Tubs

Ah, you beat my edit.

Helps if you dont use dark coloured brake pads.
Pad juice from wet rides cause a lot of the discolouration of skin walls.

I use these: http://www.wiggle.co.uk/lifeline-performance-carbon-road-brake-inserts-pack-of-4/

If I am going to pre-load the tubs with sealant AND carry pitstop do I need to carry a spare?

Dunno. Depends on your likelyhood of, and ability to deal with, getting utterly stranded should you get a really nasty flat.

hmm I know what you mean .. effeto mariposa claims that you could use a spare un-glued tub on the same tape by taking the punctured tub out; not sure if it will work in real world or not.

When is the Vittoria graphene stuff coming out?

In my experience if you run tubs with delicate sidewalls. You are at greater risk of suffering from a unrepairable hole.

I've never had a tread puncture that a can of latex couldn't fix.

Vittoria magic mastik .. thoughts?
My only concern is that they sit between a tape and proper glue .. will I be able to carry pre stretched pre glued tub with these?

Mixing mastik. Assume this is instant death?

Why. It is pretty much old school team mechanic standard to mix cements. People have been doing it for many decades... These days the mix is different.. typically a contract adhesive alongside the road mastik.

I have the possibility to buy some Assos tubular rims and been doing some research but how true is what this person is saying -

"Leeh,

Your 20mm rim width is probably about right for a 22-23mm or larger tub. Remember that the rim doesn't go 180 degrees around the tyre. Because they don't have the hooked flanges of a tyre rim, the tub rim actually covers less of the tyre section than a conventional rim.

With tubs, the rim width has less effect than normal tyre/inners, where the rim width affects the shape and cross section that the tyre/tube forms. Even the 2.2"/56mm mountainbike tubs around now are fitted to only 25mm wide rims.

With tubs, the most important measurement is the diameter of curve of the tyre seat. You should find that a circle approximately the size of your tub cross section ie 22mm should sit nicely on the curve of the rim tyre seat without any gaps, allowing for the thickness of any adhesive. Try a mountainbike handlebar, 1" quill stem, wedding ring, or 7/8" 22.2mm copper pipe. Alternatively, pump up the tub a little and offer it up to the rim section to check. Don't worry about the pressure turning it inside out. It can take full pressure even off the rim.

If the tub is too small for the rim, there wil be gaps at the sides. This stops the glue/tape working at the sides, and the tub can roll. The tubs will also be far harder to get sat straight. Fit the tub on the rim without adhesive and see what it looks like, a sheet of paper should be a nice tight fit in the gaps around the sides.

Less serious is a big tub on a small rim, where the centreline of the tub isn't in contact with the rim, but there's still not really enough adhesive in contact to be safe.

This is why, even though those Assos rims were really narrow at 16mm wide, the curve of the tyre seat was still shaped to take up to a 22mm tub.

I hope that helps....All the best"

That's pretty much correct from what I understood when I asked the question a while back.

But if you're buying Assos rims you should really be putting 18mm tubs on.

I have the possibility to buy some Assos tubular rims and been doing some research but how true is what this person is saying -

More or less correct.. The point of the Assos rims were to try to get an aero advantage in concert with the super-narrow 18mm tubulars. They were "aero" rims in a day when aero was, to put it lightly, "less scientific" . The Assos rims are 17mm are really ideal for these narrow tyres. The fashion came and went.

Hey, I was looking for some advice if you can help. I'm currently riding on some Mavic GP4s to and from work each day (not far, 6 miles round trip) while I sort out putting together another bike (with clinchers). Although I do use for longer rides on weekend.

I realise riding on tubs for London commuting isn't ideal, but it's my only option right now. A couple questions, there are some Conti Giro's 22mm (punctured) on at the moment. Will the rim take a wider tyre (25mm)? What is a good option to replace with that has good puncture resistance?

Sorry if these have been answered previously in thread, didn't look too deep.

emphasized text

Sprinter Gatorskin

^ this

Thanks for the replies.

Also thinking of replacing them for clinchers. Am I right that the Mavic G40 is the clincher version ? Are there any other recommendations for swapping over? Thanks again.

Has anyone had any experience using Tufo Extreme sealant? If so, what did you think?

. A couple questions, there are some Conti Giro's 22mm (punctured) on at the moment.

The Giros are a waste of money. Poor ride, handing and reliability. A friend once gave me a case of them and ... well they did not last long. One of the most flat prone tyres I've used. It could not have been a one off as I had a case. For cheap robust tyres get some Conti Sprinters.

Also thinking of replacing them for clinchers.

Just get some good tyres. Clinchers are not more reliable.

Yeah, that's what I'm gathering from what others have said as well. They came with the bike which I have only had two weeks, but do look like they have been on there a while. I'm guessing they were used mainly because they were gumwall.

I guess I'm just more comfortable with changing clinchers as I haven't used tubulars before. But could be time to learn I guess. You have any recommendations for good gumwalled tubulars? Cheers

Any gumwall you mount now is going to get knackered by the weather - if you're going to be riding it now, that is.

I'd go with the Sprinter Gator for winter riding then mount some Corsa SC's or similar in Spring.

Because all clinchers are the same?
There are many more options among the clinchers on the market compared to tubs for reliability.
name one tub that comes close to a marathon plus for example.

Thought people on here might be interested in the last pair of Conti Tempo II on ebay for 55 quid, bargain as they retail for more than that for a single.

The gatorskins feel good but wear pretty quick, they feel softer than most other tubs I have and seem to like to keep glass etc. embedded in the rubber. I would keep my eyes open for whatever turns up on ebay for sale, unused pairs tend to go for relatively cheap.

Tufo extreme sealant has worked well for me, got scammed on here for 2 punctured gatorskins and filled them with the sealant, both still holding air perfect. The only negative is it will dry up after a while once you open it, but maybe just shake it up every now and then.

I find the gators work well with sealant - my theory is that their puncture layer holds the tube together meaning that the sealant has to deal with small punctures rather than gashes (which sealant doesn't do well with).

I've put thousands of London commuting miles on Gators+sealant, sometimes got to work to see the little white star of sealant but never realised when it happened.

No one needs marathon plus in their life.