Time Trial / Time Trialling / TT

Supersonic 20c, a winning combination of speed and aerodynamics. I've always found them to be surprisingly tough, but you might find a GP4000s 20c slightly tougher.

Really wanted to get down for that! Would be a brutal start to the season.

It was. At one point on the A10, 260/270 watts was worth about 27/28kph. On the flat.

Turns out I and two other EDCC riders won the team prize at Hardriders. £20 to blow on coke and midgets.

Early season victory!

First ever prize in an open competition for me. I shall now await the cash rolling in from a lengthy run of victories...

Thanks @umop3pisdn I think I will prob go for the gp4000s. I know they will be slightly slower, but you can't have everything.

im gonna curse myself and say supersonic too, i rode about 600 miles of TTs and there/back on one last year without a single flat, q puncture fairy.... . The 'sonic makes a noise all of its own, very distinctive.

I know they will be slightly slower

Citation needed. The rolling resistance is very close, and the tread on the GP4000S seems to act as a trip, so some wheels have less drag with a 4000 than they do with a completely slick tyre.

the tread on the GP4000S seems to act as a trip

You keep saying this, do you have a source?

do you have a source?

Not off the top of my head, and I'm not about to embark on a lengthy quest on my phone, but that new Swiss wheel company (Swissside?) or maybe Flo tested different tyres and one or both found the 4000s had good aeros IIRC.

My point was that @cjr said he knew the 4000 would be slower, and I wouldn't have been so confident. It might be slower with his wheels at his speed, but I wouldn't want to stake money on its being slower for all wheels at all speeds.

Gonna have to watch my wording on here! I was basing my rash assumption on what I have read about the difference in rolling resistance between the two. I (probably falsely) assumed that the difference in speed between the two was mainly down to that.

anyone else doing the HWCC 10 on Good Friday?

Have entered and it will be my first ever open 10 (I started with 100 and have worked my way down the distances)

any idea how much quicker it is than H10/2 looks like @umop3pisdn was about 10 seconds quicker there last year....

It's probably about 45 seconds to a minute quicker than the H10/2, all else the same.

I'd like to ride it, but no idea if I'm free. It's one of my favourite courses.

20:53 H10/22
vs.
21:58 H10/2

for me. I won the H10/2 race though and was about 10th in the H10/22 so not sure what that proves. Enter slower courses if you want to win? :)

The H10/22 was damp but the H10/2 was windy as buggery.

Mind the potholes...

I'll take 48 seconds...

I'm also not sure I'll be able to ride, as the wife wants to go on holiday, but I'm resisting..

I think I might be in Amsterdam. I might wait until later and go full out by riding proper cheat courses only.

I can't understand the idea of driving for 3+ hours for a 10 mile TT, only way id do it is if I happened to be up there anyway, which is unlikely as its in Hull....

@hippy that looks similar to my bars at the end of Windsor tri last year, thankfully no damage done on mine, and blue Loctite has meant I've had no recurrences since..

I didn't necessarily mean the Hull course but I do want to race that at some stage because, fuck it, it's only petrol and that'll never run out...

Problem with Hull is its such a lottery - I went with a mate who'd ridden it two weeks prior in perfect conditins and he was 50s slower when we both went. I did 20:40...

What was your time on the H10/22 last year?

21:35 maybe?

that's what it said when I was stalking earlier...

So, that's 10s - 60s faster potentially, for £30 worth of fuel. A new stem will almost certainly save me less time than that and cost 10x as much. Put it that way and V718 makes perfect sense :)

I always said I'd not go out of my way to ride a cheat course but since I'm now chasing club records and not much else, why handicap myself riding only local courses?