Time Trial / Time Trialling / TT

I mentioned that the instructions about the slip road were confusing when I first rode that course and got a bit of attitude from the organiser. I cant remember the exact details but it struck me that they thought they were making it clear but in reality there was room for interpretation.

On the turning off dual carriageways very late, I was terrified at times while marshalling the exit slip at the turn on the e2/25. It would be very easy for a driver to assume you were going straight on and go up the slip as the rider dived left.

Also, people riding up the right hand side of the slip road from the start are idiots. At one point two riders arrived close together and a driver undertook one and overtook the other on the slip road as one went up the left and the other up the right.

People have been knocked off there before (staggy )

He was knocked off on a different slip road. The issue at the finish was cars ending up inside riders who then dived into the slip road (and therefore the path of fast moving cars) at the last minute

On another note, what size tyre should I be using on a Corima Clincher disk? The outside width seems to be about 20mm so I was thinking of a 20mm gp4000 as I ride to races.

I've ridden to races on my conti supersonic and had no issues.

Probably be fine with a 23mm as it's on the back. Corsa Speed Crr would probably make it a faster option

What tyres is Hayley using? Is that the corsa speed?

https://pbs.twimg.com/media/C918eMNXYAAIiUc.jpg:large

Maybe I should swap my supersonic for a corsa speed?
http://www.bicyclerollingresistance.com/road-bike-reviews/vittoria-corsa-speed-2016

Looks like a Corsa Speed on the front and a Crono on the back. Front wheel doesn't look like anything special and I think she's still using a drag2zero disc.

I've been well impressed with my supersonic tbh, it's not even got any crap in it, and I must have done 100 miles on it now, including riding to and doing a hardriders event and several TTs last year.

No doubt I'll not puncture next weekend when on for an 18.

I'm confused, is it this Corsa Speed you are talking about?

bicyclerollingresistance.com only appear to have tested it tubeless, is it faster with tube as well?

is it faster with tube as well?

@xavierdisley reckons it's faster with a latex tube than tubeless

Interesting, his review says:
This tire can also be used with an inner tube, but you should add about ~ 3 - 4 watts for a standard 100 grams butyl tube and 1.5 - 2.0 watts for a latex tube.
So if that's the case (I'm not saying it is) then the Conti TT would be 1.5-2 watts lower as it was tested with butyl and the Corsa Speed would be 1.5-2 watts higher so the TT would be faster.

this. I was using 19mm one on the front. Never ever let me down. Including riding 16 miles to my local weekly TT, doing 10 or 25 and then home again. It was retired due to the surface eventually starting to crack up after 2 years.

ah yeah, I've the 19 too.

I was given DNF for yesterday.

I know what I got though, and I'm proud of it considering I was starting to feel ill and feel rotten today.

We're doing more testing with Corsa Speeds at the moment with the upcoming wheels, I reckon there'll be a combo where tubeless is basically as quick as a latex tube but with obvious benefits!

Hayley's bike doesn't normally have that mid section front, she's got a Pro3 with (currently) a 24mm Crono on it.

I got one too! But that was because my front skewer departed my wheel going down the bank in Wales at high speed.

On Sunday?

Shit! Are you alright?

Most people don't pop wheelies going down there so I assume the wheel stayed in place.

Fire your mechanic :)

Twas particularly quick down the bank on Sunday too, with speeds of 50+mph being achieved by some.

@onyerbike crap, hope it stayed on. I realised my front wheel was not properly done up the other day but luckily it was just nipping about town, and it stayed in place.

@xavierdisley I assume not all latex tubes created equal, do you have a favourite?

Lol - yes the Vittoria latex ones are good and don't lose air as quick as Michelins. Have removable cores and are cheaper than Challenge.

I would have serious squeaky bum time if I saw my skewer fall out on the descent down R25/3 - Rob West got the Strava KOM on Sunday averaging >75kph for 3min:

https://www.strava.com/activities/964600663/overview

I like Vittoria because they're pink, usually the cheapest, have removable valve cores for good valve extension setup and are nice and short so aren't a pain to inflate if you have a shallow disc valve hole.