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Puncture proof inner tubes

About Our Sizing

Stopaflat tubes are "Size Specific" to a tyre and care should always be taken when matching the tube to the tyre. Please note that our 1.75 sizes will fit a 1.90 standard tyre. Tyre width markings are clearly embossed on the outside wall of a tyre. However there can be variations between tyre manufacturers and tread designs.

Occasionally it may be necessary to fit a larger or smaller
tube than indicated by the tyre size to correct this. A simple test is to insert the tube into the tyre, pinch the beads together and measure from bead to bead. This should be around 20mm of the internal width of the rim.

If in doubt please consult your local dealer who will be happy to advise on sizing and fitting.



Our Stopaflat XT range is extra tough and made from a different formula, ideally suited for hire bikes and bike share schemes. Our Stopaflat XT tubes are red in colour, so as to distinguish the tube from our regular Stopaflat tubes, which are yellow. The XT range is also suitable for use in E-Bikes.

AVAILABLE SIZES

12 1/2 x 1 75 x 2 1/4 (47-203)
12 1/2 x 2 1/4(62-203)
16 x 1 75R (47-305)
16 x 2 125 (57-305)
20 x 1 75 (47-406)
20 x 2 125 (57-406)
24 x 1 75N (47-507)
24 x 1 3/8 (37-540)
26 x 1 95 (50-559)
26 x 2.125 (57-559)
27.5 x 2.1 (54-584)
29 x 2.1 (54-622)


14 x 2.40 (64-254)
16 x 2.40 (64-305)


24 X 1.25 Stopaflat XT (32-507)
26 x 1.5 Stopaflat XT (40-559)
26 x 1.95 Stopaflat XT (50-559)
700 x 35c Stopaflat XT (37-622)
700 x 38c Stopaflat XT (40-622)
sizes
Weight Limits:

Regular Stopaflat: weight limit of 200 lbs per bike
Stopaflat XT: weight limit of 300 lbs per bike

Please contact us if you have a specific application you think we may be able to assist you with.

Size Guide

Extra Gives

Pinch Test

No More Flats, No More Stress

Don't just take our word for it. Real feedback from real customers.

I have been using your yellow ethylene foam Stop A Flat 26-inch airless tubes for under a year now and I just wanted to give a really positive review.

I've had horrendous problems with the typical air tubes which don't last very long for instance such as the pre-Slimed 26-inch tubes and usually they go flat in a few days ,or next day to a few weeks and I just reached the point where I couldn't deal with it anymore so I asked a friend of mine last year to purchase Stop A Flat foam tubes for a 26-inch bike that she gave me as a gift and I am so happy with this purchase and this product. My bike has been much more reliable and no down time and no more flats. I will never go back to purchasing traditional bicycle tubes . They are absolute garbage.

Stop A Flat airless tubes are expensive but very worth it. No more being late to work especially when headed home or going anywhere. Very reliable product.

My concerns or fears about rolling over sharp objects is over.

Thank you so much for making an excellent product and I wanted to give a five-star review for the Stop A Flat product. A very happy customer.

- Jonathan