20 x 1.75-2.125 Bicycle Inner Tubes Straight Valve - 2 Pack
New rubber bicycle inner tubes with straight valves, for compatible 20-inch tyres marked 20 x 1.75 to 20 x 2.125. This 2-pack is intended for tube-type bicycle tyres. Supplied as pictured.
What's Included
- 2 x 20-inch bicycle inner tubes
- Straight valves as shown
Tyre Size & Fitment
- Nominal tyre size: 20 x 1.75–2.125 inches (check markings on existing tyre and tube)
- Typical application: compatible children's, BMX, folding and other 20-inch bicycles with matching tyre and valve specifications
- Common 20 x 1.75 tyre marking: 47-406. Check the tyre's ETRTO bead-seat diameter rather than relying on the 20-inch label alone.
Important Size & Valve Check
Not all 20-inch wheels use the same rim diameter. This is intended for the common 406 mm rim-size family where the tyre width also falls within the stated range; it is not intended for 20-inch 451 mm or other differently sized rims. Confirm the exact ETRTO size printed on your tyre and the replacement tube's markings before fitting.
The source listing specifies a straight valve but does not confirm whether it is Schrader or Presta. Compare the valve shape and diameter in the product photos with your existing tube and rim hole before ordering. Check valve length and pump compatibility too.
E-bike suitability depends on the bicycle's actual tyre size, rim and valve specifications; this is not a universal e-bike fitment claim.
Condition
Brand new, unbranded replacement inner tubes. No manufacturer part number (MPN) is supplied.
Delivery & Returns
- Free UK delivery; estimated 2–3 working days
- 30-day returns, subject to original condition