Stems
08-07-20, 06:56 AM
#1
Junior Member
Thread Starter
Stems
As a 350 lb. rider, would a LOW degree of stem offset be safer?
HIGH degree of stem offset looks dangerous to me. (see pics)
HIGH degree of stem offset looks dangerous to me. (see pics)
08-07-20, 07:11 AM
#2
Senior Member
First things first - those are seat posts, not stems. Second, the offset is safe.
What you really should be concerned about is which seatpost is necessary to get your bike to fit you correctly. For me my bike fits best with a post with no offset. But everyone and every bike is different.
What you really should be concerned about is which seatpost is necessary to get your bike to fit you correctly. For me my bike fits best with a post with no offset. But everyone and every bike is different.
08-07-20, 01:45 PM
#3
Expired Member
Join Date: Jun 2007
Location: TN
Posts: 11,507
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 3657 Post(s)
Liked 5,393 Times
in
2,738 Posts
Time to get off the pot and on to a saddle
08-07-20, 06:51 PM
#4
Senior Member
Join Date: Sep 2009
Location: Up
Posts: 4,695
Bikes: Masi, Giant TCR, Eisentraut (retired), Jamis Aurora Elite, Zullo, Cannondale, 84 & 93 Stumpjumpers, Waterford, Tern D8, Bianchi, Gunner Roadie, Serotta, Serotta Duette, was gifted a Diamond Back
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 305 Post(s)
Liked 2,038 Times
in
604 Posts
use the one that gives you the best fit.
08-09-20, 12:35 AM
#5
got the climbing bug
Join Date: Jan 2005
Location: San Diego
Posts: 10,204
Bikes: one for everything
Mentioned: 82 Post(s)
Tagged: 0 Thread(s)
Quoted: 632 Post(s)
Liked 908 Times
in
273 Posts
Offset is for fitting to the bike.
2 bolt design will be best and easier to adjust angle as needed for the rider.
2 bolt design will be best and easier to adjust angle as needed for the rider.
__________________
Rule #10 // It never gets easier, you just go faster.
Rule #10 // It never gets easier, you just go faster.
08-09-20, 06:49 AM
#6
Junior Member
Thread Starter
08-09-20, 10:15 AM
#7
Senior Member
Join Date: Sep 2009
Location: Up
Posts: 4,695
Bikes: Masi, Giant TCR, Eisentraut (retired), Jamis Aurora Elite, Zullo, Cannondale, 84 & 93 Stumpjumpers, Waterford, Tern D8, Bianchi, Gunner Roadie, Serotta, Serotta Duette, was gifted a Diamond Back
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 305 Post(s)
Liked 2,038 Times
in
604 Posts
Strength depends on the construction of the seat post, some are better than others. I just like the 2-bolt because it is easier to zero in the tilt on the saddle. Just make sure the two bolts are orientated front to back not side to side ( I have seen a seatpost with this design).
Last edited by cyclist2000; 08-09-20 at 10:21 AM.
08-11-20, 12:32 AM
#8
got the climbing bug
Join Date: Jan 2005
Location: San Diego
Posts: 10,204
Bikes: one for everything
Mentioned: 82 Post(s)
Tagged: 0 Thread(s)
Quoted: 632 Post(s)
Liked 908 Times
in
273 Posts
2 bolt design with one forward and one behind has now shifted that load on the threads of the usually stainless steel M4 to M6 bolt. Yes it's easier to fine tune angle because you're no longer in the mercy of grooves lining up like above.
The 2 bolt design pull on each other at recommended tq setting and I haven't had a seat slip. Even in the event of crashing, the seat goes sideways but the angle is not askew.
Offset has to do with bike fit (getting the knee placed correctly) or you have a really long femur bone than average. If you need longer than 20-25mm like most offer, your bike frame is too small or If you are long boned in the femur, look at Thomson seatpost but won't be cheap.
Seatpost fits the bottom half, stem length fits the top half, but you can't out fit a wrong size bike.
__________________
Rule #10 // It never gets easier, you just go faster.
Rule #10 // It never gets easier, you just go faster.
08-11-20, 07:38 AM
#9
Senior Member
Join Date: Sep 2006
Location: Paradise, TX
Posts: 2,087
Bikes: Soma Pescadero, Surly Pugsley, Salsa Fargo, Schwinn Klunker, Gravity SS 27.5, Monocog 29er
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 186 Post(s)
Liked 234 Times
in
166 Posts
The set rails are generally weaker than the seatpost. I see those bend or break long before the seatpost fails most of the time. In 20 years I have had 2 of the single bolt type fail, the splines stripped out and the saddle would not stay level anymore. I loctite the splines and bolt now once I find a good fit. The only post that I have broken off totally was on my old 1953 Schwinn DX. I have a solid bar inside the seatpost for it now. I have not had a 2 bolt clamp fail.
