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Uhhh...seat angles and base bars?
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Nope, didn't quite understand all that. I'll have to try reading the next rehash. :)

In the meantime, I guess I'll just keep tweaking the angles of my seatposts, aero bars, and seat to try to find a comfy, fast, and aero position on my wanna-be-tri-bike TCR2. I'm sure by summer I'll have tossed the Syntace C2's and gone back to the traditional slacked road bike position anyway.



~ A penny saved is a government oversight.
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Re: Uhhh...seat angles and base bars? [TCR2] [ In reply to ]
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Bottom line: A road bike will never be a tri bike, a tri bike will never be road bike, with the usual "big slam" exceptions of course.

Tom Demerly
The Tri Shop.com
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Re: Uhhh...seat angles and base bars? [TCR2] [ In reply to ]
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I'll predict your prediction is right! I tried, to no avail, to convert my TCR to a TT machine. WAY too much weight on the front wheel to make it work for me. I tried the slam on it for a while, but, I'm faster in a forward position, AND I convert to the run quicker after riding in a forward position.



Quid quid latine dictum sit altum videtur
(That which is said in Latin sounds profound)
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Re: Uhhh...seat angles and base bars? [TCR2] [ In reply to ]
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I have a TCR-1. The TCR series is a really good road bike and can be set up as a decent bike for tris. Let's not forget that Luc VanLierde won IM Hawaii with the fastest bike split on a TCR in 1999. There are two ways to set up a TCR for tris that I've tried.

1) Forget about going to 78 degrees on a TCR. I tried it with with a Profile forward seat post. It throws the bike off balance with too much weight forward since the TCR is designed as a road bike. However, it works very well at 75-76 degrees, which is what the Team Once TCR TT bikes run with their custom frames. This can likely be accomplished by jamming the seat right back on a forward post or a better alternative would be to spend forty bucks on a M2 Racer seat shifter. This is new on the market and should allow you to dial in your seat position accurately. Just got one for X-mas and it looks as if it works really great. You'll be moving your seat three or four cm forward so also drop your bars as to have the same effect as lengthening your top tube. This will also allow you to get more aero. I could get quite low on my TCR with the 75/76 angle. I"ve used Syntace C2 aero bars with this set up and they work great. Here is a nifty site written by Dan Emfield that has a chart that shows how to figure your approximate seat tube angle by measuring the saddle tip with a plumb line in relation to the BB and saddle height. http://www.slowtwitch.com/...techctr/bikefit.html

2) The other alternative is the "big slam" position as described by John Cobb. Jam your saddle right back, lower your seat by about an inch and get a pair of the big slam specific Profile Jammer GT aero bars that are shorter than normal tri aeo bars. You may also wish to run a slightly shorter stem than normal. You are now mimicking a riding position like Greg Lemond, Steve Bauer or a number of the current Euro pros at a seat angle of 72 degrees or so. According to Cobb and some others, this is a more powerful position to ride in, at least for some people. There are three articles available in the "tech section" regarding the big slam and another article in "Dave's Page" Check it out.

http://www.bicyclesports.com/index.html
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Re: Uhhh...seat angles and base bars? [cerveloguy] [ In reply to ]
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Excellent info. Cerveloguy!

The M2 Racer looks like a great idea. I've never seen that before. Does this actually allow the seat to move forward and back, not just the tilt? Can this be done on the fly, while riding?

The "big slam" seems to be the opposite thinking of the traditional forward, over the bars, tri positioning. I don't see how creating a more acute angle with the upperbody vs. the legs can create more power. Anyway, this gives me a lot more to think about and try out. Thanks.



~ A penny saved is a government oversight.
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Re: Uhhh...seat angles and base bars? [TCR2] [ In reply to ]
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TCR2,

Yes, the M2 Racer seat shifter (they call it Power Modle) moves the seat forward/backward and you can do it on the fly, although I probably wouldn't except when on a course with lots of varied terrain. Another brilliant thing about this product is that as it moves forward it compensates and moves your seat higher and viceversa as you move backward. It seems like a well thought out product. Here's Dan Emfield's review:

http://www.slowtwitch.com/...product/m2racer.html
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