Time Trial / Time Trialling / TT

a constant stimulus of carbohydrate in the mouth to produce the boost seen in mouth-rinse studies;

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If anyone's interested in studies, "Single and combined effects of beetroot juice and caffeine supplementation on cycling time trial performance." is worth a read.

so from that (single study) it would suggest yay to the caffeine and nay to the beetroot.

Word. Caffeine is great. Upto 250mg is proved useful, more not beneficial. And it peaks about 1h after ingestion. Chew them up in mouth, or smash up and put in a bidon to drink. But if you drink lots of coffee normally, the effect will be lessened.

Beetroot, is a real mixed bag still. A fair bit of negative or low benefit press. I'd not bother.

Asda were selling the cartons for £1 each last week, picked up a few. Kinda got used to the taste now.

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Everything blends.

If anyone's interested in studies, "Single and combined effects of beetroot juice and caffeine supplementation on cycling time trial performance." is worth a read.

You mean the study that the whole article I just linked to is about?

Oops, yes. Really should read what other people post.

Word. Caffeine is great. Upto 250mg is proved useful, more not beneficial. And it peaks about 1h after ingestion. Chew them up in mouth, or smash up and put in a bidon to drink. But if you drink lots of coffee normally, the effect will be lessened.

Beetroot, is a real mixed bag still. A fair bit of negative or low benefit press. I'd not bother.

You have old information.

For starters you're probably better off using 3-6mg/kg rather than an arbitrary 250mg - dose depends on your weight. Peak might be 1hr after but the half life is something like 6 hours so redosing is bad. Being a regular coffee drinker doesn't necessarily negate or reduce the effect - again it depends on how much you take and your own body's response to it.

There have been more recent studies but some general info can be found in: http://www.gssiweb.org/Article/sse-60-caffeine-and-exercise-performance

Thanks.

I normally recommend (and use) a flat 6mg/kg for everyone. For ease of use the cheap glucose/dextrose/caffeine pills you can get from Sainsbury's/Boots are fine, don't use Pro Plus as they have sorbitol coating and are way too expensive.

Caffeinated gum doesn't have enough in it to reach the 6mg/kg for most people so you have to have too much for it to be practical, unless you're doing a long event that needs a dripfeed (long TT, RR, Audax etc.) or an intermittent exercise event like a track omnium or sprint tournament

Xav

New Hed 3

http://www.slowtwitch.com/Products/Things_that_Roll/Race_Wheels/Hed_revises_iconic_H3_4242.html

Shallower... the Hoxton Massive will not be happy.

Slower on float days and shit days :-)

That's a huge benefit at 10°-12° though, plus the gain from using a wider tyre. The sharp rise in drag at 15° suggests a stall, which usually means a wheel becomes a bit of a handful, so it seems that the docile 'all conditions' H3 has been joined by a super fast 'light winds only' GT3, not usurped.

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It's stilly really isn't it - all they've done is make a trispoke version of the Stinger 7 with the same stall angles etc. I doubt it would be easier to handle than a Stinger too. No wheel/tyre combo I've ever tested at typical yaws has beaten out my H3 with a narrow VF Record and treated bearings, but you can't find the old VF Records now so a clincher is a better bet.

Xav

Old VF? Which are the old?

The 20mm versions, all the new tubulars with the big Veloflex logo are 22mm. Clinchers still 20mm but there are better 20mm tyres for a clincher trispoke like GP Supersonics

Xav

I think there's not much to choose between VF Record and GP Supersonic as tyres, are you saying the Conti is measurably better when combined with the H3 as a system?

Oh. Planet x have 20s.
Or they say they have 20s.

I bought a Planet X "20" but they just copied and pasted the text on their website, all they have are 22s and it's going back to them tomorrow :(

The Conti supersonic should be better overall (ie. Crr and drag) than a VF Record clincher, the VF tubs are ever so slightly different (and you can silicon seal the edges too). The old Bontrager Aerowing 19mm TT clinchers were sweet (and bombproof) but a bit of a lottery as to whether you'd get a low Crr or high Crr one

Xav

AHH.

I'll treasure the pretty much new one on my Tri-spoke then.

Have you tried FMB? As they is not really test data out there for them. But silk and latex.

Vittoria?

Open Dry Road TT, or Open Corsa Evo CX.

I used a Evo CX 20c on mine for most of last year, going to keep it on for more sporting/club events and use a Supersonic for fast courses.

I was planning on getting a 20 to use on the front, I've got some 23 left to use on the rear.

Being as I'll be riding to most races, the Supersonic looks a bit too thin and I'll happily trade some performance, for protection.