Bouncy seat post on the Creo Expert?

[Angelo_arch]

The Expert build comes with the Roval Terra Carbon Seat Post which has a 20mm Offset. I’ve got 43 Pathfinders on the bike and pumped them up a little higher (35 psi) for some pavement and hard pack gravel on last night’s ride. On the gravel, there were some ruts and potholes and I noticed what I thought was some extended bouncing on the bike's rear end. Not sure if it was just the spacing/frequency of the ruts or what, but it was definitely a new sensation for me! Anyone notice this? I'd rather a seat post soak up the bumps, not make it more pronounced and extend them. Haven't been on any washboard gravel yet, which is probably the true test.

 

[Stefan Mikes]

So you increased the tyre pressure to make your ride more bumpy?

 

[Angelo_arch]

So you increased the tyre pressure to make your ride more bumpy?

Ha, no they shouldn't be bouncing me around at that pressure! I would assume a rougher ride on harder surfaces.

 

[mschwett]

hard to say if that's the right pressure without knowing your weight, etc (for gravel on tubeless (?) 43mm tires, 35psi is about right for a 170lb rider on a creo) but occasionally the frequency of bumps corresponds to a natural resonance of the bike-rider system... a carbon seatpost and bike are good at soaking up certain frequencies of vibrations, and not too effective on others.

my creo has a different carbon post than yours (a specialized non-roval carbon post), and i have a wheelset with 42mm knobbies, and i don't think i've ever noticed any unusual bouncing or vibration compared to other hardtail bikes. riding a bike without suspension on rutted roads is just a bouncy thing though! time to get out of the saddle

 

[e-levity]

As mschwett says you have to get your weight on your feet/legs and off the seat when it's rough. Completely off when really rough.

If I wasn't using a PNW 90mm dropper post and Ergon SMC Core Prime saddle I'd probably to with a Specialized CG-R ("Cobbler Gobbler") post to help with seated comfort.

 

[Dazmanturbo]

On my Creo, I use a Canyon S15 VCLS, which is a carbon leaf spring and utterly awesome. It is also known as Ergon CF3. It gives a lovely bit on movement to match the Furture shock. They are not cheap, but so worth it.