Tubular glue -Arrrrgh !

redmaxi

It's driving me nuts, just glued on a tyre after doing everything 'by the book' and now an hour later the tyre is lifting off the rim at the valve.
I applied a light layer of glue to rim and tyre first, left 'em for 24 hrs then another to the rim left it for 24hrs and finally one more layer to rim left for ten minutes and on with the tyre. The mess is depressing me and now it looks like I'll have to rip it off and start all over again.
Can I re-attempt it ?

quintana2

redmaxi wrote: »

It's driving me nuts, just glued on a tyre after doing everything 'by the book' and now an hour later the tyre is lifting off the rim at the valve.
I applied a light layer of glue to rim and tyre first, left 'em for 24 hrs then another to the rim left it for 24hrs and finally one more layer to rim left for ten minutes and on with the tyre. The mess is depressing me and now it looks like I'll have to rip it off and start all over again.
Can I re-attempt it ?

Thats a lot of glue!! I have glued on tubs on new rims in 20 min. start by stretching the tub, say 3 to 4 days on the rim pumped to say 140psi. when you take it off apply a layer of glue to the rim and leave it to one side to dry while you put a layer on the tub. when thats on the rim should be nearly touch dry. lash on another layer on the rim put on the tub working away from the valve, pump to about 60psi work the tub around the rim to make sure it sitting right . pump as hard as you can race tomorow! Keep the pressure up on the tub for a is few days to make sure the bond is strong. Its a good idea to rub a new rim with fine sand paper to provide a keyfor the glue. new vittoria tubs have a new valve adaptor fitting so they are prone to sticking up at the valve seat . conti tubs fit a lot closer but are harder to fit. rim cement is basically contact adhesive so you dont need to leave it for 24hrs. I have puntured in races and raced on a new tub the following day. petrol on a rag will clean up your mess. Start again and enjoy it gets easier:D

IM0

quintana2 wrote: »

Thats a lot of glue!! I have glued on tubs on new rims in 20 min. start by stretching the tub, say 3 to 4 days on the rim pumped to say 140psi. when you take it off apply a layer of glue to the rim and leave it to one side to dry while you put a layer on the tub. when thats on the rim should be nearly touch dry. lash on another layer on the rim put on the tub working away from the valve, pump to about 60psi work the tub around the rim to make sure it sitting right . pump as hard as you can race tomorow! Keep the pressure up on the tub for a is few days to make sure the bond is strong. Its a good idea to rub a new rim with fine sand paper to provide a keyfor the glue. new vittoria tubs have a new valve adaptor fitting so they are prone to sticking up at the valve seat . conti tubs fit a lot closer but are harder to fit. rim cement is basically contact adhesive so you dont need to leave it for 24hrs. I have puntured in races and raced on a new tub the following day. petrol on a rag will clean up your mess. Start again and enjoy it gets easier:D

and people wonder why we use clinchers

Capt'n Midnight

me@ucd wrote: »

and people wonder why we use clinchers

back in the 80's our roads were so bad that only a lunatic would use tubs, remember hearing of one guy on the wicklow 200 the year after hurricane Charlie and he was nearly in tears because the roads were washed out and he was down to the last one - even Sean Kelly said that our roads weren't good enough for tubs.


anyone know where you can buy needle and thread to stitch the sidewalls up again ?

redmaxi

quintana2 wrote: »

Thats a lot of glue!! I have glued on tubs on new rims in 20 min. start by stretching the tub, say 3 to 4 days on the rim pumped to say 140psi. when you take it off apply a layer of glue to the rim and leave it to one side to dry while you put a layer on the tub. when thats on the rim should be nearly touch dry. lash on another layer on the rim put on the tub working away from the valve, pump to about 60psi work the tub around the rim to make sure it sitting right . pump as hard as you can race tomorow! Keep the pressure up on the tub for a is few days to make sure the bond is strong. Its a good idea to rub a new rim with fine sand paper to provide a keyfor the glue. new vittoria tubs have a new valve adaptor fitting so they are prone to sticking up at the valve seat . conti tubs fit a lot closer but are harder to fit. rim cement is basically contact adhesive so you dont need to leave it for 24hrs. I have puntured in races and raced on a new tub the following day. petrol on a rag will clean up your mess. Start again and enjoy it gets easier:D

Great advice there (especially bout the petrol), thanks a mill. They are Vittoria tubs so at least I know it's not just me. I applied some extra glue at the valve, left it get tacky, pumped it up and left a weight on the valve area for two hours. She is stuck good now.

Canis Lupus

me@ucd wrote: »

and people wonder why we use clinchers

Christ, totally.... What a fuss to put a tyre on.

tunney

quintana2 wrote: »

Thats a lot of glue!! I have glued on tubs on new rims in 20 min.

Then you've not glued a tub on properly.

quintana2 wrote: »

start by stretching the tub, say 3 to 4 days on the rim pumped to say 140psi. when you take it off apply a layer of glue to the rim and leave it to one side to dry while you put a layer on the tub. when thats on the rim should be nearly touch dry. lash on another layer on the rim put on the tub working away from the valve, pump to about 60psi work the tub around the rim to make sure it sitting right . pump as hard as you can race tomorow! Keep the pressure up on the tub for a is few days to make sure the bond is strong. Its a good idea to rub a new rim with fine sand paper to provide a keyfor the glue. new vittoria tubs have a new valve adaptor fitting so they are prone to sticking up at the valve seat . conti tubs fit a lot closer but are harder to fit. rim cement is basically contact adhesive so you dont need to leave it for 24hrs. I have puntured in races and raced on a new tub the following day. petrol on a rag will clean up your mess. Start again and enjoy it gets easier:D

Emmmm I would hate to see the CRR of that tub.

tunney

me@ucd wrote: »

and people wonder why we use clinchers

For unsupported road races, definitely clinchers.

For TTs and triathlons - definitely tubs. They are faster.

*Que links to flawed research. Research that is presently getting shredded on other forums.

quintana2

Well tunney i have not rolled a tub yet . i have 3 sets never had any issues . I have had a problem however with a disc which had a tub fitted at a bike shop the glue did not take and the tub rolled on the rim and the valve pulled through the carbon:mad: result new disc . the moral of the story plenty of glue!! I have watched bike mechanics on the ras change a tub in less than 10 min pump it, on the bike and race them hard ! the following day.

quintana2

me@ucd wrote: »

and people wonder why we use clinchers

why do you use clinchers? tubs are lighter, more comfortable, roll better are faster and no risk of pinch flats

quintana2

tunney wrote: »

For unsupported road races, definitely clinchers.

For TTs and triathlons - definitely tubs. They are faster.

*Que links to flawed research. Research that is presently getting shredded on other forums.

for unsupported road races still tubs! unsupported + flat= race over!

mloc123

quintana2 wrote: »

for unsupported road races still tubs! unsupported + flat= race over!

But a long walk home, maybe. At least in a tri or tt worst case will be a 20k walk.