YunSCM 20x4 Heavy Duty Fat Bike Tubes 102-406 20x4.0 E-Bike Fat Tyre Tubes 20" Compatible with 20x3.50-4.0 Mountain/Road/e Bike/Bicycle Tube 20x3.5 20 x 4.0| AV32mm Schrader Valve

Excellent quality, nice and thick as described. Quick delivery. Would recommend

Perfect to replace the tube on my e-bike

Super fast delivery as normal, not used yet but seem strong tough tubes

Arrived on time, but unfortunately wrong size orderd.

goof

Fits well on 4 inch rim

I like the feel of these tubes and yes time will tell if they are the business. I replaced my original tubes after 2 years because i fill them with slime which goes hard after this time. My original tubes hit a puncture early on but the slime sealed the problem. I did not trust the source of my original purchase so i swapped onto these tubes which so far is good and doing the job so i am very happy and long may it continue. I may have been unlucky with the original and we know the danger of punctures but my mind works on gut feelings and my gut instincts tell me that the swap over to these is a good decision so here we go with them...

Good purchase