Tubbie Question

[stewie911]

So I finally glued my tubbies yesterday. (Have never glued tubbies or ridden tubbies before)

 

Is there any way to know if I did a good job? Really don't want my tyre flying off the rim at high speeds around a corner.

 

I used continental glue and gave two coatings to the rim and tubby. Tubbies have been glued before.

[Thug]

I have/had the same concerns Stewie.

 

I followed the Park Tool guide and took the rims out for a ride on Friday morning. I doubt I'll find any worse roads than those we rode so I'm a little more at ease. The proof will be descending a winding pass at 80 kmph.

 

I did try though to put some Tufo Sealant in the tubbies but ended up with more on the floor, so gave that up as a bad job.

Edited January 16, 2011 by Thug

[stewie911]

Thanks, I'll be carefull when putting in the tufo sealant

 

My plan is to start out easy at first and work my way up to fast descends on them

[Christie]

Some folks say that you can just put the tubby on the rim, and pump it hard without any glue, and ride it like that. I'm not that brave, but I'm sure if you have uesd glue, seated them ok, and pump em to 100 psi or so before you ride, they will be fine.

 

Merv (Mervin Dinkelman cycles) did the best job of glueing tubbies I have seen up to now. He uses a very small amount of glue - a little bead around the middle. (he does not fill the whole rim with glue.)

[Christie]

PS - to put Tufo in, unscrew the valve and use a syringe (without needle) to squeeze it into the tubbie via the valve. Buy the syringe with the biggest nozzle that can fit into the valve.

[stewie911]

Thanks Christie. Where is Mervin Dinkelman cycles? How much do they charge to do it. I have a set of ultra light tufo tubbies that I'll use in the future, but don't feel like going through the hassle to glue them again.

 

 

I've got a stans syringe with a pipe attached that I use to put stans in my tubeless wheels. I'll use that

[Thug]

I've got a stans syringe with a pipe attached that I use to put stans in my tubeless wheels. I'll use that

 

 

I tried that one as well.

 

The problem I had was that with the Tufo sealant, some of the rubber had coagulated and then blocked the valve hole. No matter how hard I pushed down on the Stans syringe, I couldn't shift that large piece. I ended up unscrewing the attached pipe from the valve and most of the Tufo sealant landed up on the floor.

 

 

edit: after much perseverance, I've just managed to fill up the tubbie with the Tufo sealant.

Edited January 16, 2011 by Thug

[The_Break]

So I finally glued my tubbies yesterday. (Have never glued tubbies or ridden tubbies before)

 

Is there any way to know if I did a good job? Really don't want my tyre flying off the rim at high speeds around a corner.

 

I used continental glue and gave two coatings to the rim and tubby. Tubbies have been glued before.

 

If you have applied the glue evenly to every square mm of contact between tyre and rim and have allowed for sufficient time to cure (24hours) then you should be good to go.

 

If you try with all your might to roll the properly inflated tyre off the rim you will not want to see any part of it lift up. If the tyre lifts in an area where you can see the glue want to tear and create a gap that is the weak point. Fill it in.

 

 

Riding forces are higher than what you can press with your hands so if it lifts here it will lift on the road. Having said that though, I have never rolled a tubby that I have checked this way and it is how most experienced people check tubbies.

[ti guy]

To seal your tubbies, rather use Sludge All Terrain sealant; due to the absence of ammonia, it does not coagulate and never blocks off the valve. I use it in my tubbies and mtb tubeless tyres and it works like a charm!

[stewie911]

Noted. Thanks guys

[Christie]

Thanks Christie. Where is Mervin Dinkelman cycles? How much do they charge to do it.

 

Merv's shop used to be in Hennops Park, Centurion. Sadly, they closed down in 2010. If I temember correctly, he charged R50 to glue a tubby.

[The_Break]

To seal your tubbies, rather use Sludge All Terrain sealant; due to the absence of ammonia, it does not coagulate and never blocks off the valve. I use it in my tubbies and mtb tubeless tyres and it works like a charm!

 

Why in the world would youu want to use sealant in a perfectly good set of tubbies???? It goes against the whole concept!!!

 

If you can afford to ride tubbies then just replace them. By the time they seal you are not going to want to ride them anymore.