Road tubeless tyres, where and how much?

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  • ddraver
    ddraver Posts: 26,698
    If I was God there would be an extra 8th circle of hell for Evans Employees...
    We're in danger of confusing passion with incompetence
    - @ddraver
  • jdee84
    jdee84 Posts: 291
    Would a 23mm schwalbe pro one come up closer to 25mm on a panceti sl23 v2 rim?

    Fitted an set of conti grand sport clinchers in 23mm at the weekend and they came up to around the external width of the rim.
  • drlodge
    drlodge Posts: 4,826
    Glad it worked for you, similar experience to myself...washing up liquid, enough tape so things nearly seal, and add sealant for the last seal-em-up-proper bit.
    WyndyMilla Massive Attack | Rourke 953 | Condor Italia 531 Pro | Boardman CX Pro | DT Swiss RR440 Tubeless Wheels
    Find me on Strava
  • rando
    rando Posts: 285
    Having a blooming mare trying to get IRC road lite tyres seated on a tubeless rim. Just cannot get it to pop onto the rim. Tried washing up liquid without success and then put a inner tube in and mounted the tyre and it did pop onto rim but having removed the inner tube I then cannot get it to seal again. Only got a track pump but if it's this much hassle then I am seriously considering forgetting about tubeless .
    Please give me any other tips to try !
  • RobinB2
    RobinB2 Posts: 111
    I've just spent my evening mounting an IRC Roadlite on a 340 Alpha rim. Was about to give up but then loosened the valve, pushed it fully up into the tyre and then re-tightened. The tyre then popped using a track pump. Seems the tyre wasn't wrapping around the valve seat without a bit of encouragement
  • rando
    rando Posts: 285
    RobinB2 wrote:
    I've just spent my evening mounting an IRC Roadlite on a 340 Alpha rim. Was about to give up but then loosened the valve, pushed it fully up into the tyre and then re-tightened. The tyre then popped using a track pump. Seems the tyre wasn't wrapping around the valve seat without a bit of encouragement
    Right I will try this tomorrow . Please let it work !!
  • fat_tail
    fat_tail Posts: 786
    rando wrote:
    RobinB2 wrote:
    I've just spent my evening mounting an IRC Roadlite on a 340 Alpha rim. Was about to give up but then loosened the valve, pushed it fully up into the tyre and then re-tightened. The tyre then popped using a track pump. Seems the tyre wasn't wrapping around the valve seat without a bit of encouragement
    Right I will try this tomorrow . Please let it work !!

    if that doesn't work try CO2

    although I had no problems getting mine to seat on Hunt rims... a 1:1 mixture (roughly) of washing up liquid and water.
    Ridley Fenix SL
  • Fat-Boy-Roubaix
    Fat-Boy-Roubaix Posts: 413
    The two times mine were difficult was a leak in the tape, and a wide tyre on a fairly wide rim not enough seal over the valve. The latter solved with Co2 merely as it freed up a hand to push the tyre down over the valve having levered the tyre over the valve.
  • rando
    rando Posts: 285
    Well i think i have managed to get them sealed although now do not feel confident about riding them !
    How layers of rim tape do people normally apply ? I only have 1 layer of stans yellow rim tape on. Would adding another help ?
    I think i will ride up and down the street a few times to see if they hold pressure before venturing out tonight.
  • fat_tail
    fat_tail Posts: 786
    rando wrote:
    Well i think i have managed to get them sealed although now do not feel confident about riding them !
    How layers of rim tape do people normally apply ? I only have 1 layer of stans yellow rim tape on. Would adding another help ?
    I think i will ride up and down the street a few times to see if they hold pressure before venturing out tonight.


    two layers and make sure there is an overlap of about 4" at the end. look at the Stan's website
    Ridley Fenix SL
  • rando
    rando Posts: 285
    fat_tail wrote:
    rando wrote:
    Well i think i have managed to get them sealed although now do not feel confident about riding them !
    How layers of rim tape do people normally apply ? I only have 1 layer of stans yellow rim tape on. Would adding another help ?
    I think i will ride up and down the street a few times to see if they hold pressure before venturing out tonight.


    two layers and make sure there is an overlap of about 4" at the end. look at the Stan's website

    Thanks - start again time then ! i need to wait till my new tape and sealant arrives then. Bugger.
  • oldbazza
    oldbazza Posts: 646
    Well so far 1,774km(or 1,104 miles) done on the pro-ones so far;a few small cuts(filled with tube glue) and that's all :) .

    Probably curse myself for putting this up at some point though :roll: .
    Ridley Helium SL (Dura-Ace/Wheelsmith Aero-dimpled 45 wheels)

    Light Blue Robinson(105 +lots of Hope)

    Planet X XLS 1X10(105/XTR/Miche/TRP Spyre SLC brakes

    Graham Weigh 105/Ultegra
  • fat_tail
    fat_tail Posts: 786
    hi - anyone know what the little sticky out bits of rubber are on IRC roadlites ?
    Ridley Fenix SL
  • ddraver
    ddraver Posts: 26,698
    SOmething to do with how tyres are made. It's commonplace on all tyres, nothing to worry about, it will wear out in a few rides
    We're in danger of confusing passion with incompetence
    - @ddraver
  • fat_tail
    fat_tail Posts: 786
    ddraver wrote:
    SOmething to do with how tyres are made. It's commonplace on all tyres, nothing to worry about, it will wear out in a few rides

    I googled it and I think they are called "sprues". I clipped the ones on the sides of my rear Roadlites with nail clippers as the clearance at the back is not huge i felt they could be hitting the chainstays !
    Ridley Fenix SL
  • munkster
    munkster Posts: 819
    Having a blooming mare trying to get IRC road lite tyres seated on a tubeless rim.

    If it's any consolation they're an absolute cinch to fit, mount and seal second time round after you've been riding them a while and had cause to remove and re-fit them :D

    First time though :shock: :cry:
  • rando
    rando Posts: 285
    munkster wrote:
    Having a blooming mare trying to get IRC road lite tyres seated on a tubeless rim.

    If it's any consolation they're an absolute cinch to fit, mount and seal second time round after you've been riding them a while and had cause to remove and re-fit them :D

    First time though :shock: :cry:
    Well I am about to try for the second time now I have another roll of rims tape and more sealant. I did eventually get them mounted and they stayed up but didn't ride on them as only had 1 layer of tape. Won't make that mistake again. My thumbs have about recovered now so will try the process again.
  • ugo.santalucia
    ugo.santalucia Posts: 28,312
    fat_tail wrote:
    ddraver wrote:
    SOmething to do with how tyres are made. It's commonplace on all tyres, nothing to worry about, it will wear out in a few rides

    I googled it and I think they are called "sprues". I clipped the ones on the sides of my rear Roadlites with nail clippers as the clearance at the back is not huge i felt they could be hitting the chainstays !

    Rubber is fitted on the carcass by injection molding, the bits sticking out are the points where rubber wa injected and then solidified when vulcanised. Virtually every rubber tyre on the planet is made that way and has those bits, I am surprised you never seen them before
    left the forum March 2023
  • fat_tail
    fat_tail Posts: 786
    ugo.santalucia wrote:
    fat_tail wrote:
    ddraver wrote:
    SOmething to do with how tyres are made. It's commonplace on all tyres, nothing to worry about, it will wear out in a few rides

    I googled it and I think they are called "sprues". I clipped the ones on the sides of my rear Roadlites with nail clippers as the clearance at the back is not huge i felt they could be hitting the chainstays !

    Rubber is fitted on the carcass by injection molding, the bits sticking out are the points where rubber wa injected and then solidified when vulcanised. Virtually every rubber tyre on the planet is made that way and has those bits, I am surprised you never seen them before

    i guess they were never a problem when there was more clearance in the back but with the IRC 25mm blowing up to 27mm it is slightly more worrying ! And I don't recall any other tyres having sprues on the sides of the same length as the IRC.
    Ridley Fenix SL
  • stevie63
    stevie63 Posts: 481
    fat_tail wrote:
    ugo.santalucia wrote:
    fat_tail wrote:
    ddraver wrote:
    SOmething to do with how tyres are made. It's commonplace on all tyres, nothing to worry about, it will wear out in a few rides

    I googled it and I think they are called "sprues". I clipped the ones on the sides of my rear Roadlites with nail clippers as the clearance at the back is not huge i felt they could be hitting the chainstays !

    Rubber is fitted on the carcass by injection molding, the bits sticking out are the points where rubber wa injected and then solidified when vulcanised. Virtually every rubber tyre on the planet is made that way and has those bits, I am surprised you never seen them before

    i guess they were never a problem when there was more clearance in the back but with the IRC 25mm blowing up to 27mm it is slightly more worrying ! And I don't recall any other tyres having sprues on the sides of the same length as the IRC.

    The ones on the Fortezza tricomps I had were so long they actually scored a black line on the inside of my Fork. Needless to say I always cut them off now.
  • fat_tail
    fat_tail Posts: 786
    How much sealant do people put into tubeless ? I have 30 ml in each 25mm IRC tyre. Is that enough ?
    Ridley Fenix SL
  • drlodge
    drlodge Posts: 4,826
    30ml here, should be sufficient for road tyres.
    WyndyMilla Massive Attack | Rourke 953 | Condor Italia 531 Pro | Boardman CX Pro | DT Swiss RR440 Tubeless Wheels
    Find me on Strava
  • shing83
    shing83 Posts: 61
    Thinking of taking the plunge and going tubeless after so many flats due to little pieces of London causing me to flat on a monthly basis. But, I'm a complete nube so need some advice on how to fit. I've got velocity aileron rims (built up by Ugo :) ) but, starting off, rim tape, what to use and how much to use on the rim... Does anyone have a good step by step guide on fitting tubeless?
  • singleton
    singleton Posts: 2,523
    This may be worth watching.
    https://youtu.be/_lvieF8IZB8
  • fat_tail
    fat_tail Posts: 786
    Is it alright to use two different sealants in the same tyre ? I have some Continental sealant but I have already used Schwalbe stuff. Was thinking of smearing some around the bead to improve the air tightness...
    Ridley Fenix SL
  • fat_tail
    fat_tail Posts: 786
    How do you repair a tubeless tyre when the sealant doesn't work ? Had a flat on the way home this evening !
    Ridley Fenix SL
  • stevie63
    stevie63 Posts: 481
    Take a tube with you and shove that in seems to be the solution. You can also get those weird plug things.
  • fat_tail
    fat_tail Posts: 786
    stevie63 wrote:
    Take a tube with you and shove that in seems to be the solution. You can also get those weird plug things.

    the hole doesn't seem to be too big. disappointed with tubeless experience so far. that was 510 km in 2 weeks and 1 flat which the sealant didn't plug. :(
    Ridley Fenix SL
  • singleton
    singleton Posts: 2,523
    fat_tail wrote:
    the hole doesn't seem to be too big. disappointed with tubeless experience so far. that was 510 km in 2 weeks and 1 flat which the sealant didn't plug. :(

    That doesn't sound good. I'm just making the switch over to tubeless myself and am hoping for better than that.
  • fat_tail
    fat_tail Posts: 786
    Singleton wrote:
    fat_tail wrote:
    the hole doesn't seem to be too big. disappointed with tubeless experience so far. that was 510 km in 2 weeks and 1 flat which the sealant didn't plug. :(

    That doesn't sound good. I'm just making the switch over to tubeless myself and am hoping for better than that.

    Just spent about 40 minutes this morning on the tyre. took out the inner which I had put in temporarily last night to get me home. inflated to 40psi tyre seem to be holding pressure. so deflated, added some more sealant to replace the stuff I had to discard last night, re-seated the tyre pumped up to 90 psi. tyre seemed to be holding pressure so I left it standing with the hole on the floor to allow the sealant to penetrate the hole and do it's magic stuff. tyre seemed to be holding fine but then after about 5 minutes the now familiar "psssst" and sealant getting sprayed everywhere. tyre off, inner tube in, inflated, rode to work, ordered some "anchovies" from Evans, pickup tomorrow. will try to fix.
    Ridley Fenix SL

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