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YunSCM Bike Inner Tubes Review: Reliable spares for 26-inch wheels

YunSCM 2-Pack 26" Bike Inner Tubes 26x1.75/2.125 (ETRTO:50/57-559 )AV32mm Schrader Valve 26" Bicycle Tyre Tubes Compatible with 26x1.75 26x1.90 26x1.95 26x2.0 26x2.10 26x2.125 Bike Tyre Tubes
4.7
[Wide Size Compatibility]  Fits 26x1.75–26x2.125 (ETRTO 47–57-559) road and mountain bike tires.
[Premium Butyl Construction]  High-quality butyl rubber resists ozone, aging, and provides excellent sealing.
[Comfortable Shock Absorption]  Absorbs bumps for a smoother, safer ride on uneven roads.
[Quick, Hassle-Free Installation]  Easy to replace in minutes; follow inflation guide for proper airing.
[180-Day Quality Guarantee]  180-day support with responsive service and refund or replacement on issues.
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Cycling spares designed for everyday riders who need dependable replacements for 26-inch wheels. Comfort and peace of mind on commutes and weekend trails come from simple, robust construction with YunSCM Bike Inner Tubes. Are these the sensible spares to keep in a saddlebag?

⚡ At a Glance
  • Air Retention: Premium butyl rubber gives reliable sealing, ozone resistance and reduced slow leaks
  • Best for: Commuters and recreational cyclists using 26-inch wheels who want quick repairs
  • Not ideal for: Bikes that require Presta valves or sizes outside the listed 26-inch ETRTO range

Made from butyl rubber with strong sealing and ozone resistance. Compatible with a range of 26x tyre widths and fitted with an AV32mm Schrader valve.


Long-lasting pressure retention – thanks to premium butyl rubber

Butyl rubber delivers superior sealing performance and resists ozone and ageing, helping to limit slow leaks. The compound also offers electrical insulation and heat resistance for daily use.

Tyres hold pressure for longer between pumps, useful on longer rides or regular commutes according to user feedback.

More comfortable rides on rough surfaces – with shock-absorbing construction

The butyl compound absorbs impacts and stands up to wear and tear, helping to reduce vibration transmitted through the wheel. Heat resistance helps maintain performance under sustained use.

Riding over uneven roads feels less jarring and gives a steadier ride for leisure and trail use.

Fast, DIY replacements – with AV32mm Schrader valve and broad fit range

An AV32mm Schrader valve works with common pumps and tools, and the tubes are matched to multiple 26x tyre widths listed by ETRTO. A small pre-inflation step helps ensure correct alignment before final seating.

Home or roadside changes are straightforward, saving time when swapping tubes in a saddlebag repair.

✨ The 4 Key Reasons for YunSCM Bike Inner Tubes
  1. Wide size compatibility – Fits many 26x tyre widths for flexible spares
  2. Premium butyl construction – Durable material resists ozone and ageing effectively
  3. 32mm Schrader valve – Works with standard pumps for quick inflation
  4. Two-pack convenience – Keeps a spare ready after a roadside repair
📋 Technical Details at a Glance
  • Category: Bike inner tube
  • Valve type: AV32mm Schrader valve
  • Material: Premium butyl rubber
  • Compatible tyre sizes: 26x1.75, 26x1.90, 26x1.95, 26x2.0, 26x2.10, 26x2.125
  • ETRTO range: 47-559, 50-559, 53-559, 54-559, 56-559, 57-559
❓ Frequently Asked Questions

Q: Are these tubes compatible with my 26-inch tyre size?

A: The tubes list explicit compatibility with 26x1.75, 26x1.90, 26x1.95, 26x2.0, 26x2.10 and 26x2.125, with matching ETRTO ranges as provided.

Q: Do the tubes use Presta or Schrader valves?

A: An AV32mm Schrader valve is fitted, so use a pump or adapter that supports Schrader fittings.

Q: How should the tube be fitted to avoid pinch flats?

A: Add a little air before installing so the tube holds shape; ensure an even bead of the tyre on both sides of the rim during final seating.

🏆 Our Verdict

Ideal for commuters and recreational cyclists who need dependable, easy-to-fit 26-inch spares. Durable butyl construction, a broad compatibility range and a common Schrader valve make these practical for routine repairs. Backed by a 180-day quality guarantee, the tubes deliver sensible long-term value for riders who carry repair kit.