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Could a Thomson straight tube post be designed w/ setback?(7 posts)

Could a Thomson straight tube post be designed w/ setback?Fez
Jun 10, 2003 9:51 AM
I've heard some complain that the Thomson setback post looks goofy. More legitimate is that it requires a minimum extension due to the bend, a potential problem if you have a combo of a low standover and a very high seat collar.

So, could a Thomson seatpost have setback while retaining the straight post and the sturdy 2-bolt clamp design?

If they stuck with the 2-bolt system, couldn't they just make the front screw at more of an angle and design the rails so they allow 2cm of additional rearward travel?

Just wondering.
re: Could a Thomson straight tube post be designed w/ setback?TJeanloz
Jun 10, 2003 10:08 AM
I don't think you could do it - think of the stress you'd be putting on the bond of the clamp/tube interface. I think they'd need to go to a bulkier, forged bottom clamp half to get the job done.
Thomson = 1 piece. No bonding anywhere on the tube and head...Fez
Jun 10, 2003 10:27 AM
That's why I thought it was possible.

However, it would change from a symmetric to an asymmetric design.
ITM or Selcof...C-40
Jun 10, 2003 10:13 AM
If Thompson doesn't make it, your question is irrelevant. The front bolt of the Thomson clamp design does not permit setback, that's why they bent the post.

If you want a nice 2-bolt post with setback, Selcof and ITM offer models in Al, Ti or carbon. All good posts for the money. The front angle adjustment does require an 8mm wrench, but once the angle is set, you don't need the wrench to make fore/aft adjustments.

The ITM Millennium is about $60 in Al and $87 in carbon at Texas Cyclesport.
HypotheticalFez
Jun 10, 2003 10:40 AM
The question was hypothetical. Was wondering if the clamp, rail, and 2-bolt assembly could be redesigned without compromise to provide the setback while maintaining the straight post.

And from looking at the picture of the ITM seatpost, it is unclear how to access the front bolt for adjustment.
re: Could a Thomson straight tube post be designed w/ setback?Zogpound
Jun 10, 2003 10:16 AM
Race Face Already makes such an item, actually several.

http://bikesourceonline.com/site/page.cfm?PageID=268&SKU=ST6772
http://bikesourceonline.com/site/page.cfm?PageID=268&SKU=ST6774
The Thompson setback seatpost doesn't have..........MR_GRUMPY
Jun 10, 2003 12:15 PM
any more setback than a standard (1 bolt) seatpost.