TT Bike Fit Question

[keno]

I'm toying with the idea of doing some TTs next season. For that I would need an additional bike to do it properly. I'm not currently in the mood to go custom and spend that kind of money, as much sense as that would make considering my Ottrott is 60/59.5 with a 71.5 deg seat tube and 130mm stem. I'm very careful with the knees, as they both have problems, so I like a stroke that keeps the knees a bit back of the pedal and I obviously like a laid back position (setback on my seatpost is about 40+mm - Oval Aergo).

If I were to look for a used TT bike, what geometry would make good sense based on what I've said above?

Thanks,

keno

[stevep]

i thk would make the most sense to take one of your old bikes ( gotta have one or 2 ), rise the stem a little, slide the saddle forward a little, throw aero bars on it and go for it.
if you love it ....next year look into spending a little cash on something.
imo tt bikes are a complete waste except for a true specialist.

[Smiley]

if KOP is an issue , good luck finding any TT rig with anything but a + 73 STA and thats if your lucky . Splurge on a CXII frame . Have fun in Hawaii

[ergott]

Remember that TT position is usually a rotation forward of the contact points with respect to the cranks. You maintain the saddle to bb and move that radius towards the front of the bike. Then you do the same with the radius of the cockpit to bb.

[zap]

Keno, two schools of thought on tt position.

1. Most common is to Rotate forward. This makes it easier to get into the aero position but is tough on not so pristine knees.

2. Maintain your current saddle position and get your torso as low as possible. This will allow you to continue using the biggest muscle (but stretched more) to propel you forward and keep your knee friendly position. It's not easy but regular training at really low position helps. This is my favored option.

One problem though. If you're carrying anything extra, you won't be able to get low enough.

So, if you can find one, buy a used Look KG196. It's a wicked fast bike. As :) mentioned, you will need a 73 st. Mine will fit you plus it has the mega adjustable Look seatpost and integrated ergo stem.

It's not for sale but you can drive down and give it a spin.

[keno]

From what you say collectively, my problem may be a set of aero bars away, unless what you are saying Zap is go without them. I have a Lemond ti bike with a 73 deg seat tube I use on the rollers. Sounds like my new TT bike.

If I need the aeros, what say on the bar end stuff? Maybe do only flat TTs and find a gear I like and brake after the finish line?

Unlike you, Zap, wicked fast is not a criterion for me. Let's leave it at wicked.

keno

[zap]

Get bull horn and aero bars for the Lemond.

[manet]

From what you say collectively, my problem may be a set of aero bars away, unless what you are saying Zap is go without them. I have a Lemond ti bike with a 73 deg seat tube I use on the rollers. Sounds like my new TT bike.

If I need the aeros, what say on the bar end stuff? Maybe do only flat TTs and find a gear I like and brake after the finish line?

Unlike you, Zap, wicked fast is not a criterion for me. Let's leave it at wicked.

keno

i have two sets of geek bars you may borrow.
i implore you, to not get any suntan oil, coconut or otherwise on them.

[manet]

ken'07