Max seatpost height
#51
Senior Member
Join Date: May 2008
Location: Fredericksburg, Va
Posts: 9,579
Bikes: '65 Frejus TDF, '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '88 Pinarello Veneto, '88 De Rosa Pro, '89 Pinarello Montello, '94 Burley Duet, 97 Specialized RockHopper, 2010 Langster, Tern Link D8
Mentioned: 73 Post(s)
Tagged: 0 Thread(s)
Quoted: 1609 Post(s)
Liked 2,216 Times
in
1,103 Posts
So, I'm curious, from a structural engineering perspective, does the fact that the force typically comes in at an angle modify the 1/3 2/3 rule? Granted there are cases where the impact may be perpendicular, and I guess structural engineering is all about those worst case scenarios.....
__________________
Bikes don't stand alone. They are two tired.
Bikes don't stand alone. They are two tired.
#52
aka: Dr. Cannondale
Join Date: Jul 2009
Posts: 7,737
Mentioned: 234 Post(s)
Tagged: 0 Thread(s)
Quoted: 2156 Post(s)
Liked 3,412 Times
in
1,208 Posts
There is, admittedly, some variance in IM seatpost diameters. All of mine have been 27.0, across 85-86-87-88, but know that others have used a 27.2…although don’t know if those were from the factory or aftermarket fits.
At any rate, better to buy a new and longer post than have the insertion line above the lug. It’s there for a reason and put there by smarter people than us. Well, me, anyway.
At any rate, better to buy a new and longer post than have the insertion line above the lug. It’s there for a reason and put there by smarter people than us. Well, me, anyway.
__________________
Hard at work in the Secret Underground Laboratory...
Hard at work in the Secret Underground Laboratory...
#53
Senior Member
Thread Starter
Join Date: Jun 2012
Location: Stillwater, OK
Posts: 7,828
Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 1873 Post(s)
Liked 692 Times
in
468 Posts
There is, admittedly, some variance in IM seatpost diameters. All of mine have been 27.0, across 85-86-87-88, but know that others have used a 27.2…although don’t know if those were from the factory or aftermarket fits.
At any rate, better to buy a new and longer post than have the insertion line above the lug. It’s there for a reason and put there by smarter people than us. Well, me, anyway.
At any rate, better to buy a new and longer post than have the insertion line above the lug. It’s there for a reason and put there by smarter people than us. Well, me, anyway.
__________________
2014 Cannondale SuperSix EVO 2
2019 Salsa Warbird
2014 Cannondale SuperSix EVO 2
2019 Salsa Warbird