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Saddle Setback(15 posts)

Saddle SetbackTFerguson
Aug 20, 2001 8:15 AM
I'm having trouble getting back far enough on my newly built Classic. I'm using a Am. Classic post with a Terry Liberator Ti saddle set back as far as possible. I'm 5-8 and using 175 mm cranks. Using the plumb line from the front of the knee, I still need to go back 2+ inches!! I wouldn't want the top tube any longer so a bigger frame probably isn't the answer and I would like to keep the aggressive geometry of the Classic.

First I'm considering a setback post such as the Profile (turned backwards) or the Look Ergo.

Second, can anybody tell me what saddle(s) have longer rails towards the front to allow for more setback.

Any comments or help would be appreciated.

Thanks,
Terry
Yikes!!! How long are your thighs??Cima Coppi
Aug 20, 2001 8:35 AM
It sounds like you may have a body proportion issue that does not bode well with your current frame. You're correct that a longer top tube is not the answer, but a frame with more set back on the seat tube is. Do you know what the seat tube angle is on your frame? You can get the necessary setback from the other seatposts you mentioned above, but I'd seriously consider how well your frame is (or is not) fitted for you.

CC
Yikes!!! How long are your thighs??TFerguson
Aug 20, 2001 8:51 AM
The Litespeed Classic has a seat tube angle of 73 deg. I have never thought of my thighs as unusually long, but then I can only see them from the top.
I haven't had any trouble setting up other bikes but this is the first strictly road bike I've had. The others were hybrid, hardtail mtb, sport touring (Bianchi Volpe with 73 deg seat angle but a more relaxed head tube angle), and a fs mtb.
Terry
Next question, are you measuring plumb correctly?Cima Coppi
Aug 20, 2001 9:30 AM
Your Lightspeed Classic geometry certainly is not out of the ordinary, and 73 degrees STA is about industry average for a road frame.

Are you measuring plumb from your knee correctly? You should be measuring plumb from the front of the knee cap down over the center of the pedal axle. Make sure your pedal cleat is also adjusted correctly placing the ball of your foot directly over the pedal axle. This really does not affect KOP, but just in case you are not aware of this fitting.

You may already know all of this information, but I'm just making sure you have covered your bases before you spend more $$ on a new seatpost.

CC
Yea, checked CO Cyclist to be sure.TFerguson
Aug 20, 2001 9:38 AM
Sounds like the seatpost is the only way to go then...Cima Coppi
Aug 20, 2001 11:58 AM
I just checked CC's website. Make sure the Profile seatpost has enough level adjustment to be turned around. It's difficult to tell from the photo. The price is very good compared to the Look post, but you may have to go with the Look to keep the seat level.

I know that the Look post has favorable reviews, so it would be a good option for you.

Good Luck,

CC
Also, check this out...Cima Coppi
Aug 20, 2001 12:10 PM
Excel in Boulder has a Thompson seatpost w/ extra setback.

http://www.excelsports.com/item.asp?major=1&minor=19&description=Seatpost+Elite+SB&vendorCode=THOMSON

CC
That won't helpRacer-x
Aug 20, 2001 12:47 PM
That post doesn't have extra setback, it has the same as every other standard post (about 20mm I think).

The regular Thompson post has zero setback by virtue of the clamp sitting directly in line with the post. This one has a bend in it to get the clamp in the same position it would be with any other post.
re: Saddle SetbackMGS
Aug 20, 2001 3:41 PM
The Corima Carbon seatpost has an unusually large set back.

Expensive but check it at Colorado Cyclist.

They do offer a return policy is the item is as new.
Campy postsEric H
Aug 20, 2001 3:49 PM
You might want to try a Campy post as they have fairly generous setback. The older (1995-7) Record post (round, aluminium) has a little more than the current Ti, steel or carbon posts.

As for saddles, both the Selle Italia Flite and San Marco Era have fairly long rails which allow for the saddle to positioned a little more rearward.
Thanks for all replies. I'll keep trying.......TerryTFerguson
Aug 20, 2001 4:02 PM
Just try this before you order more parts.Atombomber
Aug 20, 2001 5:31 PM
Check that your cleats are installed such that the pedal spindle is under the ball of the foot. When that is 100%, then do the String Bob test, measuring behind the kneecap, not in front (between the femoral head and the patella). Just seems odd that you require SO MUCH setback.

The other option is to find one of those goofy bikes that Steve Bauer had built for Paris-Roubaix back in the late 80s or early 90s (don't recall which). 67deg seattube if I recall.
Pay to have a fitting done...tirider
Aug 20, 2001 6:59 PM
...if you didn't buy it at a local shop. Two inches sounds extreme... make sure your saddle isn't too low which effectively brings your knees forward as would a saddle which is wide in the back. I'm not familiar with that saddle but a narrow one would position you farther back. Again get someone qualified to look at you before you throw money at seatposts with excessive layback which can throw off the handling dynamics of the bike.
re: Saddle Setbackmackgoo
Aug 23, 2001 7:26 AM
What size frame do you have? I'm thinking that at 5-8 those cranks are sort of long but even with 170's you'd only make up not even a 1/4 of an inch.
Another interesting thing I stumbled across is this. http://www.bicyclesports.com/technical/positioning/fitessentials.html
Check out how they are measuring seat set back.
55 cm Litespeed Classic (2000)TFerguson
Aug 23, 2001 9:51 AM