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.
For fitting instructions see this helpful video >>>
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.
Remove the tyre and the tube from the wheel. Clean the rim thoroughly, check the tyre bead and wall for any damage and replace if necessary. Refit the tyre halfway onto the rim ready to insert the tube.
Fit the airless tube into the whole tyre and push back into the rim.
Using the levers to fit the tube into the well of the rim making sure that the tyre bead on the opposite side fits under the clincher. That is the part of the rim that retains the tyre bead.
Carefully fit the tyre over the rim using up to 3 levers, moving a small distance at a time. Be patient as you move around the rim being sure to seat the bead properly.
The tyre is too tight and we cannot get the tyre fitted over the Stopaflat tube.
Solution 1: Over-inflate the old tube for a day or two before trying to install. That will stretch the tire a little and make installation a bit easier.
Solution 2: Soften the Stopaflat inner tube in hot boiled water (NOT BOILING WATER) for not more than 1 minute. Install it right away after taking out of the water.
The tyre is too loose and there is a gap in between the Stopaflat tube and the tyre.
Solution: Cut-out the valve stem on the old inner tube, and pack that inner tube into the inside of the tire... BEFORE inserting the puncture-proof tube unit. Leaving the old, airless inner tube inside therefore filled-up some of the extra space remaining inside
Customer question:
I have recently installed one of your Stopaflat tubes in my three wheel mobility scooter on the 16 inch by 2,25 inch front wheel. Now there is a terrible side to side vibration at speeds over 10 km an hour, is this normal or do I now have some sort of wheel balance problem now. I noticed that when I received the product was zipp tied in a small box and slightly distorted the circular shape of the product, could this be the problem and will it eventually regain its shape or is it now permanently damaged because of the way it was packaged.
Our suggestion:
Unfortunately you have used the unmatching size of Stopaflat tube with the tyre. However, our largest size of 16" x 2.125 tube is still too small for your 16" x 2.25 tyre. In this case, it forms some space/gap between the tire and the tube. Also, the friction inside will start damaging the tube when riding. After a certain period of damage, the side by side vibration is being formed.
You should STOP using the damaged tube immediately. And in the future, you must get a matching size of tube for the wheel.
However, there are some tips that may be helpful for you.
1) No matter of any sizes of the solid inner tube. They must be placed in the tyre tightly (shouldn't be moved around)
2) If the space/gap is formed even with matching sizes (tyre/tube). You may use the old (pneumatic) inner tube as a "SPACER", the method as below:
Cut-out the valve stem on the old inner tube, and pack that inner tube into the inside of the tire... BEFORE inserting the puncture-proof tube unit. Leaving the old, airless inner tube inside therefore filled-up some of the extra space remaining inside.
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