Bike Forums

Bike Forums (https://www.bikeforums.net/forum.php)
-   Classic & Vintage (https://www.bikeforums.net/forumdisplay.php?f=181)
-   -   Totally Tubular (https://www.bikeforums.net/showthread.php?t=154679)

pastorbobnlnh 08-26-20 06:50 PM

Quite the day WGB !!! I do hope you have a speedy recuperation with no ill effects.

L134 08-26-20 06:59 PM


Originally Posted by 79pmooney (Post 21662345)
My body has seen so many that I'll happily patch 50 tires to save myself one more crash.

Ben

Then why not ditch the clincher rims now rather than wait until they wear out? How many more miles do you have to risk another crash before you wear out those rims?

Classtime 08-27-20 07:07 AM

WGB fold or pinch the tire on either side of the valve and put some air in the tire to find the leak. Keep moving the fold/pinch till you find the problem. i HATE seams in the road.

WGB 08-27-20 09:44 AM

[MENTION=397345]Classtime[/MENTION] I found the leak. On either side of the valve. Probably tore tube when the wheel twisted but the valve stayed still in the hole.

I'm seeing bertinjim to see if he can magically repair it. Got a quote from Tire Alert for $30 to repair. If we can't fix it here I'll hold until the border re-opens and mail it there. In the meantime I'll have to bite the bullet and order new. Hoping someone will post Tubulars on the sale page but that never happens when we need something.

pastorbobnlnh Thank you for the kind words. I suspect it's more of a case of humiliation (and inability to ride for a few days) than serious injury, and also a reminder that I am 57 not 27.

tcpasley 08-28-20 08:42 PM

Rim weight question
 
I’m thinking of building a tubular wheel set for my freehub bikes, and I have a line on some “modern” (i.e. 1990 and newer) somewhat stout and aero Mavic CXP rims that weigh ~525 grams. Since I weigh in around 230# these days, the stoutness appeals to me, but I wonder if I would be giving up on the “magic carpet ride” qualities of the older, lighter rims (Ambrosio Montreals, Mavic GL330s). I also am looking at some Velocity Escapes which may be more like the rims from the golden age of tubs.

Any thoughts on the matter? Am I overthinking the the matter of rim weight?

pastorbobnlnh 08-29-20 06:30 AM


Originally Posted by tcpasley (Post 21666812)
I’m thinking of building a tubular wheel set for my freehub bikes, and I have a line on some “modern” (i.e. 1990 and newer) somewhat stout and aero Mavic CXP rims that weigh ~525 grams. Since I weigh in around 230# these days, the stoutness appeals to me, but I wonder if I would be giving up on the “magic carpet ride” qualities of the older, lighter rims (Ambrosio Montreals, Mavic GL330s). I also am looking at some Velocity Escapes which may be more like the rims from the golden age of tubs.

Any thoughts on the matter? Am I overthinking the the matter of rim weight?

I don't know how rim weight effects the ride qualities of tubular tires, so I can't speak to that part of your question.

However, I'm a big guy, while currently a reasonable 210 for my 6' 1" height, I've weighed at times as much as 300+. The bike with tubulars I ride the most is my '71 Schwinn Paramount P13 which runs Fiamme Ergal red label tubular rims on HiE hubs. Fiamme are known as lightweight rims (not certain of the weight) which can be a bit touchy about keeping true. In my experience, I've not had any trouble with these rims going out of true and the roads here in the NH mountains are notoriously rough (plus I ride a good bit of dirt and gravel roads). Of course YMMV.

IMO you are safe to use lighter rims as long as the wheels are built and tensioned correctly. I'd err on the side of the more spokes and crosses of the spokes the better, in order to achieve a very sturdy and durable wheel. Best of luck on your decision.

Wileyone 08-29-20 08:05 AM


Originally Posted by WGB (Post 21662530)
obrentharris seedsbelize gaucho777

Thank you all.

I ignored good advise to get checked out at Emerg and went home where I posted then promptly fell asleep. Got up and now can hardly walk. Headaches gone so assume it was just shock.

First should say I'm touched by how people will stop to help complete strangers. Lady gave me (a complete stranger) a ride of about 20 miles (would have to get the bike later) then another person is bringing the bike to my house! Does make you feel at least hopeful about people.

Obrentharris advised to send to Tire Alert. I'd never even heard of them so good to know. I emailed asking for a quote. The valve is loose enough in the tube to turn part way, each way. I used a CO2 pump on the side of the road and filled the tire and could see gas coming back out so assumed it was a bad valve. At home I tried the floor pump and tire kept going flat. This was while still mounted. I put that tire in water and pumped. Air rapidly exiting the tire at the base of the valve. While tire in rim it was exiting slower, probably due to compression.

Gaucho777 suggested repairing and if quote too high might go that route

Problem is that in Canada tires, especially Tubular tires, are very expensive and if I buy the three for $50 deal from Yellow Jersey shipping is another $35 so for that money I might as well buy quality which means $100+ a tire. Might post on the for sale thread and see if someone has some they no longer want. Not to mention a new helmet and a new Brooks. #%(@#$!!!!!!!

Buy from the UK sites (except wiggle). Shipping is free over $100. Just make sure they ship via post and chances are you may avoid customs fees.

SurferRosa 08-31-20 03:25 PM

Hey tubular lovers! A set of tubed clinchers just won its first TDF stage. :thumb:

squirtdad 08-31-20 04:15 PM


Originally Posted by SurferRosa (Post 21670931)
Hey tubular lovers! A set of tubed clinchers just won its first TDF stage. :thumb:

begone satan

what were they?

SurferRosa 08-31-20 04:27 PM


Originally Posted by squirtdad (Post 21671027)
what were they?

Specialized Turbo Cotton (I think).

Classtime 09-01-20 12:11 PM

tcpasley GL330s are pretty light. I'm at 160 lb and I wrecked a pair in a couple of pot holes. I still have a pair on one of my regular riders and they have been fun but when they are banged up, I won't be looking to replace them with same. (I write this now but light wheels are a kick and who knows.) If I were you, I'd get a pair of Ambrosio Nemesis which are still available. I have Nemesis on one bike and have ridden them on multiple very rough events and they are like new. Mavic Tubular Open Pros are still around but we don't know what the future of Mavic will be. I don't think Velocity is making the Escapes anymore so replacement rims will be hard to come by and you may as well find a pair of GP4s which I have also ridden on the rough stuff and they are "bullet proof". In sum: Go new and go Ambrosio.

JJScaliger 09-01-20 03:15 PM


Hey tubular lovers! A set of tubed clinchers just won its first TDF stage
Yuck

dimethi 09-02-20 02:41 PM

Crossposting from the Mechanics sub so I'll try to keep from rambling: I was thinking of gluing on a pair of new (but older) Vittoria Pave tires that I haven't used for a few years.

Wanted to ask for opinions on whether they looked safe to ride on; the tread is free of cracks, but some stitching is exposed on the sidewalls--I took a couple pictures of the worst spots.
Any input would be appreciated, thanks!

Picture 1
Picture 2

Classtime 09-02-20 04:14 PM


Originally Posted by dimethi (Post 21674677)
Crossposting from the Mechanics sub so I'll try to keep from rambling: I was thinking of gluing on a pair of new (but older) Vittoria Pave tires that I haven't used for a few years.

Wanted to ask for opinions on whether they looked safe to ride on; the tread is free of cracks, but some stitching is exposed on the sidewalls--I took a couple pictures of the worst spots.
Any input would be appreciated, thanks!

Picture 1
Picture 2

If they also look like that after you have 90 lbs or so in them, then yea, ride them. However, for me, they would conjure some anxiety while doing any high speed turns. I'd probably not use them on spirited group rides because my problem would be everyones problem.

gaucho777 09-02-20 08:37 PM

dimethi My suggestion is to brush on a flexible water-resistant sealant such as Barge Cement which I use on my wide cyclocross tubulars to help protect the sidewalls.

79pmooney 09-02-20 09:35 PM

Open Pros have a synthetic casing. Pretty durable. I haven't used the tubulars but have ridden many of the clinchers until they were old, tired, flat attracters. Small casing issues aren't going to get you in trouble. Watch for a bulge. When you see that, either retire it or boot the casing. (The casing runs on both diagonals. The bulge means what one layer is shot and just the other is working. It will get you home fine.)

Those are good, reliable, dependable tires except - they love to pick up glass and sharp debris. Great n the wet but the wet accentuates the pickup. Down wet mountain roads I've never seen before with unknown pavement they are my first choice. One some roads closer to cities, my last choice.

I'd take 10:1 you never see that bulge riding it until it dies of other causes.

Edit: weeks later - I said Open Pro, Meant Pave as Diable Scott was quick to point out. (Open - clincher. I knew that! Pave; the great green rain tread, I knew that also.)

Ben

DiabloScott 09-03-20 01:39 PM

Them're the REALLY old Pave's.
https://i.imgur.com/XQ9J7xr.jpg

The casing looks fine, the problem is that the protective layer over the casing is gone, so the casing will decompose earlier than expected.
I wouldn't hesitate to ride that tire but I'd keep a close eye on the exposed threads for fraying.

smontanaro 09-03-20 03:22 PM


Originally Posted by dimethi (Post 21674677)
Wanted to ask for opinions on whether they looked safe to ride on; the tread is free of cracks, but some stitching is exposed on the sidewalls--I took a couple pictures of the worst spots.
Any input would be appreciated, thanks!

Picture 1
Picture 2

Kelly's Cork Renew has been recommended to me and seems to work (I have a bottle which I've used on a few tires).

due ruote 09-03-20 03:30 PM


Originally Posted by smontanaro (Post 21676625)
Kelly's Cork Renew has been recommended to me and seems to work (I have a bottle which I've used on a few tires).

Interesting. I wonder what it’s made of. The other recommendation I have heard is liquid latex.

WGB 09-06-20 06:23 PM

I removed an older tubular to add more glue. Base cloth strip was torn and came off. So, without considering it should be replaced I tossed the old cloth strip and glued tire directly to the rim. Tire is very tight.
Should I,
- Strip tire back off and glue on a replacement strip?

Ride it???

DiabloScott 09-06-20 06:48 PM


Originally Posted by WGB (Post 21681247)
I removed an older tubular to add more glue. Base cloth strip was torn and came off. So, without considering it should be replaced I tossed the old cloth strip and glued tire directly to the rim. Tire is very tight.
Should I,
- Strip tire back off and glue on a replacement strip?

Ride ir??

The base tape protects the casing and the stitching from sharp bits on the rim like the spoke holes. The tire is probably glued on just fine if you say so, but it'll be at risk of getting damaged and possibly a blow out.

WGB 09-06-20 07:25 PM

Guessing I'll need a new cloth base strip. Assuming I can just get a strip of cotton the width of the tire and cut to fit??

smontanaro 09-07-20 09:00 AM


Originally Posted by WGB (Post 21681356)
Guessing I'll need a new cloth base strip. Assuming I can just get a strip of cotton the width of the tire and cut to fit??

I think you might want to look for bias tape of appropriate width and weight at a fabric store.

Classtime 09-07-20 07:06 PM

I just tossed another Vitoria Rally. A while back, I got a deal on 3 25mm Rally. Bad luck, random chance, whatever--no more Rally tires for me. I was a Sprinter GS/ Competition user and then I spent my birthday $ on a pair of Vittoria Corsa Tubulars and was happy enough that I got some Rally for my vintage ride. Puncture city. On the Corsas and the Rally. I did enjoy the ease of mounting the Vittorias but I just ordered a pair of regular Sprinters and the third Rally that Stans has fixed for now will be my spare.

woodcraft 09-11-20 11:02 AM


Originally Posted by Classtime (Post 21682930)
I just tossed another Vitoria Rally. A while back, I got a deal on 3 25mm Rally. Bad luck, random chance, whatever--no more Rally tires for me. I was a Sprinter GS/ Competition user and then I spent my birthday $ on a pair of Vittoria Corsa Tubulars and was happy enough that I got some Rally for my vintage ride. Puncture city. On the Corsas and the Rally. I did enjoy the ease of mounting the Vittorias but I just ordered a pair of regular Sprinters and the third Rally that Stans has fixed for now will be my spare.


My experience as well- not worth bothering with.

ThermionicScott 09-14-20 03:30 PM


Originally Posted by smontanaro (Post 21653220)
I'm not sure the front/rear differential is enough to cause problems, and most braking isn't of the panic stop variety. Seems to me that the softer "suspension" makes for more comfortable riding, especially over long distances.

Jan Heine is someone I think of as a tire pressure expert. In this post about braking, he said nothing about changing the way he approached tire pressures, so I presume he didn't deviate from his usual recommendations.

I'm a little late to reply on this one, but JH has since clarified/walked-back past support for front tire pressures that were much lower than the rear: https://www.renehersecycles.com/myth...gher-pressure/

It's been about 10 years since I went down the Berto "15% drop" rabbit hole, but pretty early on I decided that 45/55 was about as unbalanced as a road bike ought to be, especially if carrying a front load. Whenever possible, I discourage people from using the 40/60 option that is present on some tire pressure calculators.

And now back to your regularly scheduled programming... :)

seedsbelize 09-14-20 05:19 PM

My wife arrived home from the north country, last evening. Bearing two Servicio Corse and one Challenge Elite, plus three record hubs. I have the rims and will begin spoke calculations shortly. Can tubulars simply live stretched over rims or is there a shelf life for that type of storage?

smontanaro 09-14-20 05:45 PM


Originally Posted by ThermionicScott (Post 21694148)
I'm a little late to reply on this one, but JH has since clarified/walked-back past support for front tire pressures that were much lower than the rear: https://www.renehersecycles.com/myth...gher-pressure/

Thanks for the ThermionicScott .

JohnDThompson 09-14-20 08:10 PM


Originally Posted by seedsbelize (Post 21694323)
Can tubulars simply live stretched over rims or is there a shelf life for that type of storage?

My experience is that if they are stored away from UV light, ozone, excess moisture, etc. they can last at least a couple decades stretched on a rim.

fawudd 09-15-20 07:44 AM

I recently retrieved my old Vitus 979 with Vittoria sewups that had been sitting indoors away from UV for about 20 years. Amazingly, the tires look good, hold air well, and felt fine on a ride around the block. Then they went for a 10 mile ride while I waited for new tires to arrive, then another, then a 15 mile ride. These are flat rides with no high speeds. Even though the new tires arrived, I have repeatedly delayed making the change because it is not my main bike, and it rides as well as ever. 2 questions :

1. How risky do you think it is to keep using the tires for 10-15 mile flat rides at low speed ?
2. Once the tires are changed, and assuming they come off the rim in one piece, would you keep one of the existing tires as a spare?

Thanks


All times are GMT -6. The time now is 04:19 AM.


Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.