Time Trial / Time Trialling / TT

Seeing as it beats my best MG time by 11 seconds I think that's an exceptional time :0)

Windy but dry and reasonably warm.

t3?

It's exceptionally slow when you look at what has been achieved on MG

Yes, T3 unchanged from normal set up apart from 43/16 gear and 140mm cranks.

In terms of gain ratio , it's equivalent to using a 90" gear with my normal cranks.

Hmm. Think I'll be on 49x18 and a 23c tyre, with an emergency 48t (which is the same as 71.5'' on my normal cranks).

Fit the 48, you'll never get under 72" with 49/18 and 700×23C. You need a thin tread 700×20C to just about scrape inside the rollout with 49/18.

Really? Sheldon's gear calculator reckons 48x18 with a 23c is only 70.3".

I used 48x18 on (I think) 21mm tubs, this rolled out at 18ft 4 1/4".

That's why we went with the 25C last year. Not sure what algorithm Sheldon used, but just adding twice the tyre width to 622 to get the effective diameter is a common way to get an answer that is wrong.

That should have come to 18'6" by my calculation, you might have wobbled a bit when rolling it out, or the tubs might be a bit thinner than their stated size.

Weighted vs. non-weighted (no rider) tyre?

Rollouts are done unweighted

I don't actually know what width they are, perhaps 20s or 19s then!

Incredible scenes at the National 10, Hampton currently leading with 17:58

Bottrill wins with 17:40 (Second fastest 10 ever), Mullen 17:42, Hutch 17:53, Russell Hampton 17:58, Andy Jackson 18:02.

Championship record. And Mullen, damn.

Anyone want a Kask K.31?

Size + price?

They only do one size. It's one-size-fits-all. Inside it says 53cm-61cm
Price, I don't remember what it cost so whatever they go for on TTF/ebay.
Average sold price on ebay is £93.52 so £80?

It's one-size-fits-most. Inside it says 53cm-61cm

ftfy
At 7⅝, I'm restricted to helmets which go up to at least 63cm.

I didn't write their marketing blurb.

I reckon it'd fit bigger than 61. I'm around 61 and it fits easily.

Racing fixed with a power meter has proved to be very interesting.

Do tell