Surly 29+ Butyl Inner Tubes – Built for Demanding Terrain

Engineered for off-road cyclists seeking reliability, these butyl tubes deliver exceptional puncture resistance and air retention across rugged trails or urban commutes. The threaded Presta valve (32-40mm) ensures secure inflation while maintaining low weight at just 390g.

Key Performance Features
– Wide compatibility: Fits 29″ mountain bike tires with ISO widths 63-76mm (includes sizes 29×3″ through 29×3-1/4″)
– Dual-density butyl compound resists slow leaks better than standard tubes
– Removable brass valve core simplifies pressure adjustments mid-ride
– Threaded shaft design prevents valve detachment during rough terrain

Ideal For
✔️ Cross-country/enduro trail riding
✔️ Adventure touring with mixed surfaces
✔️ Tube replacements for Plus/29+ wheelsets
✔️ Racers needing consistent pressure retention

Technical Specifications
| Parameter | Specification |
|———————|————————|
| Valve Type | Presta (threaded) |
| Weight | 390g |
| Pressure Range | 35-65 PSI |
| Compatibility | 622mm rim diameter |
| Valve Core | Removable brass |

Why Choose Surly Tubes?
Unlike standard tubes that require frequent reinflation, our butyl construction maintains pressure stability for 2-3x longer between service intervals. The reinforced construction handles impacts from rocks and roots better than standard MTB tubes while maintaining road-ready responsiveness.

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