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riding in ths rain



 
 
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  #1  
Old May 11th 07, 07:40 AM posted to rec.sport.unicycling
sp4rky-m4rky
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Default riding in ths rain


sp4rky-m4rky wrote:
nothing to do with riding in the rain but I didnt want to make another
thread, A friend who rides trials bikes said the reason that they drill
rims is not to save weight but to reduce the risk of snake bites, I
cant remember the reason he said because he didnt remember what he was
told but I think he said something about it help equalise pressure. I
thought this sounded wrong and still believe the reason its done is to
reduce weight, can someone clarafy?




so does anyone know the correct reason/reasons for drilling rims?


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  #2  
Old May 12th 07, 10:42 AM posted to rec.sport.unicycling
sp4rky-m4rky
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Default riding in ths rain


Il take that as a no then


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  #3  
Old May 12th 07, 05:31 PM posted to rec.sport.unicycling
matti_marron
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Default riding in ths rain


I ride bike trials and i think that it may equalise pressure as the
holes provide somewhere for the inner tube to go into when high
pressures are reached, but i always thort it was weight loss... wow..
thats a really amazing fact.. that they might do it to avoid
snakebites.. but to be honest on all the trials forums ive been on ive
never heard that before.


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  #4  
Old May 12th 07, 06:42 PM posted to rec.sport.unicycling
phil
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Default riding in ths rain


sp4rky-m4rky wrote:
so does anyone know the correct reason/reasons for drilling rims?



Drilling rims only works with the outer wall of double-skinned rims,
surely? If the tube could bulge out through drilled holes it would
puncture more easily on the edges of the holes and would actually make
snakebites more common as the air would bulge out of the holes instead
of stopping the tyre hitting the rim in the first place.

My money is still on weight reduction.


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  #5  
Old May 12th 07, 06:59 PM posted to rec.sport.unicycling
sp4rky-m4rky
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Default riding in ths rain


phil wrote:
Drilling rims only works with the outer wall of double-skinned rims,
surely? If the tube could bulge out through drilled holes it would
puncture more easily on the edges of the holes and would actually make
snakebites more common as the air would bulge out of the holes instead
of stopping the tyre hitting the rim in the first place.

My money is still on weight reduction.




that is exactly what I was thinking (which is why I was asking) if you
have your tyre realy hard you wont get a snakebite but if you lower it
so it bottom out you run the risk of your tube being pinched, if your
tube is allowed to bulge lowering the pressure inside your tube even
more (although I dont think it will lower the pressure much atall) I
think it will make it more likly to snake bite.

it was a friend who rides trials bikes which may exsplain it if its
wrong but he did hear it from one of the riders from the national bike
trials

when they drill rims they drill through both walls of the rim then put
a tough rim tape around it so that the tube dosnt bulge right out


--
sp4rky-m4rky

you may be lucky but you make your own luck

*)--360--O* The Unispin Elite

)---'O, Crankflip
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