2-Pack SPINGO Inner Tube MTB 26inch / 27.5inch / 29inch TPU Inner Tubes for 1.5-2.1/2.2-2.5 MTB TPU Bike Tube with 48mm Schrader/Presta Valves Lightweight Mountain Bike Spare Tire

Much more compact, lighter and so far so good but they went on my 26r 2.4 Holy Rollers for street rides and have held up so far. Small drops, Nina kicker ramp and the pump track but my psi is ranging from 40-50 on some old Mavic Crossmaxs. Went ahead and bought some for my 29r which sees dirt and trails so that’ll be the true since I got tired of messing with tubeless clogging up all my wheel sets. Not to mention they cost the same as a stinky innertube from the bike shop.

I've been building up mountain bikes for longer than you can imagine. Going tubeless with it's cost, need to rim tape to perfection, frequency of adding additional sealant, in my humble opinion is now in question. I added these two TPU Tubes to a pair of ENVE M630 Rims because I could not seal the wheels with rim tape. I took to the gnarly trails in my local area after installing these TPU Tubes and I may never go back to tire sealants/ tubeless setups. These TPU Tubes from Spingo are like discovering cell phones after using landlines. I can't be more impressed with having made the decision to use these on my unsealable wheels. I talcum powdered the wheels after applying rim tape, followed the recommended 5psi inflate, installed and rode the wheelset on some rocky, rooted, challenging local trails, and am so impressed. I have no idea how long these will continue to perform as I experienced recently, but I may never go through the process of setting up tubeless tires again when these TPU Tubes are so easy to utilize. I've had no air leakage, no need to add air. This Spingo brand has thicker walls than Ride now, is a better quality TPU Tube and its functionality has outperformed my expectations. Save yourself the hassle of tubeless sealant setup when these Spingo TPU Tubes are so much easier. We learn something new everyday.

very cheap product .i had a flat out on a trail install this tube and started to inflate it and the stem broke off. very fragile.its made of plastic.you get what you pay for.

This review is specific to cross-country mountain bike use, in the Colombian Andes, and this comparative review has been left for the four brands I tried. I've been experimenting with different brands of TPU tubes for the last six months, out of curiosity. Firstly, the upside of TPU tubes, over regular butyl tubes, is more than I expected, with the considerable weight saving around the rims making a noticable difference to the ride feel, plus the extra weight saving of not having to carry a butyl spare. The downside of the TPUs is the reliability of the tubes and the valves. I have purchased four different brands: RideNow (pink - $), Spingo (turquoise - $$), ThinVik (yellow - $$) and TuboLito (orange - $$$$) and I always ensured I got the MTB versions. I ride at around 20-22 psi but I always inflate to 50 to seat the tyre correctly before reducing. I started with a RideNow tube at the rear and a Spingo up front. The RideNow tube, which is the cheapest, lightest and thinnest of the four brands, failed over night even prior to riding it. I immediately binned it and never used the 2nd tube that came in the pack. I replaced it with another Spingo, with which I have had enough success to warrant purchasing more. I've gotten through 3 or 4 of these over the months, some lasting longer than others. All of them have eventually had small piercing punctures, but no pinch-flats, which was the most frequent cause of flats with butyl tubes for me. The plastic valves, however, are very delicate and I managed to snap two just removing the pump head. I also tried the really expensive TuboLito MTB tubes, at a whopping $27 each, thinking that they must be better, right? They certainly are thicker than the others and they feel sturdy, but I've gotten through three of them, all getting punctures, and they did not perform any better than the Spingos at less than half the price. My final attempt was with ThinVik, which I tried primarily because they have a metal valve and a nice metal cap. So far these have been the best performing tubes of the four and have lasted the longest. I have had punctures but they come with TPU patches which seem to work well. The only issue I had was with one tube that ballooned in one spot on the 5 psi pre-installation-inflation which caused a bump in the tyre so I had to bin it. It's been an expensive experiment but I'm pleased with the result. My recommendation out of these four brands, therefore, is the yellow ThinViks. I have left this same review under each of the 4 brands mentioned here. Happy trails!

Bought the schradar valve model to replace a punctured butyl tube. Installed both since I they are supposed to be lighter and have less rolling resistance. I went on three rides. Everything was fine after the first two. After the third, the next morning the tire was flat. I tried pumping it back up, but it wouldn’t hold air. I reached out to the company and they sent a new set within four days. I can’t find a puncture, so am unsure why it won’t hold air, maybe the valve? Unsure about the product longevity, but awesome customer service and the price is right, so I would rate these tubes good for the price.

These inner tubes are about a third of the weight of butyl tubes. They also package into a smaller profile than butyl tubes, making it easy to carry a spare. I was initially skeptical of the TPU tubes because several online comments and videos claimed that they lost air pressure faster than butyl tubes...I have not seen a difference between these TPU tubes and butyl tubes in that regard.

Super lightweight!

These tubes don’t seem to hold their air very long. Sometimes they feel completely flat. I air them up and they’ll be perfectly fine all day, but coming back to it after a few days of sitting and they’ve lost a significant amount of air. They are light and save a lot on weight and save A LOT on space if you are packing them as a back up, but that seems to be their limit as far as usage goes. They are a great back up tube, but that’s about it. I wouldn’t rely on them as a daily because you’d have to be airing up your tires almost every other day.