Inner Tube Tern GSD - 20" x 2.1" - Schrader Valve - Puncture Sealant Filled Tubes Mountain Bike You can select this in

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BSA Threaded

Materials: Precision forged Cro-Mo steel and aircraft grade aluminium alloy

The longer the shackle

Inner Tube Tern GSD - 20" x 2.1" - Schrader Valve - Puncture Sealant Filled Tubes Mountain Bike You can select this inSlime Punture Sealant Designed to seal tread area punctures. Stops punctures from ruining your ride and keeps you going! Seals multiple punctures repeatedly for 2 years Seals tread area punctures up to 1 8 (3mm) in size Non toxic and non flammable Cleans up with water Features Min: 5 psi Max: 30 psi TERN BICYCLES COMPATIBILITY: This tube is designed to work with most 20" tyres between 2. 1 2. 4" including those supplied with current Tern GSD, HSD,