A seatpost is a pretty utilitarian component, but it still has to do its job well without creating issues. 3T's DiffLock Pro 0 Offset Seatpost gets it done with a tough aluminum alloy construction, zero-offset design, and 3T's unique DiffLock clamping mechanism.
DiffLock's interlocking splines hold your saddle rails precisely to within half a degree for perfect alignment, and require minimum torquing force, so your saddle is easy to adjust, even mid-ride. Sliding it fore and aft won't alter the saddle angle, either, so you can utilize the DiffLock's full range without worrying that adjustments will affect your riding.
diffLock is terrible
- Familiarity: I've put it through the wringer
Only reviewing here because 3T doesn't have a review section.
Every DiffLock seatpost comes with bolts that are too short. The system requires you to thread in each of the saddle clamping bolts at the same time, otherwise you end up pulling the saddle to one side or another. There's about 3 threads of engagement on the stock hardware if you're somehow able to get both bolts threaded in evenly, even so, bringing the bolts up to 4-6nm WILL strip the threads of the hardware. Unless of course if you have longer bolts with a rounded head just kicking around.
On top of all of that, you have to completely disassemble the saddle clamp hardware to adjust the angle of the saddle.
A branded seapost that will break itself if you don't know what you're doing the first time -$110
knowing 3T warranty deletes my voicemails when they look at the caller ID - Priceless