Time Trial / Time Trialling / TT

I'm building a fixed TT machine. Any thoughts on using miche cog+carrier arrangement. Less wear if changing cogs a lot? Mark
http://www.parker-international.co.uk/1823/Miche-Fixed-Sprocket.html

Seemed like a good idea, but the sprockets themselves are not that nice. As it turns out, I don't think sprocket changing is very frequent among people who TT on fixed. Course design means downhill bits are always balanced by uphill bits, and the same with headwind/tailwind. Consensus seems to be that you need one chainring and three sprockets 1 tooth apart, say 14/15/16. The 14 stays on your best rear wheel for fast days on fast courses, the 16 is for early season when it's a bit cold and you're going slowly and the 15 is for everything else, so once a year you change from the 16 to the 15 on your second best wheel, or put the 15 and 16 on the two sides if you have a double sided hub. Good quality hubs/sprockets are made for track league use, where you might change a sprocket every week through the season, so the number of sprocket changes imposed by a TT season, either one or none, is so far inside the design parameters that it's not even a consideration.

I'm building a fixed TT machine. Any thoughts on using miche cog+carrier arrangement.

Those things need to be driven out of existence TBH, I've seen far too many of them fail on the track. I imagine they are discouraged in TT circles too.

done. Just ordered my Andel and Dura-ace cogs! cheers.

Don't forget a lockring. I realise it may be common sense but I've seen people go from track racing to road TT's without thinking that they need a lockring

years ago, i built a fixed training bike. I'm sure i did the trick where you use a gear hub and use a BB lockring as a lockring for the cog. Anyone else done this.

Many have tried, all have failed. It's still a suicide hub even with a BB lock ring masquerading as the real thing.

I tried one of those once. Never again.

Seemed like a good idea, but the sprockets themselves are not that nice. As it turns out, I don't think sprocket changing is very frequent among people who TT on fixed. Course design means downhill bits are always balanced by uphill bits, and the same with headwind/tailwind. Consensus seems to be that you need one chainring and three sprockets 1 tooth apart, say 14/15/16. The 14 stays on your best rear wheel for fast days on fast courses, the 16 is for early season when it's a bit cold and you're going slowly and the 15 is for everything else, so once a year you change from the 16 to the 15 on your second best wheel, or put the 15 and 16 on the two sides if you have a double sided hub. Good quality hubs/sprockets are made for track league use, where you might change a sprocket every week through the season, so the number of sprocket changes imposed by a TT season, either one or none, is so far inside the design parameters that it's not even a consideration.

Many have tried, all have failed. It's still a suicide hub even with a BB lock ring masquerading as the real thing.

You should write a book, or website, or tablets of stone with all this stuff you know in. That's if you haven't already of course...!?

other than go really fast

https://www.lfgss.com/thread16289.html

pedal really fast.

Want a tip? utfs

its all about technique

1. Don't bother to get a special and expensive TT bike to start on - if you don't go fast it will only be an embarassment.
   The majority of TT riders are rarely in contention to win events, so most of the time they are aiming to improve their own times. In this context allowing yourself time to progress to the best equipment should give more scope for p.b.'s and so prolong your interest.
   
2. If possible, do some road racing. This should improve your speed, but more importantly may ward off the staleness and boredom which often come from riding too many time trials.
   
3. Andy W. is right - read the existing TT thread.
   

That thread is great, I called Hippy a "rotten-bottomed chipmunk fluffing blancmange burglar" in 2009

He still is.

lance armstrong/ cancellara style: high cadence.

lance armstrong/ cancellara style: high cadence.

Unless you happen to be Nik Bowdler (BBAR 2008/2009) who favours a 77 tooth chainring combined with an 11sprocket and 165mm cranks

This gave him an *average *speed over 50, 100 miles and 12 hours of 27.3 mph!

The Hounslow 100 again offers a £25 prize to the best rider on fixed gear.

The same condition applies as before: if there is only one rider on fixed, he (or she) must beat my modest 2006 time of 4.41.06. to be awarded the prize.

I hope to ride myself, and I doubt whether I am capable of going as fast as I did five years ago, so if there are only two of us your target should be a bit easier.

Entries to: T. Gilbert, 74 Churchfield House, Lushington Drive, Cobham, Surrey. KT11 2LX. Entry fee £10.
This is an open event, so you must fill in a CTT entry form and get it to the organiser by Tuesday 17th May* at the latest. *As I've said above, you don't need to worry if you can't fill in all the spaces, there will not be a full field.

I'm tempted to have a go just to make 50s seem shorter :-)

I'm tempted to have a go just to make 50s seem shorter :-)

Yes, I think this is a valid reason.

Riding a 12 to make 100's seem shorter doesn't really work since it will probably take the rest of the season (or possibly, your life) to recover.

Although I don't feel good for a couple of days after a 100 it doesn't take that long before there seems to be a beneficial effect. Even if it's only that the other distances *seem *shorter it's still worth having.

I would like to give 10m TT a go. Does anyone know a regular course close to / around South East London that I could turn up on a day and ride? Preferably midweek.

And when you get an answer, may I join you in TT exploits?

These 2 links might help:

London South District

South East District

@BMMF -Thanks.
Found this : https://spreadsheets.google.com/pub?key=psD27vgjyjemKqFoCKgwOXg on London South District.

@ 6pt - I am thinking G10/42 (Dorking) or G10/38 (Sevenoaks) both are run on Wednesdays. Most likely will do one next week.