Fixed Time Trial Bikes

I'm comfortable riding in the drops for extended periods but have no idea how to translate that to aerobar height.

I read your earlier posts about riding a size smaller than a sprint frame (Koga) then dropping another size for your cervelo so you could have lower base bars with the aero bars raised to the same height and it made me more confused than I was already.

I appreciate there will be a lot of trial and error with regards to positioning but ideally I'd like to be able to do it without buying 2 frames so any advice is appreciated.

If you've been fitted by Scherrit, then give him a call.

You do know you're asking for an #internetbikefit, don't you?

With that in mind, I ride a Large (55cm) Look 585 and a Small (51cm) Cervelo T3, the respective reaches are 406mm, and 405mm, but I use the same saddle setback on my road and TT bikes.

Not sure where I am with stack, the Cervelo headtube is 66mm shorter and has a slammed -17°×100mm stem +60mm stack under the extensions, the Look has about 23mm of spacers and a -10°×°110mm stem.I think taking that all together the low point in the curve of my elbow cups is about 40mm below the top of my road bars, and the back edge of the cups ends up about 20mm behind the centreline of my road bars. Oh, and Pro Round bend bars, 80mm reach × 130mm drop, FWIW.

Of course, none of this is likely to help you, especially if you're thinking of sitting in a different position relative to your road bike, which makes it your fault for even asking :-)

Since you're already on a small road frame, it's very unlikely that whatever ordinary road/track frame (as opposed to specialised TT/Tri/Pursuit frames) you buy is going to be too small, so I'd suggest getting the 50cm if you've decide on a PreCursa, maybe even a 45cm

I'm aware that internet bike fitting is generally a bad idea but thought I should check to see if there's anything obvious that my lack of specific knowledge was making me miss.

Contacting Scherrit is likely the right course of action.

Thank you both by the way.

Do you need some extensions Em? I have a pair of bull-horns with extensions on, and a brake lever thinking about it, which you'd be welcome to.

This summer I did a 36 km (moderately hilly) time trial @ 38.5km/h and 13km flat time trial @ 40.7km/h on my Seta with 50:16 gear ratio.
Aero helmet and disc helped me break the 40km/h barrier finally!

Picture credits: Touho Häkkinen

Aero helmet and disc helped me break the 40km/h barrier

And flappy jersey slowed you down.

Good effort! Where are you riding, surprised they let you run a TT brakeless....

Just getting a tight jersey could be worth 15s in that 13km TT
https://www.youtube.com/watch?v=_p8SdRRe1fo

Thanks! These were very small local club events in central Finland. I actually would have liked to have a brake, since the halfway turn was not on a top of a hill.

Probably going to buy one piece suit or a new jersey next year with a tighter fit. I didn't realize my jersey is so loose. Our club didn't have race fit jerseys available when I bought mine years ago. Anyway my main focus is in geared road cycling so fixed TTs are just for fun and good training.

A brake would probably improve your time slightly if there is a turn involved, would enable you to remain on full gas leaving braking a lot later. Stopping a large gear brakeless would take a fair distance and sap energy that could be better used creating forward momentum. Keep at it though!

Ooof. Is that yours?

Nah, some bloke on the TT forum's. I think I've raced him before though.

Big ol bertie big bollox gear on that burls...

gotta be 120" or more! rad bike

some bloke on the TT forum's.

Whose? JJLowden on there has a Ti fixed, but it's an Enigma.

http://www.timetriallingforum.co.uk/index.php?showtopic=23238&st=780#entry1298909

In 2012 i raced against someone on a Ti SS (freewheel) TT bike, not sure who that was.

Bit of internet hunting reveals it was Chris Hulme:

Not same frame...

In reference to:

In 2012 i raced against someone on a Ti SS (freewheel) TT bike, not sure who that was

Ah

Me on my mad commuter thing doing an 10 mile hilly, wet, windy Tt. Normal time would be about 27/28 so hardly setting the world on fire, but plenty of beer a few hours earlier, unexpected hills, wind, 68" fixed, silly carbon risers and all other excuses I can think of = 30min30sec

I thought that was a good time considering!

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