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Tire mounting rituals(9 posts)

Tire mounting ritualsAndy
Sep 21, 2002 6:38 AM
Does anybody else do this...

Back in the late 70's or early 80's I read some tech tips in Bicycling Magazine on tire mounting procedures. One thing they recommended was to dust your tube with talcum powder and shake off the excess before mounting your tire. Sometimes I do this but not always. Another thing they said was to partially inflate after mounting and deflate several times to get the tube stretched out before inflating to full pressure. The people I ride with never do this and they think it's weird and time consuming. Just wanted to know if other people are fanatical about tire mounting as I am.
Powdering tiresfiltersweep
Sep 21, 2002 6:51 AM
... I think powdering has been debunked- the original idea was that it reduced friction between the tire and the tube, but it truly is a non-issue on a bike. I read somewhere that it was actually a practice ported over from the automotive industry before the days of "radials", but again, I have no idea where I read this... so I could well be full of it.

I can't imagine why there would be a need to "stretch out" the tube. If you think about it, you can easily blow up a tube to be LARGER than the tire anyway- so what is the point? The tire itself "limits" the stretch.
Powdering tiresAndy
Sep 21, 2002 6:58 AM
I think the idea was to get the tube evenly distributed inside the tire without binding on the inside surface of the tire. By partially inflating and deflating, the tube is supposed to seek it's natural position inside the tire with no binding stresses.
Powdering tireshinaults dog
Sep 21, 2002 7:30 AM
i still talc my tubes
its supposed to reduce pinch
flats i think it also helps when
putting on 'tight' tyres
I swear by powder!!Pygme
Sep 21, 2002 8:47 AM
I sear by powder, but not to make mounting the tire easier. It is to keep the tube from rubbing a hole in itself while in the seat bag.

I powder the tube, place it in a zip-lock bag, and put it in the seat bag.

Few things are worse than having a flat, only to find the spare has a hole in it also!
how about just swearing! (Late 1980's Michelins on MA-40's) nmVO2_max
Sep 21, 2002 11:05 AM
re: no powder but...Akirasho
Sep 21, 2002 10:24 AM
A good friend got me into the habit of, after mounting the tire/tube, partially inflating... then bouncing the tire round the circumference a bit to "seat, settle and check for pinches" the tube inside (kinda like stress relieving of tube and valve seat) before inflating to final pressure.

Dunno if it makes a real difference, but it's now part of my ritual and I'd feel awkward not doing it.

We abide.

Remain In Light.

Be the bike.
Talc helpsKerry
Sep 21, 2002 5:29 PM
Baby powder helps prevent the tube sticking to the tire casing. I've seen tubes REALLY stuck to the inside of the tire casing. Powder on the bead of the tire makes it easier to mount and insures that it snaps into the bead. The pressure surge thing is just superstitious behavior. Same goes for bouncing the partially inflated tire - you can tell if it's seated properly just by looking at it. Remember, around 1980 was when high performance clinchers were just getting started. There were a lot of problems in those days with flats, rim/tire compatibility, bead design, etc. Those things are all sorted out these days, so all the mumbo jumbo is not required. Just in case, light a couple of candles instead.
re: Tire mounting ritualsmanicoti
Sep 22, 2002 7:36 AM
I use powder, but not to get it in, to get the tube out. I have seen tubes go 1000+ miles with no flats and the be damn near impossible to get out of the tire. It only takes a minute and can save time on a flat change if your tube could be sticky. On hot days I would think that there is an increased chance of the tube possibly fusing to portions of the tire casing. I have no scientific data to back this up. I just do it out of habit.