This is Surly’s 29 x 3-inch Presta valve tube. It fits their Knard tires and is made of butyl rubber.

• Butyl rubber • 32mm-long Presta valve (smooth/removable core) • 20 x 1.25-1.5 (406 x 37-45)

• Butyl rubber • Schrader valve • 20 x 2.75-3

• Butyl rubber • 48mm-long Schrader valve • 29 x 2.1 (700 x 50-52)

• Butyl rubber • Thorn-resistant • 48mm-long threaded Presta valve • 700 x 35-43 (27 x 1 3/8)

- No more flats for 2 years! - Extra strong with Slime sealant inside - Instantly seals tread area punctures up to 1/8? (3mm) in size - Seals multiple punctures repeatedly - Non-toxic and non-flammable - Cleans up with water

- Lightest pre-Slimed tubes available - 26 inch is 219 grams

Serfas replacement inner tubes are lightweight, durable, and affordable.

Q-Tubes Fat Tubes have what you need for big tires -1.0mm wall thickness -Q-Tubes Fat Bike tubes feature environmentally friendly soy ink printing on recycled cardboard Labeled Size: 26 x 4.0-4.8 Weight: 580 g ISO Width (mm): 100 mm , 101 mm , 102 mm , 103 mm , 104 mm , 105 mm , 106 mm , 107 mm , 108 mm , 109 mm , 110 mm , 111 mm , 112 mm , 113 mm , 114 mm , 115 mm , 116 mm , 117 mm , 118 mm , 119 mm , 120 mm ISO Diameter: 559 / 26" MTN Valve: Standard Schrader Wall Thickess: 1 mm

• 4mm wall thickness in the tread area and 2mm in the rim area • ISO Diameter: 622 / road / 29" , 630 / 27" • ISO Width (mm): 54 mm , 55 mm , 56 mm , 57 mm , 58 mm • Labeled Size: 29 x 2.1-2.3 • Tube Compound: Butyl • Valve: Presta • Valve Core: Removable • Valve Length: Short 32-40mm • Valve Shaft: Threaded • Weight: 681g

• 4mm wall thickness in the tread area and 2mm in the rim area • ISO Diameter: 622 / road / 29" , 630 / 27" • ISO Width (mm): 48 mm , 49 mm , 50 mm , 51 mm , 52 mm , 53 mm , 54 mm • Labeled Size: 29 x 1.9-2.3 • Tube Compound: Butyl • Valve: Standard Schrader • Valve Core: Removable • Valve Length: Schrader • Valve Shaft: Smooth • Weight: 673g

• Low Lead Valve • ISO Diameter: 203 / 12.5 • ISO Width (mm): 57 mm • Labeled Size: 12 x 2-1/4 • Tube Compound: Butyl • Valve: Standard Schrader • Valve Core: Removable • Valve Length: Schrader • Valve Shaft: Smooth

• Low Lead Valve • ISO Diameter: 305 / 16" BMX • Tube Compound: Butyl • Valve: Standard Schrader • Valve Core: Removable • Valve Length: Schrader • Valve Shaft: Smooth • Weight: 76g (1.25-1.5), 92g (1.5-1.75), 102g (1.75-2.125)

• Low Lead Valve • ISO Diameter: 355 • ISO Width (mm): 44 mm , 45 mm , 46 mm , 47 mm , 48 mm , 49 mm , 50 mm , 51 mm , 52 mm , 53 mm , 54 mm • Labeled Size: 18 x 1.75-2.125 • Tube Compound: Butyl • Valve: Standard Schrader • Valve Core: Removable • Valve Length: Schrader • Valve Shaft: Smooth • Weight (g): 118 g

• ISO Diameter: 438 , 451/ 20 x 1-1/8", 20 x 1-1/8" • ISO Width (mm): 28 mm , 29 mm , 30 mm , 31 mm , 32 mm , 33 mm , 34 mm • Labeled Size: 20 x 1-1/8 - 1-3/8 • Tube Compound: Butyl • Valve: Presta • Valve Core: Removable • Valve Shaft: Threaded • Weight: 98g

• ISO Diameter: 406 / 20" BMX • Tube Compound: Butyl • Valve: Presta • Valve Core: Removable • Valve Length: Short 32-40mm • Valve Shaft: Threaded • Weight: 92g (1.25-1.5), 118g (1.5-1.75), 132g (1.75-2.125)

• Low Lead Valve • ISO Diameter: 406 / 20" BMX • Tube Compound: Butyl • Valve: Standard Schrader • Valve Core: Removable • Valve Length: Schrader • Valve Shaft: Smooth • Weight: 98g (1.25-1.5), 114g (1.5-1.75), 130g (1.75-2.125), 152g (2.1-2.3)

• ISO Diameter: 507 / 24" BMX • Tube Compound: Butyl • Valve: Presta • Valve Core: Removable • Valve Length: Short 32-40mm • Valve Shaft: Threaded • Weight: 152g (1.9-2.125), 188g (2.1-2.3 & 2.4-2.75)

• ISO Diameter: 559 / 26" mtn , 584 / 650b / 27.5" • ISO Width (mm): 33 mm , 34 mm , 35 mm , 36 mm , 37 mm , 38 mm , 39 mm , 40 mm , 41 mm , 42 mm , 43 mm , 44 mm • Labeled Size: 26 x 1.5-1.75 • Tube Compound: Butyl • Valve: Presta • Valve Core: Removable • Valve Shaft: Threaded • Weight 152g (32mm), 158g (48mm)

• ISO Diameter: 559 / 26" mtn • ISO Width (mm): 60 mm , 61 mm , 62 mm , 63 mm , 64 mm , 65 mm , 66 mm , 67 mm , 68 mm , 69 mm • Labeled Size: 26 x 2.4-2.75 • Tube Compound: Butyl • Valve: Presta • Valve Core: Removable • Valve Length: Short 32-40mm • Valve Shaft: Threaded • Weight: 283g

• ISO Diameter: 559 / 26" mtn • Tube Compound: Butyl • Valve: Standard Schrader • Valve Core: Removable • Valve Length: Schrader • Valve Shaft: Smooth • Weight: 102g (1-1.25), 165g (1.5-1.75), 174g (1.9-2.125), 198g (2.1-2.3), 281g (2.4-2.75)

• ISO Diameter: 584 / 650b / 27.5" • ISO Width (mm): 52 mm , 53 mm , 54 mm , 55 mm , 56 mm , 57 mm , 58 mm • Labeled Size: 27.5 • Tube Compound: Butyl • Valve: Presta • Valve Core: Removable • Valve Length: Schrader • Valve Shaft: Schrader

• ISO Diameter: 584 / 650b / 27.5" • ISO Width (mm): 52 mm , 53 mm , 54 mm , 55 mm , 56 mm , 57 mm , 58 mm • Labeled Size: 27.5 x 52/58 • Tube Compound: Butyl • Valve: Presta • Valve Core: Removable • Valve Shaft: Threaded

• ISO Diameter: 622 / road / 29" , 630 / 27" • ISO Width (mm): 18 mm , 19 mm , 20 mm , 21 mm , 22 mm , 23 mm • Labeled Size: 700c x 18-23 • Tube Compound: Butyl • Valve: Presta • Valve Core: Removable • Valve Shaft: Threaded • Weight: 100g (32mm), 101g (48mm & 60mm), 103g (80mm)

• ISO Diameter: 622 / road / 29" • ISO Width (mm): 23 mm , 24 mm , 25 mm • Labeled Size: 700c x 23-25 • Tube Compound: Butyl • Valve: Presta • Valve Core: Removable • Valve Shaft: Threaded • Weight: 125g (32mm), 126g (48 & 60mm), 128g (80mm)

• ISO Diameter: 622 / road / 29" • ISO Width (mm): 35 mm , 36 mm , 37 mm , 38 mm , 39 mm , 40 mm , 41 mm , 42 mm , 43 mm • Labeled Size: 700c x 35-43 • Tube Compound: Butyl • Valve: Presta • Valve Core: Removable • Valve Shaft: Threaded • Weight: 140g

• ISO Diameter: 622 / road / 29" • Tube Compound: Butyl • Valve: Standard Schrader • Valve Core: Removable • Valve Length: Schrader • Valve Shaft: Smooth • Weight: 110g (23-25mm), 128g (28-32mm), 144g (35-43mm), 160g (40-45mm)

650c x 18-23mm tube. Available with either a 48mm or 60mm Presta valve stem.

When building your featherweight dream bike, don't forget the tubes! Michelin's Aircomp Ultralight tubes are nearly weightless for minimum rolling resistance and maximum speed.

- 2-ply rubber shield fits between tire and tube to prevent flats - Pair