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  1. #26
    Senior Member
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    Apr 2004
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    Central Florida
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    Trek 520
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    Just a quick mention: The helmet gets destroyed because it absorbs the energy of the impact. Works like those crush zones that let a car get accordian folded and the riders walk away. If the helmet were rigid and didn't get crushed the energy would get passed on to your head, which kind of defeats the purpose. Would avoid road rash though. . .

  2. #27
    Senior Member
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    hey, that may be it... so i let all of the air out of the front tire and kinda 'worked' the tire a little bit while gently pushing on the valve stem and the valve stem went 'back into' the tire some... and then the tire was sitting fine... so, i aired it up and the tire looks better when i spin it... here's my question though... the valve stem isn't sticking out as far as it was before... does that matter? if i compare the front (which i was just working on) to the back tire (which is the way the front was), the threads of the valve stem stick out about 3/8" on the front tube, and about 5/8" on the rear tube... **runs to get digital camera, takes pics, uploads them, etc **....

    front after pushing the valve stem 'into' the tire...


    rear... the way the front was...


    is the front ok? the tire looks better when it spins... the way it was (and the way the rear currently is), theres a slight wobble where the valve stem is when i spin the tire

    thanks guys
    -mike

    Quote Originally Posted by demoncyclist
    Push the valve back into the tire from the rim side as you seat the tire. If you put the valve nut on before fully seating the tire, it won't sit right. The tubes I'm using right now don't have threaded stems, so this isn't a problem. I wouldn't use a smaller tube. Inflating it to correct pressure in a tire that is larger than what the tube is designed for can put extra stress on the structural integrity of the rubber, as it needs to stretch farther to fill the tire properly, and becomes a thinner layer of rubber.

  3. #28
    Senior Member miamijim's Avatar
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    Aug 2003
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    Tampa, Florida
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    Riding on sidewalks is LEGAL in Florida.

    Helmets work..wanna hear horror stories?

    Tires make a tremendous difference in the handling of a bicycle.
    I have 2 sets of wheels for my Mtn. bike. One set is for off road riding, big knobby tires etc. The second set is for pure speed. Mavic Cross Rides with Conti contacts. Well, I wanted to go faster so I installed some Hutchinson Top Slick tires. The biggest mistake I've ever made in tire selection. Totaly crap tires with no cornering grip. The Contis went back on and the bike is much more stable. It isnt always technique, mines fine, sometimes it is the tires.
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  4. #29
    Senior Member demoncyclist's Avatar
    Join Date
    Oct 2002
    Location
    Medway, MA
    My Bikes
    2011 Lynskey Sportive, 1988 Cannondale SM400
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    mikey-

    Once you get the tire seated, pull the stem out and thread the little retaining nut on, but just make it a little snug. If you overdo it, you'll rip the stem right out of the tire
    DEMON

    Satanic Mechanic
    STAR 3 Spinning Instructor

    2011 Lynskey Sportive (Shimano Ultegra 10s)
    1988 Cannondale SM400 (Suntour XC-M 7s)

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