accountant) when I got home. I used one on a flat a couple of weeks ago and it worked great and was fairly easy to refold up into a small ball after I replaced it with butyl. The ~$40 cost per tube meant that I'd just use these as spares, not for regular rides.
I'd read these positive comments about Ridenow so decided to order some. Ten of the regular ones cost me $94.78 Canadian so about the same price as butyl tubes here. Delivery was about a week so OK there. Being a bit cautious, I decided to put air in one to see if it held before packing them for a trip to Mallorca in a couple of weeks. Started putting air in the first tube and at about 20 PSI it bulged opposite the valve stem. Tried four more tubes and they all bulged near the valve stem. Put in more air and the bulge just grew. Obviously if they'd been inside a tire, there would have been nowhere for a bulge to form so maybe this wasn't a good test. So, the five I tried have all gone in the garbage but I still have the other five. Has anyone performed the same test with the same or a different result? Did I just get a bad batch?
This is why you don't pressure it up outside of a tire. You've just damaged your TPU tires for no reason. There was nothing wrong with them until you did that.
This was my setup last year but with Revoloop. Surprisingly puncture resistant, except for the tiny glass pieces when riding through the city. This combo felt good even in the flats for me, which made me a fan of Panaracer road tires.charirider wrote: ↑Thu Mar 16, 2023 1:26 pmThis 24g tube and 160g Panarace Gillar is a killing combo for hillclimbing, just under 190g for the system with decent puncture protection.
- eucalyptus
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Because you can still inflate the tube enough to not wreck it. If it deflates slow or quick indicates a leak 20 psi is wrecking the tube.
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Looks like the RideNow tube only has 0.7 watts less rolling resistance than Schwalbe SV20 Butyl tubes in the test on Bicycle Rolling Resisiance:
https://www.bicyclerollingresistance.co ... nner-tubes
As for reasons not to switch, I've not tried them myself so I can't comment on durability or the how effective the repair kits are. I am tempted to buy a couple as spares for taking with me on long rides. I ride tubeless myself, but always take a spare tube for un-pluggable rips in the tire.
Every material that has a low threshold to the point where Hooke's law ends and the added force required for adding more elongation starts shrinking the more force/elongation you add (limit of proportionality) will bulge. TPU and latex are that kind of material. If they wouldn't bulge they would be fakes made from some different material than claimed.c50jim wrote: ↑Thu Mar 30, 2023 11:21 pmI bought some of the Pirelli TPU tubes through my LBS a couple of months ago and thought they looked good to use as spares, although I planned to replace them with butyl (being a cheap retired accountant) when I got home. I used one on a flat a couple of weeks ago and it worked great and was fairly easy to refold up into a small ball after I replaced it with butyl. The ~$40 cost per tube meant that I'd just use these as spares, not for regular rides.
I'd read these positive comments about Ridenow so decided to order some. Ten of the regular ones cost me $94.78 Canadian so about the same price as butyl tubes here. Delivery was about a week so OK there. Being a bit cautious, I decided to put air in one to see if it held before packing them for a trip to Mallorca in a couple of weeks. Started putting air in the first tube and at about 20 PSI it bulged opposite the valve stem. Tried four more tubes and they all bulged near the valve stem. Put in more air and the bulge just grew. Obviously if they'd been inside a tire, there would have been nowhere for a bulge to form so maybe this wasn't a good test. So, the five I tried have all gone in the garbage but I still have the other five. Has anyone performed the same test with the same or a different result? Did I just get a bad batch?
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I have install Pirelli TPU on a set of wheels and it retains pressure much much better than latex.
You are not suppose to inflate them outside the tire! They were fine… if they still have stretch once you remove all the pressure they not usable anymore, you plastically deformed them.c50jim wrote: Started putting air in the first tube and at about 20 PSI it bulged opposite the valve stem. Tried four more tubes and they all bulged near the valve stem. […] Did I just get a bad batch?
TPU can’t stretch as much as latex. Not a problem when the tire casing maintain their shape.
As far as RR, the material stiffness is compensated by how thin they can be. On very good roads it’s a bit slower than latex and seems that the worse the road, the more vibrations it transmit then increase impedance losses.Lelandjt wrote:Do these have more rolling resistance than Schwalbe's ultralight butyl tubes? Any reason besides cost for me not to switch?
- zappafile123
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Lol I'd be feeling pretty stupid if I destroyed 5 tubes out of blatant ignorance and then posted that fact on a forum for people to immediately think 'this guy... needs help'.WeeniestWeigh wrote: ↑Thu Mar 30, 2023 11:42 pmI think you're only supposed to inflate them to maximum of 6 psi when not inside a tire, as stated in the item description on Ali Express. They even have a graphic of the bulge opposite the valve stem:c50jim wrote: ↑Thu Mar 30, 2023 11:21 pmI bought some of the Pirelli TPU tubes through my LBS a couple of months ago and thought they looked good to use as spares, although I planned to replace them with butyl (being a cheap retired accountant) when I got home. I used one on a flat a couple of weeks ago and it worked great and was fairly easy to refold up into a small ball after I replaced it with butyl. The ~$40 cost per tube meant that I'd just use these as spares, not for regular rides.
I'd read these positive comments about Ridenow so decided to order some. Ten of the regular ones cost me $94.78 Canadian so about the same price as butyl tubes here. Delivery was about a week so OK there. Being a bit cautious, I decided to put air in one to see if it held before packing them for a trip to Mallorca in a couple of weeks. Started putting air in the first tube and at about 20 PSI it bulged opposite the valve stem. Tried four more tubes and they all bulged near the valve stem. Put in more air and the bulge just grew. Obviously if they'd been inside a tire, there would have been nowhere for a bulge to form so maybe this wasn't a good test. So, the five I tried have all gone in the garbage but I still have the other five. Has anyone performed the same test with the same or a different result? Did I just get a bad batch?
https://www.aliexpress.com/item/1005004788489420.html
Mini review
Anyway, I just transitioned to RN from Challenge Latex. So far so good! They lose about 5-10 PSI a day instead of 20 which does make a big difference. 80mm valve tubes weighed in at 36 g. I cannot tell the difference between the RN and Latex in terms of suppleness/speed. They feel just as fast.
This is just a suspicion at this point, but there may be a safety downside with these tubes related to how they deflate when punctured. Basically it seems as though there is an increased risk of catastrophic failure where the tube deflates almost instantaneously when punctured. Might be something to do with the stiffness of the material allowing punctures to 'stay open' rather than flap open and closed due to the flexibility of the material like latex/butyl. I've flatted once (cause my tires were at the end of their life) and complete deflation was almost immediate. N=1 so take the above with a fist full of salt. I'll report back if that was a once off or if the tubes really do deflate faster.
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