Warning Continental Grand Prix 5000 S TR Leak - Bike Forums

Bike Forums > Bike Forums > Bicycle Mechanics > Warning Continental Grand Prix 5000 S TR leak Username Remember Me? Password By logging into your account, you agree to our Terms of Use and Privacy Policy, and to the use of cookies as described therein. Register Forgot Password? Register FAQ Calendar Today's Posts Search Vendor Directory Notices Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance. Search Forums Show Threads Show Posts Advanced Search Find All Liked Posts Go to Page... Warning Continental Grand Prix 5000 S TR leak Reply Subscribe Thread Tools Search this Thread 03-25-22 | 12:39 PM #1 Barry2 Thread Starter . Joined: Sep 2019 Posts: 2,547 Likes: 1,586 From: SF Bay Area Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-) Continental Grand Prix 5000 S TR leak... FIXED ------------------------------------------------------------------------------------------------------------------------------------------------------------------- EDIT: TLDR - SUMMARY OF THIS THREAD Installed two Conti GP 5000 S TR onto my Mavic Ksyrium alloy (Fore, no rim tape) rims with 35ml Stans No Tubes sealant. I've been installing GP 5000TL this way for 8,000 miles without issues. Both front and rear 5000 S TR dropped 30-40 PSI overnight despite being ridden and given days to finalize the seal. Dismounted tires, cleaned Stans from tire and rim, remounted the same tires with 35ml Orange Seal Regular. Front tire dropped 5 PSI overnight. Rear tire dropped 10 PSI but has yet to be ridden (I suspect this will improve) Edit…with about 100 miles on them, overnight loss is now minimal. -------------------------------------------------------------------------------------------------------------- BEGIN ORIGINAL POSTING... I've been using Conti GP 5000 TL for the last 8000 miles on my Mavic Ksyrium Elite wheels. The significance of the wheel is that they are Alloy and do not have a Rim Tape. So, no leaks there. Mavic calls this "Fore" for anyone interested My GP 5000 TL with 35ml "Stans No Tubes" would lose a couple PSI overnight, no big deal. Recently installedGP 5000 S TR. Even scrubbed the wheels with a wet bristle brush to remove any old sealant. The "S TR" version being the new Tubeless replacement version of the GP 5000 TL. The GP 5000 S TR leak. Both front and rear wheels (still the same Ksyrium) are losing 20-30 PSI overnight. And have been doing so for several days. I've not dunked them like in this video, but I suspect the same issue. Leaking EDIT: The now non available video was showing 5000 S TR bubbling under water through the sidewalls. Unhappy Continental Customer Barry Last edited by Barry2; 10-07-22 at 11:32 AM. Reply 0 0 Barry2 View Public Profile Find More Posts by Barry2 View iTrader Profile 03-25-22 | 01:59 PM #2 smashndash Senior Member Joined: Feb 2018 Posts: 1,410 Likes: 344 Bikes: 2017 Specialized Allez Sprint Comp How much sealant have you added? The old GP5000 didn't need sealant to seal. The new one does. I would add a bit more sealant, keep the tire deflated, and roll it around a bit. Then add air and ride around a bit. edit: seems all the comments on your video say the same. This is certainly not indicative of a design flaw. Last edited by smashndash; 03-25-22 at 02:03 PM. Reply 0 0 smashndash View Public Profile Find More Posts by smashndash View iTrader Profile 03-25-22 | 02:13 PM #3 Barry2 Thread Starter . Joined: Sep 2019 Posts: 2,547 Likes: 1,586 From: SF Bay Area Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-) I've always added 35ml Stans No Tubes. I've got ~8,000 miles on 5000 TL and had to replace several due to road damage. Never an issue with sealing after cleaning the rim. I've contacted Continental to see what they say. My hope is that this is just a bad batch and not a design flaw. I've ridden them and they ride nice. Barry Reply 0 0 Barry2 View Public Profile Find More Posts by Barry2 View iTrader Profile 03-25-22 | 02:36 PM #4 vespasianus Senior Member Joined: Jul 2019 Posts: 881 Likes: 545 From: In the south but from North Bikes: Turner 5-Spot Burner converted; IBIS Ripley, Specialized Crave, Tommasini Sintesi, Cinelli Superstar, Tommasini X-Fire Gravel, Tommasini Mach Ti Gravel Quote: Originally Posted by Barry2 I've always added 35ml Stans No Tubes. I've got ~8,000 miles on 5000 TL and had to replace several due to road damage. Never an issue with sealing after cleaning the rim. I've contacted Continental to see what they say. My hope is that this is just a bad batch and not a design flaw. I've ridden them and they ride nice. Barry Try some glitter in your tire. And you might have to use much more sealant, like 100ml. If you have air bubbles coming out but not sealant, well that means you don't have enough sealant. Reply 0 0 vespasianus View Public Profile Find More Posts by vespasianus View iTrader Profile 03-25-22 | 02:40 PM #5 Barry2 Thread Starter . Joined: Sep 2019 Posts: 2,547 Likes: 1,586 From: SF Bay Area Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-) I'll put glitter on my eyelids before I put it in my tires. And I'm not putting glitter on my eyelids! I'll wait for Continentals reply, then experiment if need be. Barry Reply 1 1 Andrew R Stewart Barry2 View Public Profile Find More Posts by Barry2 View iTrader Profile 03-25-22 | 03:16 PM #6 squirtdad Senior Member Joined: Jul 2006 Posts: 11,368 Likes: 4,736 From: San Jose (Willow Glen) Ca Bikes: Kirk Custom JK Special, 86 De Rosa Pro, '84 Team Miyata,(dura ace old school) 80?? SR Semi-Pro 600 Arabesque Quote: Originally Posted by Barry2;22450875[b ]I'll put glitter on my eyelids[/b] before I put it in my tires. And I'm not putting glitter on my eyelids! I'll wait for Continentals reply, then experiment if need be. Barry Pictures no help on issue I am tube or tubular guy do like my 28mm gp5000 though __________________ Life is too short not to ride the best bike you have, as much as you can. Reply 0 0 squirtdad View Public Profile Find More Posts by squirtdad View iTrader Profile 03-25-22 | 05:18 PM #7 scottfsmith I like bike Joined: Feb 2021 Posts: 675 Likes: 289 From: Merry Land USA Bikes: Roubaix Comp 2020 There is another thread going now on this exact same topic: Tubeless: PSI loss during ride? Reply 0 0 scottfsmith View Public Profile Find More Posts by scottfsmith View iTrader Profile 03-25-22 | 06:23 PM #8 tFUnK Senior Member Joined: Jun 2002 Posts: 3,924 Likes: 589 From: San Jose, CA Bikes: Too many bikes, too little time to ride Since it's leaking from the bead and not through the sidewalls, have you tried seating them first with a tube and pumping them up to a high psi to allow them to stretch/settle? Reply 0 0 tFUnK View Public Profile Visit tFUnK's homepage! Find More Posts by tFUnK View iTrader Profile 03-25-22 | 06:34 PM #9 Barry2 Thread Starter . Joined: Sep 2019 Posts: 2,547 Likes: 1,586 From: SF Bay Area Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-) tFUnK What makes you think it’s at the bead ? Barry Reply 0 0 Barry2 View Public Profile Find More Posts by Barry2 View iTrader Profile 03-25-22 | 07:44 PM #10 vespasianus Senior Member Joined: Jul 2019 Posts: 881 Likes: 545 From: In the south but from North Bikes: Turner 5-Spot Burner converted; IBIS Ripley, Specialized Crave, Tommasini Sintesi, Cinelli Superstar, Tommasini X-Fire Gravel, Tommasini Mach Ti Gravel I am starting to believe there is a reason why some people have no issue with tubeless tires and other do.... Reply 1 1 oldbobcat vespasianus View Public Profile Find More Posts by vespasianus View iTrader Profile 03-25-22 | 07:55 PM #11 Barry2 Thread Starter . Joined: Sep 2019 Posts: 2,547 Likes: 1,586 From: SF Bay Area Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-) Quote: Originally Posted by vespasianus I am starting to believe there is a reason why some people have no issue with tubeless tires and other do.... vespasianus , So rather than an ambiguous innuendo why don’t you spell it out ? please do feel free to elaborate Barry Reply 0 0 Barry2 View Public Profile Find More Posts by Barry2 View iTrader Profile 03-25-22 | 10:43 PM #12 tFUnK Senior Member Joined: Jun 2002 Posts: 3,924 Likes: 589 From: San Jose, CA Bikes: Too many bikes, too little time to ride Quote: Originally Posted by Barry2 tFUnK What makes you think it’s at the bead ? Barry Thought this was implied by the video you had linked to? I guess you did not confirm this, yet? Edit: ok it was hard to see in the video where the bead was exactly, so it could be leaking through the sidewall. Reply 1 1 Barry2 tFUnK View Public Profile Visit tFUnK's homepage! Find More Posts by tFUnK View iTrader Profile 03-25-22 | 10:43 PM #13 smashndash Senior Member Joined: Feb 2018 Posts: 1,410 Likes: 344 Bikes: 2017 Specialized Allez Sprint Comp Quote: Originally Posted by Barry2 I've always added 35ml Stans No Tubes. I've got ~8,000 miles on 5000 TL and had to replace several due to road damage. Never an issue with sealing after cleaning the rim. I've contacted Continental to see what they say. My hope is that this is just a bad batch and not a design flaw. I've ridden them and they ride nice. Barry hm interesting. Yeah 35ml should be enough. How old is your bottle of sealant? I had an old bottle of sealant and my vittoria would lose similar pressure. But then I bought a new bottle of sealant and did the thing I suggested above. Now it holds really well. Reply 0 0 smashndash View Public Profile Find More Posts by smashndash View iTrader Profile 03-26-22 | 05:42 AM #14 dsaul Senior Member Joined: Jan 2013 Posts: 2,366 Likes: 920 From: South Jersey In my experience, TL(tubeless) tires have a sealed sidewall that doesn't require sealant. TR(tubeless ready) tires have a porous sidewall that requires a tube or sealant to seal the sidewall. Stans is not particularly good at sealing the sidewalls and tends to weep the red carrier liquid through the sidewalls, even after they are sealed. 35ml of sealant is probably not enough to seal the sidewalls and still have some left for punctures. I would use about 60ml. I have found Orange Seal(original formula) to be much better at sealing the sidewalls without weeping and an overall better sealant than Stans. Reply 1 1 Barry2 dsaul View Public Profile Find More Posts by dsaul View iTrader Profile 03-26-22 | 08:37 AM #15 Barry2 Thread Starter . Joined: Sep 2019 Posts: 2,547 Likes: 1,586 From: SF Bay Area Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-) Quote: Originally Posted by dsaul …… Stans is not particularly good at sealing the sidewalls and tends to weep the red carrier liquid through the sidewalls, even after they are sealed. 35ml of sealant is probably not enough to seal the sidewalls…….. well that would answer a lot. Assuming I’m not suffering from a bad batch of tires, the leaking issue being sealant specific would explain why all S TR users are not up in arms. Ive always used Stan’s and never had a reason to change, this might be it. thanks Barry Reply 0 0 Barry2 View Public Profile Find More Posts by Barry2 View iTrader Profile 03-26-22 | 09:24 AM #16 GhostRider62 Senior Member Joined: Apr 2021 Posts: 4,081 Likes: 2,103 Quote: Originally Posted by Barry2 well that would answer a lot. Assuming I’m not suffering from a bad batch of tires, the leaking issue being sealant specific would explain why all S TR users are not up in arms. Ive always used Stan’s and never had a reason to change, this might be it. thanks Barry There are not too many GP5000S TR users out there, yet. In my specific issue with these tires, they do not leak much overnight but they do leak and they leak a lot during a ride, perhaps 2 psi or more per hour. Switching from Orange Endurance to Regular has helped my situation. I have not made measurements yet. It has been 10 frustrating days with these tires and I am sick of tubeless, it solves a problem that does not exist while creating its own challenges. It is very clear the air is escaping from the sidewalls, it is plain as day when the tires are immersed in a bath tub of water. Putting soapy water on the bead, valve or spokes gets no bubbles. If it turns out that a prolonged (a week) period of time is needed to get the sidewalls sealed and if they do not plug up with Stans or Orange Endurance, Conti hasn't done their homework. At the minimum, they need to put that requirement in some instructions. Yes, I have rotated the wheels 90 degrees on both sides a million times and yes, I have a crap load of brand new sealant inside. Reply 0 0 GhostRider62 View Public Profile Find More Posts by GhostRider62 View iTrader Profile 03-26-22 | 09:35 AM #17 Barry2 Thread Starter . Joined: Sep 2019 Posts: 2,547 Likes: 1,586 From: SF Bay Area Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-) I’m off out today and just pumped tires. Rear lost 40 psi overnight. Front lost 30 psi overnight. I’ve found Orange Regular in stock locally and will buy today. I will remove tire, scrub rim, scrub inside of tire and reseal with Orange Regular. I hope to report back tomorrow. Barry Reply 0 0 Barry2 View Public Profile Find More Posts by Barry2 View iTrader Profile 03-26-22 | 10:19 AM #18 scottfsmith I like bike Joined: Feb 2021 Posts: 675 Likes: 289 From: Merry Land USA Bikes: Roubaix Comp 2020 You might want to look at the other thread I linked above, that guy tried orange regular and it was better than what he used before but it was still leaking. I would have a look at my comment on that other thread about setting the tires on their sides to give the sealant a good long time to get into the sidewalls.. worked for me on a different brand of tire. Reply 0 0 scottfsmith View Public Profile Find More Posts by scottfsmith View iTrader Profile 03-26-22 | 10:28 AM #19 masi61 Senior Member Joined: Oct 2005 Posts: 3,891 Likes: 524 From: SW Ohio Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium In the video, all the air bubbles are adhering to the rim edge. I don't see clear evidence of bubbling from the sidewalls themselves, just bubbling from the bead. I would think that is is not uncommon to think you have done a proper tubeless tire install only to find that the bead hasn't "popped" fully into place. How much pressure are you using to mount the tires? When they start to hold air do they "pop" definitively? Just curious. Reply 0 0 masi61 View Public Profile Find More Posts by masi61 View iTrader Profile 03-26-22 | 11:15 AM #20 GhostRider62 Senior Member Joined: Apr 2021 Posts: 4,081 Likes: 2,103 The air coming out of my sidewalls looks just like this video but not nearly as bad. You Tube Reply 0 0 GhostRider62 View Public Profile Find More Posts by GhostRider62 View iTrader Profile 03-27-22 | 06:24 AM #21 scottfsmith I like bike Joined: Feb 2021 Posts: 675 Likes: 289 From: Merry Land USA Bikes: Roubaix Comp 2020 That is similar to what my Vittoria Terreno Dry looked like. Definitely a factory return. I had no problems getting my money back. After seeing all these threads I decided to mount one of my S TR's (I was waiting for a rear rim replacement before swapping tires as I was wanting to do both wheels together). I just did a water test and absolute zero leaks found (this was after adding sealant and letting sit; should have done an initial test as well). The main problem I had was getting the suckers on the rims, they are a very tight tire compared to others I have mounted on my Roval CLX50 rims. Reply 1 1 GhostRider62 scottfsmith View Public Profile Find More Posts by scottfsmith View iTrader Profile 03-27-22 | 08:37 AM #22 Barry2 Thread Starter . Joined: Sep 2019 Posts: 2,547 Likes: 1,586 From: SF Bay Area Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-) Quote: Originally Posted by scottfsmith That is similar to what my Vittoria Terreno Dry looked like. Definitely a factory return. I had no problems getting my money back. After seeing all these threads I decided to mount one of my S TR's (I was waiting for a rear rim replacement before swapping tires as I was wanting to do both wheels together). I just did a water test and absolute zero leaks found (this was after adding sealant and letting sit; should have done an initial test as well). The main problem I had was getting the suckers on the rims, they are a very tight tire compared to others I have mounted on my Roval CLX50 rims. Which sealant did you use? Oh, I can help you get them in the rim….. Getting that last 10-12” on the rim is tough. As you lever on the left, the right moves around the rim away from you. Bind the right side to the rim with 2’ of parachute cord, now it can’t run away. Then lever the left side onto the rim 1” at a time. If you try to lever too much on at a time it just won’t go. So just 1” at a time! Barry Reply 0 0 Barry2 View Public Profile Find More Posts by Barry2 View iTrader Profile 03-27-22 | 08:51 AM #23 scottfsmith I like bike Joined: Feb 2021 Posts: 675 Likes: 289 From: Merry Land USA Bikes: Roubaix Comp 2020 Quote: Originally Posted by Barry2 Which sealant did you use? I am using the new Silca stuff: https://silca.cc/pages/ultimate-sealant . I don't think for a weeping sidewall that it matters much, it is a standard latex-based carrier. The main thing new in this sealant is the kind of particulate added to seal larger leaks -- for sealing punctures on the road this new stuff looks like it will be awesome. I recently switched to their Super Secret lube and generally am very impressed with their R&D. I don't quite get what you are doing with the cord, are you running it in the trough of the rim to keep the side already in there centered? The odd thing for me is the hardest bit was getting the first bead on, not the final one. Usually I don't even think about that first step, it just pops on. Here I found I had to do it the opposite way I normally did - normally I would put the first bead on in the same direction I put the final one on, rim starts on the inside of the bead and pop the bead over the rim to get one side of the tire all in. I had to do the opposite, outside of bead is outside the rim. Once I figured that out the final bead was not super hard although I did need to use tire levers. Reply 0 0 scottfsmith View Public Profile Find More Posts by scottfsmith View iTrader Profile 03-27-22 | 08:56 AM #24 Barry2 Thread Starter . Joined: Sep 2019 Posts: 2,547 Likes: 1,586 From: SF Bay Area Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-) Bind between two spokes, around the rim and tire….. tight. It will stop the tire bead coming off the rim as you lever the other side onto the rim, towards the binding Barry Reply 0 0 Barry2 View Public Profile Find More Posts by Barry2 View iTrader Profile 03-27-22 | 03:43 PM #25 Barry2 Thread Starter . Joined: Sep 2019 Posts: 2,547 Likes: 1,586 From: SF Bay Area Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-) Quote: Originally Posted by Barry2 I’m off out today and just pumped tires. Rear lost 40 psi overnight. Front lost 30 psi overnight. I’ve found Orange Regular in stock locally and will buy today. I will remove tire, scrub rim, scrub inside of tire and reseal with Orange Regular. I hope to report back tomorrow. Barry Oh look I’ve quoted myself. The time Space Continuum is going to take a hit on this one. So as promised, I scrubbed the front rim and inside of the tire, then reseated with 35ml Orange Regular Sealant. Bearing in mind all I did with the front was roll it around a bit. The rear has had several days and been ridden a couple of times. Last night pumpedem both to 85 psi. and the results are in Rear lost 45 psi overnight using Stan’s No Tubes Front lost 5 psi using Orange Regular Sealant. Who’da-thunk sealant would make that much difference. I’ll scrub and change the rear tomorrow. Barry Reply 2 2 smashndash scottfsmith Barry2 View Public Profile Find More Posts by Barry2 View iTrader Profile Thread Tools Show Printable Version Search this Thread Advanced Search Thread Tools Show Printable Version Email this Page Advanced Search Reply Closed Thread Share

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