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Rolling tub in 1989 TDF question(10 posts)

Rolling tub in 1989 TDF questionWoof the dog
Dec 20, 2001 9:30 PM
Hey, got a hold of 1989 TDF tape, in one of the last stage, there is a guy who broke away to win the stage, but one of the last few turns he rolled his rear tubular and was all over the pavement. Now, why did that happen? it looked as if he wasn't making that turn. I can't believe that's a pro on the pavement for rolling a tub, I thought their tubulars get glued on "professionally." Explain that one!

Thanx.

Woof.
speaking of which...Woof the dog
Dec 20, 2001 9:50 PM
will be riding a tubie front for spring racin'. Deathly afraid of rolling a tub 'cause you know what that means: an instant smackdown, literally...especially in the turn. Will do all the gluing by the book and with some shop guy's help. Just how likely are tubie roll-offs?

Thank you

Woof, finally going tubular dog.
re: Rolling tub in 1989 TDF questionrc28
Dec 21, 2001 5:49 AM
I believe that was PDM's Rudy Dhaenens (sp?) ...slid out while making a left hand turn. I've seen many instances where pros roll tubies...sometimes happened during mountain stages after the heat generated from braking on the descents softened the glue a bit.You don't see it as often now because a lot of them are riding clinchers now.But there was always somebody who did...I haven't seen one recently though.

Rick
Happened to a Spanish rider in the Vuelta this year...Cima Coppi
Dec 21, 2001 6:35 AM
Just like it was stated above, excessive breaking generates heat on the rim and sofens the rim cement. Also, if a tubular goes flat, it can roll off the rim very easily. In the case of the PDM rider in the '89 TdF, he may have flatted (a slow leak), and the lack of tire pressure could not keep the tire on the rim

CC
I think I remember that one...biknben
Dec 21, 2001 7:02 AM
I remember seeing tour coverage of a rider rolling his front tuby while going around a rotary (traffic circle). He was in a small pack of 3 or so just off the front nearing the end of a stage. Went around the left side of a rotary and when turning back to the right his tuby rolled and he went down and slid into a curb. The view from was a helicoptor so I didn't get see all the details.

I've seen one instance, in person, where a front tire rolled. I was a spectator at a race finish where a guy sprinting to the line went down after his tire rolled. To be honest it happened so fast I have no idea what caused it. He could have been bumped and was going down anyway.

There are a few circumstances that will add to the probability of a roll-off. Bad install and wrong tire pressure seem to be the obvious ones.

I would suspect that roll offs are a result of many factors. You're unlikely to roll one just going around a corner. But if you happen to get a flat or slow leak and not notice it right away, then go around a corner...that might do it. Possibly, If you just slap the tire on there with glue and go for a ride right away. Maybe if you heat the glue up on a descent and then start conering hard. I've heard of instances where you clip a pedal around a turn and the rear rolls off.

I ride tubulars. I train and occasionally race on a pair of Zipp wheels. I'm confident that they aren't going to just roll off. If they do, it will most likely be just one of many factors that would have resulted in a crash anyway.

Do you homework about glueing them properly. Everyone has their own opinion on what "Proper" is. Do a search on this forum, ask a few guys who have them. Take a conservative approach, be smart, and you shouldn't have to worry about it.
Rudy RIPDorant
Dec 21, 2001 8:43 AM
This was Sean Kelly's and Martin Early's team mate Rudy Dhaenens world Champion that year, great rider and character too. He was killed in a car crash in Belgium about a year ago or so, RIP

His tub rolled because of a couple of things, one the temperature was fairly hot and made the glue a little warm and he had a slow puncture too. So Kelly has said anyway.

By the way Tubs are still used by about 99% of the Pros for tons of reasons.
Rudy RIPrc28
Dec 21, 2001 10:09 AM
Don't you think 99% is a wee bit too high? I know at least Cofidis,AG2R ,Saturn and a bunch of others are riding clinchers (Michelins). Also, I recall reading (either in VN,CS or Procycling) that most of the domestiques in the pro peloton ride mid-level clinchers because sometimes the sponsorship is so small that they reserve the good tires for either their top riders or for very important races only.99%? No way.I would say more like 60% (if that).

Rick
Mr. LuckyJack S
Dec 21, 2001 10:52 AM
Dhaenens also flatted while on a break going into Roubaix... '89 I think, same year Bauer got pipped at the line.
Actual numbersKerry Irons
Dec 21, 2001 6:01 PM
About 60-70% of pros are still on tubulars, not 99%. Unless of course you subscribe to the "correct within an order of magnitude" school of statistics, then your number is actually right.
Aight thenWoof the dog
Dec 21, 2001 6:12 PM
first of all, thank you all for the replies. So, whats the proper way to glue on tubulars? Any small quirks I may not hear about? I have Zinn's book and my trusty LBS guy who will probably do it for me the first time.

I am also going to purchase some tubular tires: conti sprinters. Since its only a custom front tubular wheel (no money for the rear one) I think I will just buy a pair of these tires and they should last me for a while. right?

Yes, I will stay away from the white stuff and get the brown (conti?) glue.

thanx.

woof.