|How much setback on USE alien||spookyload|
Oct 27, 2002 5:14 PM
|I have narrowed it down to a Woodman carbon and the USE alien. The last determining factor is the amount of setback on the alien.|
|I'd say virtually none . . .||Look381i|
Oct 28, 2002 4:53 AM
|and that's why I bought one. I went from a 74 to a 72.5 seat tube angle with a new bike. With the 74 I use a Campy seatpost with a lot of setback. Measurements confirmed that I could maintain a good position relative to the bb on the 72.5 by using a seatpost with no setback. The Alien offered that. If you look at a side view of the post and follow the axis of the post up through the clamp, you will notice two things. Any fore or aft movement of the clamp will change the angle of the saddle. Midpoint in the clamp, where the saddle angle is likely to be about right for typical seat tubes angles, is very close to the axis of the post. |
By the way, if you are thinking of the carbon Alien, as it appears you are, you might need to research the size as well. (My Alien carbon is a 25.0 for my Look frame.) Even though the Alien comes in a 27.2, some (e.g., Cambria Bike) advise using the 25.0 with a shim even for frames that require a 27.2. That is probably to avoid scraping off carbon and possibly weakening the post during insertion into a tight seat tube. (Remember, with carbon, you cannot lubricate the post or seat tube.) I think most use the 27.2 successfully anyway.
Finally, there is the clamp adjustment issue. By following directions, my set up went smoothly. Many complain that readjustment of angle is very difficult. I think that following directions makes the process much easier, but it is still likely to be more of hassle than with many other designs.
Net evaluation: My Alien works well, seems strong and well-built, and might be more comfortable that an alu or ti post, but it's hard to say. I weight about 170, and the Alien has lasted almost three months and 2500 km. I hope it lasts many years and kms more.
|skip the alien||neil-qcw|
Oct 28, 2002 5:39 AM
|I have put about 3k mi on my alien, and I am about to sell it and get a am. classic. It requires constant attention because the bolts loosen over time. Yesterday, mid -ride it self adjusted for the third time since i set it up. because of the size of the bolts, you cannot put on any real force to tighten them. Set up or adjustment takes 15 to 30 minute. why bother?|
|Never touched mine after 8K miles...||biknben|
Oct 28, 2002 6:13 AM
|Sorry to hear about your probs with the alien. I've made one adjustment since I installed mine and haven't thought about it since.
I doubt your issure with bolts backing out is common. Have you tried lock-tite?
The clamp is far from the norm but I've found it to be solid and dependable.
|27.2 w/ lube...||biknben|
Oct 28, 2002 6:23 AM
|I've got the 27.2 post installed with lube. I haven't heard of the "no lube on carbon posts" rule. Much less likely to damage the post during insertion if you put some lube on it.|
|USE instructions say . . .||Look381i|
Oct 28, 2002 6:37 PM
|"(c) Degrease the inside of the frametube with a strong degreasing solution before installation. Do NOT grease the post or the frame as it will only encourage the post to slip and therefore encourage overtightening of binder. . . (f) Do NOT overtighten the seat post binder bolt! Excessive tightening can lead to carbon tubes being crushed. . . Excessive tightening will damage the post. TIGHTEN JUST ENOUGH THAT THE SEAT POST SUPPORTS THE RIDER'S WEIGHT . . . "(emphasis in original).
My Look seat post binder is of a design that minimizes the chances of overtightening. I had to apply very little torque to keep the post from slipping. It has been fine for the first 2500 km.
I would think that slightly soapy water might work, so long as it is allowed to evaporate before tightening and riding for the first time, but that's just a guess.
|re: How much setback on USE alien||Juanmoretime|
Oct 28, 2002 6:57 AM
|I have Alien ti posts on both my mountain bike and road. I consider it a center over post although you can dial in some rearset. The bolts can be a pain, at least with me, once they were set, no problem. I did buy a box of spare bolts from a fastner place and have stripped out a few getting the adjustment just right. I like the post quite a bit but it your a person that likes to frenquently adjust your saddle position, look elsewhere.|
Oct 28, 2002 7:31 AM
|As others mentioned, any adjustment to angle will also change your setback. I use 5cm, so the Alien didn't work for me (the aero model has more setback). However, the new Eastons have lots of setback, so I've gone to them on both my road bikes. It's a one-bolt clamp with the serrations, but I've never had trouble getting the angle I want. Finally, it's not as feather-light as some of these other seatposts, but, c'mon, who are we kidding.
To add another to your list, the Deda Blackstick has a fairly standard setback and there's always the Campy Record.