Time Trial / Time Trialling / TT

Full set of PBs this year.

Finally won a Type B event.

Faster than you, princess. :P

I'm impressed, must try harder.

Faster than you, princess. :P

I'm sure you will be soon, but as my PBs are 21:29 and 54:31 you aren't yet.

Considering my season goals were 'beat club record in 24hr' and 'place top 5 in 24hr' and I far exceeded those as well as PBing every other distance without actually training for them (save the 12hr) I'm pretty happy with this season. If I gave a crap about 25s and 10s then I'm sure I could go faster, especially if I wasn't using the same position as I did for the 24hr and entered some of the 'cheat' courses. How was your 100 this year? Your 12hr? BBAR place? 24hr? Oh..

Let me know which courses your PBs set on and I'll make a note for next year.. cheeky fucker.

Let me know which courses your PBs set on

H10/11 and H25/13, both on the A34 which isn't used any more, but you'll get the 10 easily on either H10/181 or F11/10. The 25 you can probably beat on the H25/8 if you just do some more specific work aimed at short distances and get a halfway reasonable day.

PB by 2.5 minutes

Impressive stuff there. Kudos.

Congratulations. Especially given a none-too-shabby 25 on the H25/8 on Saturday afternoon.

What kind of difference would you expect to see in riding a TT bike V's a road bike, over 10-25-50 distance? Assumptions made.

My course PB's on the sporting course we used for our weekly club events when I raced (Q10/22 Harrietsham):

TT bike, disc, deep section front, aero lid, skin suits etc: 21:43
Road bike with zero aero aids: 23:16

Ridden it a fair bit so know the course very well which helps, but I reckon it's about right to answer your question for a 10.

25:30 this morning on Polhill Q10/18 http://app.strava.com/activities/22200702
I have done a 24:20 on 97" fixed on that course before :(

Skinny would have beaten me easily but had a blow out on the sharp left corner, nice version of the Japanese flag on his rear to show for it, you want something similar to this James [ame="http://www.amazon.co.uk/Jelonet-10cm-Pack-10-Dressing/dp/B002R6E5V0/ref=sr_1_2?s=drugstore&ie=UTF8&qid=1347840706&sr=1-2"]Burn dressings[/ame]

What kind of difference would you expect to see in riding a TT bike V's a road bike, over 10-25-50 distance?

Depends how long the piece of string is.

From my own rides at the tail end of the 2011 season on the Shurlock Row course, 24:32 on the TT bike and 27:01 on the track bike under 'old school' rules, so no deep wheels or tribars and also road jersey instead of skinsuit. I may have been a bit undergeared on the track bike. With a skinsuit on, I did 25:04 on the H10/2 on the track bike, against 23:43 on the previous outing on that course on the TT bike. As well as all the aero differences, those track bike rides were done on Vittoria Diamante/butyl tubes, which are a bit agricultural compared with the Vittoria UltraSpeed/latex tubes which were on my TT wheels at the time.

10 mile comp record has only come down by 51s from 18:48 by Colin Sturgess on a road bike to 17:57 by Dr. Hutch, who has probably spent as much time in the tunnel as any pro refining his equipment selection (including socks) and position.

If your road bike as a Cervelo S5 with Zipp 404FCs and your shoulders don't move between riding on the hoods on the road bike and being on the tribars of the TT bike, the gain could be much smaller than any of the above examples. OTOH, if you move from a fat tubed aluminium air brake with Mavic R-Sys onto one of the UCI-illegal tri bikes and gain acres of CdA from a change of position while you're at it, you might see a speed gain even bigger than the 10% illustration above.

H10/11 and H25/13, both on the A34 which isn't used any more, but you'll get the 10 easily on either H10/181 or F11/10. The 25 you can probably beat on the H25/8 if you just do some more specific work aimed at short distances and get a halfway reasonable day.

It has to be said you're very helpful even when you're laughing at me. :)

Thanks FWN. It's healing up good. WIll get some of that, had a trip to the chemist yesterday and got some similar bits.

So it sounds like there is a bit in it. Just more out of interest, happy to ride against myself and my times on a road bike for now, but wanted to know what kind of difference you'd see from going between the two. So thanks for the insight all.
Oh another bike to own, more money to spend. It's never ending.

http://www.guardian.co.uk/sport/2012/sep/17/ray-booty

http://www.guardian.co.uk/sport/2012/sep/17/ray-booty

Brilliant :) so I only need to lose half a stone and ride 84" gear :)

How do handicaps work?

Some you are born with, others can be caused by accidents or disease..

Serious: I have no idea.

How do handicaps work?

They get their benefits stopped by ATOS maladministration, and then they have to. That's the government's theory, anyway.

GN02 gives the CTT view.

Would a slightly slack HT angle matter that much on a TT bike?

As long as the fork offset gives appropriate trail, any head tube angle between 65° and 80° will work fine. How slack are we talking? There's a 53mm offset Cervelo FK26SL/UL to quicken up the steering if you have a 70° HT and find it a tad sluggish. 3T Funda is available in 43, 49 and 53 to tune your steering.

It'll be 70° if road forks are a standard (ish) length

I'm thinking of using an old mtb for my brother. It needs new dropouts which I can sort out easy enough so if I need to then I can raise the BB height to steepen the HT. There's not many corners on the TT courses around us but I don't want something that's going to flop at the slightest rotation.

700c road forks will be shorter than even 'uncorrected' 26" rigid MTB forks, so your head angle might not be as slack as you think.

I'm going to use road forks as it had a 1,1/8 threaded rigid mtb fork.

The angle I found is with some road forks I have lying around. I tried to look for the length of road forks but everywhere I looked just said "700c" which isn't very helpful.

Trail works out to be 79mm on a 42mm rake.