Which cassette?

[Jack Hughes]

What gear are you in when you are going at your top speed in a TT, on the flat! without much in the way of tail or head wind?

[CCS]

Spooky, but youngest child had a reading book from school last year, where the story centred on a cassette - she had no idea what one was !
All showing your age (as am I)

[CCS]

Do you remember what the highest ans lowest you used were?

Not really.... know that on Hcc175, I didn't have high enough gears on the hill start even in the 11; conversely at the Vit, was in the small ring and the 28.
In general, don't use the small ring though - probably on the flat, tend to be somewhere mid-cassette (though don't tend to look). Think race cadence is usually around 90, though natural instinct is to grind away in a big gear.

[King Sad]

If you use mid cassette a lot then suggest that something like the SRAM PG1070 11-23: 11-12-13-14-15-16 -17-19-21-23 this gives a one tooth progression through the top to mid range which is what you are using. You can keep a constant cadence compensating with any minor variation in the road by just snicking up or down a gear. If you have a 2 tooth variation in your usable range then your cadence may be thrown.

C90 Chrome, Memorex I think was my favourite, never too keen on the metal. C6o waste of time and C120 too fragile. Bet these young pups are Googling C90 to see what we are talking about.

[King Sad]

If you use mid cassette a lot then suggest that something like the SRAM PG1070 11-23: 11-12-13-14-15-16 -17-19-21-23 this gives a one tooth progression through the top to mid range which is what you are using. You can keep a constant cadence compensating with any minor variation in the road by just snicking up or down a gear. If you have a 2 tooth variation in your usable range then your cadence may be thrown.

C90 Chrome, Memorex I think was my favourite, never too keen on the metal. C6o waste of time and C120 too fragile. Bet these young pups are Googling C90 to see what we are talking about.

[Jimba]

78s anyone?

[jonathon.e]

78s anyone?

Hang on, I will just move the sliding control on my gramophone from 33 to 78 and I am right with you

[King Sad]

Yes I do have wind up gramophone and in fact my earliest recollections of playing recorded music was 78s

Anyway, just had another thought, Claire your 11-28 is it like mine a SRAM PG 1070?
If so the 11-28 is: 11-12-13-14-15-17-19-22-25-28 so a 1 tooth spread for the first 5 as opposed to the first 7 on the 11-23. So it depends on which ones you are using. Another thought are you just using the bing ring or are you flitting between the two, if the latter have you thought about getting a 42 inner ring for TT's? That will give you a nice tight set up.