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- Proven quality inner tubes by Schwalbe for most 650B (27.5 inch) mountain bikes
- Fits 650B tires size 27.5 inch x 1.50 to 2.4
- Model: SV21 (27.5″ tubes)
- Presta Valve 40mm
- Price is for 2 tubes
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Schwalbe tubes are designed and manufactured to retain air pressure considerably longer than their competitors. Not only is each individual tube inflated and inserted into a mould to ensure that there is even wall thickness and excellent air retention, they are also stored under pressure for 24hrs to test air retention. Valve Type: Presta 40mm Model: SV21 Approx weight: 145g per tube Price is for 2 tubes Fits the following tyre sizes: 27.5 x 1.50 (40-584) 27.5 x 1.75 (47-584) 27.5 x 2.00 (50-584) 27.5 x 2.10 (54-584) 27.5 x 2.25 (57-584) 27.5 x 2.35 (60-584) 27.5 x 2.40 (62-584)