Advertise on Bikeforums.net



User Tag List

Results 1 to 10 of 10
  1. #1
    Peddlin' Around Detroit Motorad's Avatar
    Join Date
    Dec 2006
    Location
    Livonia, MI
    My Bikes
    Legend, Saluki, Trek 730
    Posts
    740
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Presta-Valved Tire Tubes for Club Rides

    For the Shimano 7801-SL wheel, I've narrowed my tire choice to Michelin's Pro2 Race. The attached chart shows this tire got good ratings as far as weight, puncture resistance, and rolling resistance:
    < http://www.rouesartisanales.com/article-1503651.html >

    I thought selection of tubes for this tire (or any tire) would be a no-brainer, but there are choices to be made. But at least I know I want the Presta valve.

    I never knew the tube weights could fluctuate so much, from 75 to 175 grams. I first assumed that to make it simple, I should just get a Michelin tube for the Michelin Pro2 Race. But Performance Bike only sells one Michelin tube, and as far as I can tell, it's the only tire tube that Michelin makes. Is this correct?
    < http://www.performancebike.com/shop/...tegory_ID=5411 >

    I don't know if it matters, but the Michelin tube that Performance bike sells is "for aero rims". As far as I can tell, the Shimano 7801-SL is not an aero rim. So is it redundant to get a long valve stem for this wheel?

    For the 7801-SL wheels and the Pro2 Race tires ... and for club rides:
    1. Does it matter on the length of the presta valve stem?
    2. Does it matter if the valve stem is threaded or not?
    3. What are recommended tire tubes to consider?

  2. #2
    feros ferio John E's Avatar
    Join Date
    Jul 2000
    Location
    www.ci.encinitas.ca.us
    My Bikes
    1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
    Posts
    14,354
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    The long stems are for deep-dish areo rims. You can use them on other rims, as I have, but with increased risk of either breaking the stem or pulling it out of the tube itself, because of the increased leverage.
    "Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
    Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
    Peugeot: 1970 UO-8, S/N 0010468
    Bianchi: 1981 Campione d'Italia, S/N 1.M9914
    Schwinn: 1988 Project KOM-10, S/N F804069

  3. #3
    Senior Member
    Join Date
    Jun 2004
    Location
    Northern Nevada
    Posts
    3,725
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Tubes aren't nearly as complicated as you're making them. I have bikes with tire sizes from 700x23 to 700x40, and for the sake of simplicity, I buy one size tube: 700x25 or as close to it as the store has in stock. I've never had a problem--they just stretch to fit the fatter tires. Same with mountain bikes: from 26x1.4 on my commuter to 26x2.2, everything gets 1.5-1.9 inch tubes, whatever's in stock or on sale. It's just not an issue. Nor is there any reason to match brands of tubes with tires. Years ago, cyclists used to say about tubes, "they all suck, but German ones suck least." I buy Continentals when I can, but that's probably not more than 20 percent of the time.
    As the other post said, long stems are for aero rims, which are deeper in cross section. You CAN use them with any rims, but I've seen experienced cyclists break them off trying to inflate them--lots of leverage there.
    Most riders I know don't bother threading on the little nut or the cap that come with prestas, and I never have.

  4. #4
    Senior Member
    Join Date
    Aug 2006
    Location
    Los Angeles, CA
    My Bikes
    Raleigh Competition (old)
    Posts
    57
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Motorad
    The attached chart shows this tire got good ratings as far as weight, puncture resistance, and rolling resistance
    What are the practical impacts of factors like tire rolling resistance and weight? For example, how many seconds might a low rr/weight tire knock off one's 10k time trial?
    Escher's law of cycling: It is uphill both ways.

  5. #5
    Let's do a Century jppe's Avatar
    Join Date
    Oct 2004
    Location
    North Carolina
    My Bikes
    Pinarello Prince/Campy SR; Cervelo R3/Sram Red; Trek 5900/Duraace, Cervelo P2C/Duraace
    Posts
    5,832
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Motorad
    For the 7801-SL wheels and the Pro2 Race tires ... and for club rides:
    1. Does it matter on the length of the presta valve stem?
    2. Does it matter if the valve stem is threaded or not?
    3. What are recommended tire tubes to consider?
    I prefer the shorter valve stems but any will do assuming they are long enough to extend through the rim and leave you clearance for the air pump nozzle.

    It doesn't matter. I like the smooth valve stems as they are easier to get off after inflating a tire-the nozzle seems to stick more on the threaded stems which might mean I'm pulling harder to get it off-which could lead to premature tearing of the valve stem on the tube. On the other hand, I have seen where the nozzle holds on tighter to the threaded valve stems on higher pressures -130lbs and up-so they are easier to inflate.

    Depends on the type of riding and roads you do. I can get by with using the lighter weight, thinner walled tubes as I don't have as much an issue with road debris as some people do.

  6. #6
    Live To Ride Another Day! MarkAJ's Avatar
    Join Date
    Aug 2006
    Location
    Burbank, CA
    My Bikes
    Pig with lipstick (Trek Pilot 2.1 Ulterga Group/Compact Crank)
    Posts
    303
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I don’t buy the super light racing tubes. I buy the cheapest tubes for my tires and wheels (long value, short value, threaded, unthreaded) the store has and never have any more or less problems than my peers. The tire is another story.
    I'm pushing it "High and Wide".
    -Mark

  7. #7
    Time for a change. stapfam's Avatar
    Join Date
    Jan 2004
    Location
    6 miles inland from the coast of Sussex, in the South East of England
    My Bikes
    Dale MT2000. Bianchi FS920 Kona Explosif. Giant TCR C. Boreas Ignis. Pinarello Fp Uno.
    Posts
    19,915
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by MarkAJ
    I donít buy the super light racing tubes. I buy the cheapest tubes for my tires and wheels (long value, short value, threaded, unthreaded) the store has and never have any more or less problems than my peers. The tire is another story.
    Always been the same on the MTB's and carrying on with the road bike.

    I buy a Name that I recognise Tube. Michelin or schwalbe seem to be my favourites at present. Not a lightweight tube but I do not need those. However- Many moons ago I got hold of some heavyweight Latex tubes for the Tandem. They were lighter than the ordinary butyl but Lightweight latex is light. Lightweight tubes don't last with me at all. But these heavy latex for the Tandem had a distinct benefit. You get the in and Out thorns that plague me and with a Butyl the tyre went down quick. With the latex- they semi-seal against the hole and it is if I just have a slow puncture. Can normally get about 10 miles before it goes flat on me so a couple of pumps and I do not have to change tubes on the trail. In the case of a big puncture- they still go down slower than normal. One memorable occasion I got a Snakebite on a rough trail and we had enough time to stop before the tyre went down. It continued hissing for another 30 seconds.
    How long was I in the army? Five foot seven.


    Spike Milligan

  8. #8
    The guy in the 50+ jersey PAlt's Avatar
    Join Date
    Aug 2002
    Location
    Davidson, NC
    My Bikes
    Specialized S-Works Roubaix, Litespeed Tuscany Road, Specialized Allez Epic lugged carbon frame Road,Giant Anthem 29'r, Klein Hardtail
    Posts
    716
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by jppe
    I prefer the shorter valve stems but any will do assuming they are long enough to extend through the rim and leave you clearance for the air pump nozzle.

    It doesn't matter. I like the smooth valve stems as they are easier to get off after inflating a tire-the nozzle seems to stick more on the threaded stems which might mean I'm pulling harder to get it off-which could lead to premature tearing of the valve stem on the tube.
    Agree on smooth stems. I've also had issues on the valve tip breaking off when I remove the nozzle on threaded stems, not at the tube, but the small screw. The tube doesn't deflate and holds pressure, but you'll be changing the tube before your NEXT ride

  9. #9
    OnTheRoad or AtTheBeach stonecrd's Avatar
    Join Date
    Aug 2005
    Location
    Weston, FL
    My Bikes
    Ridley Noah RS, Scott CR1 Pro
    Posts
    2,161
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have deep V rims so I need long stem tubes. Around here you really can only get Specialized or Continental tubes at the LBS and they are cheap enough that it is not worth getting them online. I usually get 700x18/23 since I ride 23 tires, both tend to come with threaded presta valves. I like the continentals better they seem to resist flats better (might be my imagination) and I have less problems getting the pump to seal on the valve that the Specialized (not my imagination). Seems with those I alway get air leaking and I have to reseat the pump head 2-3 times to get up to pressure.
    The problem with the gene pool is that there is no lifeguard and the shallow end is much too large

    2013 Noah RS

  10. #10
    Ride Daddy Ride Jet Travis's Avatar
    Join Date
    Feb 2007
    Location
    Villa Incognito
    My Bikes
    1983 Trek 720; 1983 Trek 620; 1989 Gi Cannondale Bad Boy Ultra; LeMond Victoire; Bike Friday Pocket Rocket Pro
    Posts
    2,649
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I buy the Performance house brand. They're not the lightest but they're durable and almost alway on sale.
    "Light it up, Popo." --Levi Leipheimer

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •