Publishes its ETRTO pair, and brings its own levers
Ultraverse 26" butyl, ETRTO 45/57-559, Schrader 32 mm (1.26 in)
Two thick-walled 26-inch butyl tubes with a published ETRTO range of 45/57-559, a 32 mm (1.26 in) Schrader valve and two tire levers.
What you are getting
Two 26-inch butyl tubes with ETRTO 45/57-559, a 32 mm (1.26 in) Schrader (AV32) valve, and two tire levers. 472 g (16.6 oz) the pair, about 236 g (8.3 oz) a tube. $16.95.
It publishes the ETRTO, which only two listings here do
“Designed to fit 26×1.75, 26×1.90, 26×1.95, 26×2.0, 26×2.10, 26×2.125 (45/57-559).”
Six inch sizes and then, in brackets, the pair that actually settles it: tire widths of 45 to 57 mm (1.77 to 2.24 in) on a 559 mm (22 in) rim. The buying advice on this page is to read those two numbers off the tire sidewall, and this is one of only two listings in the American survey for this shelf that supplies them — the other is the Continental road tube.
The Bell and Slime tubes on this page cover the same wheels and give inch sizes only.
236 g (8.3 oz) a tube, which is heavy and deliberate
“Thick butyl rubber body withstands friction, heat, and road wear better than standard tubes.”
For comparison: the Bell 26-inch tube is 136 g (4.8 oz) on the shipping record, the YunSCM 20-inch is about 160 g (5.6 oz), the Continental road tube about 100 g (3.5 oz). At 236 g (8.3 oz) this is the heaviest plain tube in the group — only the Slime self-sealing tube is heavier, and that is sealant rather than rubber.
A thick-walled tube resists pinch flats and rolls slightly worse. On a mountain or cruiser wheel, that is the right side of the trade.
Thirty-two millimeters of Schrader, and what that excludes
A Schrader valve is the car-tire fitting: it inflates at a garage and takes any standard pump without an adapter. Thirty-two millimeters is short — fine for the box-section rims a 26-inch mountain or cruiser wheel uses, and not enough for a deep aero rim, which would not take a 26-inch tire anyway.
The shelf intro names Presta, Schrader and Dunlop. This group has four Schrader tubes, two Presta and no Dunlop; the Alphatrail tube already published on this shelf is the Dunlop one.
The levers matter more than they look
Two tire levers in the box, on a tube for the wheels most likely to be fixed at the roadside. The puncture repair shelf on this site sells levers separately, and a wide mountain tire on a tight rim is the case where you need two and not one.
Where the listing stops being specific
“Excellent shock absorption… absorbs vibration and reduces impact from bumps.” A tube at 2–3 bar inside a 2.1-inch tire contributes almost nothing to comfort compared with the tire itself; the air volume does the work.
And the last bullet is a satisfaction guarantee, which is about the seller.
What is not published
No wall thickness in millimeters, no pressure range (correctly left to the tire), and no weight per tube — 472 g is the pair, levers included.
Availability
Read on the day this page was built: $17 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-06. The live price is at the top of the page.
