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Tubular rider questions....glue?(8 posts)

Tubular rider questions....glue?ekdave
Sep 6, 2002 5:50 AM
Im thinking about tubular wheels/tires. I guess it just freaks me out to see a tire held in place by some glue. Is the glue all that really holds the tire on? Or is it the air pressure pushing down on the rim all around?

Seriously, how often do you see or hear of people having tubulars roll off the rim?

they've been around since the stone age, so there must be a good knowledge base out there....

I guess talk me into it, or talk me out of it. I would use these for racing only. Not many crits, mostly road racing and some non-technical circuit races.

re: Tubular rider questions....glue?str8dum1
Sep 6, 2002 11:10 AM
The pressure hold the tub on pretty tight. i mean you can ride one without glue as long as you dont make any quick/ hard turns.

people only really roll tubs when they clip a pedal. that usually causes the wheel to skip and alot of side force which pops the glue. but even then thats rare if you took your time to glue on the tub.

they are the best for crit in that you dont pinch flat and if you do flat its a much more controlable release of air as you dont have to worry about the clincher coming of the rim.

for me, there is no way i'd race clinchers again.
re: Tubular rider questions....glue?Akirasho
Sep 6, 2002 11:52 AM
... to add a bit... the glue is a form of contact cement and is very tenacious... when you consider that all that's holding a clincher on is a wire or aramid fiber band and the hook of the rim (along with air pressure pressing out on the casing)... a tubular starts to sound downright inseperable from it's rim!

Personally, I use Vittoria Mastik One exclusively (I don't mix glues) and have had great success.

They're not for everyone, or for every situation... but if needs warrant (the abovementioned race (I use mine for time trials and a "few" training rides) they are a viable option.

We abide.

Remain In Light.
And just what do you expect to gain?Kerry
Sep 6, 2002 4:31 PM
currently 1/3 to 1/4 of the Euro pro peleton races on clinchers. The fraction is probably higher in the US. This alone should tell you that any performance benefits from tubulars are minimal. The fact that you are asking these questions says that you are new to racing. You have a lot of other things to worry about besides the mostly illusory benefits of switching to tubulars. DON'T DO IT.
And just what do you expect to gain?letsGoOn2
Sep 6, 2002 5:23 PM
You can expect to loose in the neighborhood of a pound off your wheels, depending on the rims you decide to get. Carbon rims benefit most from being tubular because they don't need an aluminum sidewall for tire retention That's a lot of rotating weight!

Of course it's less than the weight that will be removed from your body if you aren't meticulous about gluing the tires on... Lots of info at this link, which was posted recently in a different thread -
Preposterous claims!Kerry
Sep 8, 2002 3:06 PM
Let's see, a typical clincher rim (Velocity Aerohead) weighs about 415 grams. Saving a pound of your wheels means 225 grams per wheel, which means you have found rims (with equal stiffness and durability, no doubt) that weigh 190 grams each. Very impressive! However, not physcially possible. Also, note that rotating weight is more important than other weight ONLY when you are accelerating and then braking. Otherwise, all the additional energy you put into spinning up the wheel is given back when you coast. And, as an interesting aside, all that extra energy is actually a very small number.
Preposterous claims!letsGoOn2
Sep 9, 2002 10:25 AM
Not proposterous when you consider the tires too. A 280 gram carbon tubular rim will be at least as stiff as a 415 gram AL clincher. There's (415-280)*2 = 270 grams. Now let's look at tires. A 210 gram tubular requires no tube or rim strip. With clinchers you need a 220 gram tire to even come close to the reliability of the tubular, plus you need a 70 gram tube and rim strip at let's say 10 grams. There's ((220+70+10)-210)*2 = 180 grams saved with tubular tires. 270 gram savings on the rims plus 180 grams on the tires gives you 450 grams.
re: Tubular rider questions....glue?mackgoo
Sep 6, 2002 10:29 PM
What ever you do stay away from Tubasti, the white stringy Elmers glue lookin stuff. It will give you the fits.