Since installing these tuffy liners (26 x 1.75 inch) i have not noticed any difference in ride performance , the liners are light even though the were not the ultralite and very tough. I had to use a few small blobs of cheap superglue to fix the liners to the tyres since they were moving about when i was installing the inner tube. After applying superglue rub over with talc or bicarbonate soda to ensure the glue is fully dry before installing inner tube..Place the spots of glue about 6 inches apart just enough to keep the liner centered until you put the tube in. Cheap superglue from dollar store seems to work well.