Question re fitting tubs

I have to fit a tub on to the wife's new carbon rims - never done it before, and she wants to race on it tomorrow. Currently the tub is on the rim stretching (has been there for three hours or so).

2 questions -

Is one layer of glue on rim and tub sufficient?
How long do we need to leave between gluing and riding?

I have tried to look for threads on technique, but there don't seem to be any, so any other tips etc would be greatly appreciated.

Thanks
Willo

get tape!

i would tape. see park tools for gluing methods http://www.parktool.com/repair/readhowto.asp?id=101

Racing on the road or track?

so how do I tape? Stratton's gave me a roll of yellow tape (as they said, "just in case")

I used the methods given on the tufo website http://www.tufo.com/ - go to instruction and scroll down to the taping bit.

Or try googling / youtubing it

racing on the road - Chertsey

new rims need a few coats of glue+ drying time, new tubs need a coat of glue+ drying.

after the final coats you need at least 24hours before riding.

sounds like you need to use the tape!

I ride tubulars everyday.

You'll get different opinions, but I wouldn't recommend racing with tape only, especially on new rims.

You've just enough time to glue the tires securely.

Two layers of glue on the rims, with a few hours in between for drying.

At least one coat on the tires as well.

Some people say glue on rims and tires with tape in between but I've never tried that.

After the glue has dried to a tackiness mount the tires and inflate to full pressure.

Make sure you test them on the morning.

Good luck to the wife!

You'll get different opinions, but I wouldn't recommend racing with tape only, especially on new rims.

You've just enough time to glue the tires securely.

Going out shortly - sounds as tho she'll be racing on her old ultegra clinchers!! Think I'd better do it properly and get her out and racing on the new wheel next week. Fook knows how she'd react if the tyre slid off going round a corner....

Smart move!

I only use one layer of glue and have never had a prob, re-glue is just one coat. I find the secret is to do the job in a warm room, or outddors in summer sun even better, and allow the glue to go tacky and whack on the tub and gently inflate- full inflation squeezes out the glue and makes a mess.

Son & I've ridden Manchester/Calshot/Newport umpteen times with no probs ever, and I've ridden the road for umpteen miles in races before I switched to clinchers- still prefer tubs for TT's though. Oh I did tubs on a tandem too, just the same, no probs.

Economic & effective is my view.

I accept there are all sorts of ways to glue, just don't take me back to Shellac though....

PS- did you know the glue deteriorates over time ie disappears, so its best to re-glue after say a year.

Now I used a tape once, and the bike was carried outside the car in the pouring rain, and hey presto the tub moved round on the rim while riding on the track

Is there any particular type/brand of tape you would reccommend, I'm about to fit some tubs for the first time too.

Some people say glue on rims and tires with tape in between but I've never tried that.

Glue AND tape is very good. I do this with my CX tubular wheels.
I don't think it's necessary for track.
It's very hard to keep 34mm tubulars on your narrow (especially carbon) rims. Not to mention wet, muddy riding conditions, riding parallel on banks and the lots of water and hi pressure cleaners that are used to clean up the bike.

Is there any particular type/brand of tape you would reccommend, I'm about to fit some tubs for the first time too.

Tufo extreme tape.

Strong like water, not brittle like steel.

Just glued some new(ish) tubs for the first time ever !

2 layers of glue (Vittoria Mastik) on both rim and tyre (30mins between coats) and slid the tub on.

straightened it and it looks perfect! well chuffed.

Only thing is there is glue all over the sidewalls and some around the rims which looks messy.

acetone does nothing to shift it, so i think i'll let it dry and pick it off in the morning.

got a problem. I have have mavic mach 2 cd2 rims and purchased some 26" vittoria tubular tyres however they dont strech far enough. the outside diameter of the the rim is about 630mm . So is this the correct tyre to use . Help appreciated cheers

630mm?! That's 27" rim. I'm sure you measured it wrong, by the way.

28" for 700c (622mm), 26" for 650c (571mm)

Tufo tape ftw. You can ride straight away.

Your tubs are the wrong size

Yep, you've bought the smaller of the two common sizes..

Full-sized tubulars fit rims of the same diameter as 622 mm (700c) clinchers. This size is sometimes referred to as "28 inch" or "700". It is also, confusingly, sometimes referred to as "27 inch." The "27 inch" designation is inaccurate and obsolete, but you'll sometimes run into it in older printed material.
In clincher tires, there is a real difference between "700c" and "27 inch" sizes, but for tubulars this is a false distinction. Whenever you see mention of "27 inch tubulars" the writer is actually referring to standard full-sized tubulars, as used on most racing bikes.

"26 inch" or "650" tubulars are smaller, mainly used on time-trial or motorpacing track bikes.
"24 inch", "22 inch" "20 inch" and "18 inch" tubulars are sizes formerly used for children's racing bikes, but pretty much extinct these days.

http://www.sheldonbrown.com/tire-sizing.html#tubulars

thanks for your help so i need to buy 700c tubular tyres then

Ja, 700C/27" (these are the same size in tubs)

Or** 28"** if you are buying Vittoria Rally or Continental Giro

I have Vit rally tubs on my wheels, anyone have any idea of how puncture resistance is? Thinking of using my old track wheels for everyday use.

Wouldn't recommend it, specially if you ever skid. In my experience puncture-resistant tubs tend to have none of the benefits of a good tubular tyre anyway, more hassle than they're worth.

I have Vit rally tubs on my wheels, anyone have any idea of how puncture resistance is? Thinking of using my old track wheels for everyday use.

From my experience they last about 22 miles if you commute through East London.
I still like it.