Advertise on Bikeforums.net



User Tag List

Results 1 to 15 of 15
  1. #1
    The Legitimiser Sammyboy's Avatar
    Join Date
    Jul 2005
    Location
    Southampton, UK
    My Bikes
    Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.
    Posts
    4,848
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Max Pressure for Non Hooked Edge Rims

    It's been suggested to me that my blowout on my fixed gear was not a case of the tube going so hard it blew the tyre off the rim, but instead of the tyre coming off the rim, and thereby allowing the tube to blow. Having checked, the bike does indeed lack hooked edges on the rim, meaning that my 100 psi may have been a little high. What can I get away with, do you think? 80?

  2. #2
    Death fork? Naaaah!! top506's Avatar
    Join Date
    Nov 2005
    Location
    The other Maine, north of RT 2
    My Bikes
    '71 Gitane Super Corsa, '73 Atala Giro d'Italia, '73 Schwinn Super Sport, '76 Viscount Aerospace Pro, '81 Miyata 710, '81 Lotus Classique, '84 Ross Signature 290s, '84 Shogun 500, '85 Miele Gara, '87 Miyata 512, '89 Centurion Ironman, many more
    Posts
    2,997
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I've been getting away with 90 on my old Atala using non-hooked Weinman rims and el cheapo wallyworld 27x1 1/4" tires. Two years with no problems. However, I suspect this will be a case by case issue. YMMV
    Top
    You know it's going to be a good day when the stem and seatpost come right out.

  3. #3
    biked well well biked's Avatar
    Join Date
    Jul 2005
    Posts
    6,712
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Here's a link to a thread I started on the same subject: Non hook-edge rims: how much pressure is too much?

  4. #4
    Senior Member
    Join Date
    Aug 2005
    Posts
    1,153
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    don't mean to be critical, but why the heck are are you using hookless rims?

    Well, if you insist on using them, even after a blowout, I'd say use wider tires, and lower pressure than 100.
    Quote Originally Posted by marqueemoon
    The correct response is "I live with your mom."

  5. #5
    The Legitimiser Sammyboy's Avatar
    Join Date
    Jul 2005
    Location
    Southampton, UK
    My Bikes
    Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.
    Posts
    4,848
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by moki
    don't mean to be critical, but why the heck are are you using hookless rims?

    Well, if you insist on using them, even after a blowout, I'd say use wider tires, and lower pressure than 100.
    Because I've got them. I had a pair of flip/flop wheels on a vintage road bike I parted out, and wanted to build a fixed gear, so, rather than spend £100 on a set of track wheels, I threw them on there.

  6. #6
    Senior Member
    Join Date
    Jul 2006
    Location
    Tucson AZ
    Posts
    584
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have a set that almost look like hooked rims, but they have more of a bead than a hook. I've learned to stop pumping at 80 (though I don't really know how accurate the gauge on my pump is). They run fine at that point, but just one more stroke of the pump sometimes blows them off.

  7. #7
    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
    14,356
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    I have one set of non-hooked rims (on the UO-8), and I keep the tire pressure below 80 PSI, which also requires me to buy tires designed for lower pressure. Running high-pressure tires underinflated is to invite sidewall breakdown.
    "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

  8. #8
    The Legitimiser Sammyboy's Avatar
    Join Date
    Jul 2005
    Location
    Southampton, UK
    My Bikes
    Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.
    Posts
    4,848
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Well, the ones I have (cheapola) are rated from 80 to 100. I reckon I could get away with 75 no problem.

  9. #9
    Broom Wagon Fodder reverborama's Avatar
    Join Date
    Jul 2006
    Location
    Minnesota
    My Bikes
    Fuji Supreme; Fuji Royale; Schwinn Varsity; Nishiki International; Schwinn Premis, Falcon Merckx
    Posts
    1,145
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I've been using 80 to 85lb on the bikes I have with unhooked rims and that seems to be working well. It goes without saying that you need to use steel beaded tires, not kevlar.

  10. #10
    The Legitimiser Sammyboy's Avatar
    Join Date
    Jul 2005
    Location
    Southampton, UK
    My Bikes
    Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.
    Posts
    4,848
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'm pretty sure that the cheapo £5 tyres I'm using are not kevlar!

  11. #11
    hunter, gatherer coelcanth's Avatar
    Join Date
    Feb 2005
    Posts
    1,183
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    using tires that tend to fit rims tightly helps allow higher pressure too.. your budget might not fit new tires
    but i've heard panaracers are sized a bit small.. i find contis to be tough to get on some rims too..

  12. #12
    Señor Member USAZorro's Avatar
    Join Date
    Oct 2004
    Location
    Carlisle, PA
    My Bikes
    1954 Hetchins M.O., 1959 Viking Severn Valley, 1970 Raleigh Pro, 1972 Fuji "The Finest", 1974 Raleigh Superbe&Comp, 1976 Raleigh Team Pro, 1994 Trek 830 MTB, 2000 Bob Jackson Arrowhead, Unicycle
    Posts
    13,034
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Contis are a bear to get on.

    Beware running pressure too low. That's when the snakes come out.
    The search for inner peace continues...

  13. #13
    The Legitimiser Sammyboy's Avatar
    Join Date
    Jul 2005
    Location
    Southampton, UK
    My Bikes
    Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.
    Posts
    4,848
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Well, I certainly can't run 100 psi! I proved that. I'll try 80.

  14. #14
    Senior Member
    Join Date
    Jul 2006
    Location
    Tucson AZ
    Posts
    584
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Just for future reference, the Continental Sport 1000 seems well suited for this use. Conti's recommended operating pressure for the 27x1-1/8 is 80 psi, and for 27 x 1-1/4 it's just 75.

  15. #15
    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
    14,356
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    I concur with GCRyder. The Conti Sport is a great choice for a non-hooked rim, and I believe Sheldon sells them.
    "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

Posting Permissions

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