patentcad

What a mess. I have glue on my hands, my pants, but happily, the tire mounted up just fine.

1.) Stretch and mount the tire without glue overnight, inflate to 120 psi.

2.) The next day, take the tire off, spread a thin coating of glue on the rim. Let it dry for 3-4 mins.

3.) Spread thin coating on the tire mounting surface, let it dry for a couple of mins.

4.) Mount tire and inflate.

The glue instructions say let it dry for 15 mins. and put a 2nd coat on the rim surface, but my LBS has been doing it as described above, always seems to result in a perfectly cemented tire.

I will try to be neater next time. But mission accomplished.

mike9903

You are a brave man PCad, I would rather have the ability to blame someone else when my tire rolls off.

Busta Quad

You should put a baggy on your hand and then spread the glue - no mess.

https://www.beginnertriathlete.com/cm...articleid=1460

patentcad

Good idea, that's what I'll try next time.

txvintage

I went 1 for 2 this week. One went rogue over night and rolled on the rim somehow.

My wife may be looking for insurance money though. I think I blame her, lol.

The Carpenter

I prefer latex gloves and an acid brush.

sced

Let us know when you repair one. Gluing is easy. I patched one after a 30-year layoff and it took much longer and the restitching wasn't as precise as I remember.

FlashBazbo

Congrats, pcad! I'm a long way from a reputable LBS, so anything I do has to be do-it-yourself-able. I've been thinking of going tubular by the end of the '09 season. You may have just given me the encouragement I need to make the switch on my road bike.

After all, if pcad can do it . . . .

patentcad

I did that once in the 90's. Not worth the hassle. I'll send them to the guy in FL for $18.

But yes, gluing is easy. I'll find out if I did it wrong if I roll that bad boy. But that's more likely to happen in a crit. And I may be doing a few this summer. Hey, it's rubber cement, the method I used should work. I've never rolled a tubie. I don't want to.

I'm telling you boys, PBK, two Conti Sprinters, $75 shipped. Can't beat that pricing.

Busta Quad

I'll give mine to a junior rider who is hurting for money so he can patch and use and just go for a new one; $39 at PBK.

DM4

This is how I have been doing it for over 30 years and have never rolled a tire using this method and never make a mess. I stretch the tire on a rim at full pressure for a day or two. I put a coating of glue on the rim only if the rim has never been previously glued, otherwise I leave the rim alone. I put a coating of glue on the tire and let it dry for a day. I then mount the tire on the rim. I then roll a small section of the tire off the rim (about 8-10 inches) , place a thin coat of glue on the rim, and then roll the section of tire back onto the rim. You can lift the tire a bit as you roll it back onto the rim to prevent the glue from smearing onto the sidewall of the tire. Continue this procedure a section at a time until the entire tire has been glued. Then pump the tire to full pressure and let it dry for a day.

EivlEvo

Their prices on tubs are crazy low right now... too bad the vittorias I want only come in a 21 and reynolds says use a 22 minimum...

I prefer either the latex finger condoms, or nitrile gloves fwiw.

patentcad

My LBS hasn't had a customer roll a tire, I used their methodology. My pal Don does LESS (he just puts one coat on the rim, none on the tire) and hasn't rolled a tire in 20 years. I sort of get the impression that tubulars rolling is a very rare occurrence. Your procedure is so involved that if I had to go through all that, I wouldn't bother. I'd give it to the LBS to glue. But that's a huge pain because they're 40 miles from here.

It's rubber cement. I think getting some on the tire and the rim both is key to get the cement to adhere (that's how the rubber cement we used in commercial art 30 years ago always worked). I don't think tubulars are too prone to rolling without glue, with any kind of glue job the likelihood gets reduced to a pretty low level.

GeraldChan

I would never trust someone else to glue my tires since it's my skin which is at risk. Yes, I rolled a tire back in the early 80's, as I was a grad student who was out of practice.

I spread a thin amount of glue (using Saran wrap over my fingers) on both the pre-stretched tire and on the rim. Allow this to dry tacky (15-20 mins) then put a thin bead on the centerline of the rim and immediately mount the tire. I inflate to 35 psi and then carefully center the tire using a trueing stand.
Once I am happy with the trueness of the tire I inflate to 120psi and allow the bond to cure 24 hrs.

The higher the quality of the tire, the easier it is to center. I feel that truing the tire to the wheel makes for less rolling resistance but I have no data to prove this. Perhaps it's just my OCD nature.

I still wonder how the tubulars in the oft cited rolling resistance study were glued b/c I still find it hard to beleive that a properly glued sew-up, using a hard mastique can be worse than a clincher.

Busta Quad

Yet you trust someone else to lay up the CF in the rims, attach the spokes, etc.

ninja2

this is exactly how I used to do for years, last time around 91/92 (had a very long pause from active biking from then until 5 years ago). the question: is this worth the trouble? the price seems to be right, but are the advantages significant enough? reduced coef or rolling resistance? puncture resistivity and general durability?
would appreciate facts from BF folks who used both clinchers and tubies.

Thirstyman

How much glue in the "thin layers?"

I had been planning to use 2 30g tubes to do all rims and tires for but I see PBK sells Mastik 1 by the tub (very cheap) not the tube so dosing out the glue my be more tricky.

patentcad

Thanks for the tip, didn't center the tire, it's off a bit. I'll see if I can feel it when I ride, if so I'll do it over.

f4rrest

Now you're ready to do your own laminated countertops. Have fun.

Allegheny Jet

I mounted two tires on tubular rims yesterday and only used one tube of Continental Cement. I put two thin coats inside each of the rims and a thin coat on the tire casings. This was my fist tubular gluing in 30 years. As a true Baby Boomer, I'm restoring my first road bike back to riding condition no matter what the cost in time and dollars. I can't believe that I'm buying back parts that I gave away long ago as junk because I thought "I'll never have to deal with this again".

GeraldChan

I use both types of tires on my 3 steel bikes. Clinchers get 2-3X more flats than my tubulars for the equiv mileage. They are a harsher ride and don't corner nearly as well (you know, when you have the inside pedal up and your weight on the outside pedal and just carve that apex. The feeling of control is so much better on a tubular.)

However, when you fix the flat on the clincher it is done as opposed to my lazy behind mailing it to tirealert for him to fix it at $18/ tire (for the lighter tubes).

ninja2

thanks, that sounds just good enough to get good used tubular wheels and get them on - as pcad said, $75 a pair at PBK is an incentive by itself, plus what you mentioned..

Naterider

Boring thread that will go on for 3 pages because pcad is pcad. Mission accomplished.

patentcad

I found glueing the tubular to be the highlight of my pathetic week. This week will start out tomorrow with a blizzard and a root canal. But that's not all bad, it can only get better after a Monday like that.

Naterider

You made me laugh.