Dr Sludge Self Sealing 700c x 19c-25c Presta Valve
- Contains a sealant to prevent flat bicycle tyres
- Seals punctures up to 3mm in length
- Harmless sealant works time after time
Sizing Information
- This size of inner tube is used on road, triathlon and some slim tyres for commuting/touring bikes.
- Presta valve type (AKA High Pressure Valve or French Valve).
These innertubes are compatible with the following ETRTO tire sizes:
Metric Sizes
700 x 19 = ETRTO 19-622 700 x 21 = ETRTO 21-622 700 x 23 = ETRTO 23-622 700 x 25 = ETRTO 25-622Imperial Sizes
28 x 3/4" = ETRTO 19-622 28 x 7/8" = ETRTO 22-622 28 x 1" = ETRTO 25-622 27 x 7/8" = ETRTO 22-630 27 x 1" = ETRTO 25-630 As you can see this tube will fit both the ETRTO rim sizes 622mm and 630mm. You may know that rim and tyre sizes must match each other exactly, but due to the flexibility of an inner tube they can often fit more than one rim size.
