Which length seat post needed?

[Rustybucket]

i have the below bike:

https://www.evanscycles.com/genesis-day-one-alfine-di2-2014-cyclocross-bike-EV200682

I'm looking to change the seat post, what length would be best out of 300 and 400? The bike currently has 350, but I can't see that length post in Evans.

Thanks

 

[S-Express]

Do you mean 'stem' or 'seatpost' - they are two different items.

Assuming you mean seatpost - just measure how much of your current post is still sitting in the seat tube? And then work out whether you would be ok with a 300 or not. Alternatively, simply look elsewhere for a 350.

Incidentally, why are you changing the seatpost?

 

[Rustybucket]

Meant seat post -

 

[Rustybucket]

As it sits too far back, need something more straight at the top

 

[HLaB]

I'm guessing its perhaps the setback rather than the length your wanting to look at. FWIW my post has zero set back.

 

[bonsaibilly]

I'm guessing its perhaps the setback rather than the length your wanting to look at. FWIW my post has zero set back.

I think he's asking about the length. He already knows he wants a zero setback post. The question is whether or not he will get away with a 300 mm post, I think - which got answered in the response from S-Express. Case closed.

BB

 

[Rustybucket]

thanks for everyone's help

Think I'll get the below and just wait for it to be delivered

https://www.evanscycles.com/zipp-service-course-350mm-0mm-offset-seatpost-EV239274

 

[HLaB]

I think he's asking about the length. He already knows he wants a zero setback post. The question is whether or not he will get away with a 300 mm post, I think - which got answered in the response from S-Express. Case closed.

BB

Yip I thought he was asking initially about the length too, but Rusty now says his post sits too far back; the length won't change that (assuming its set up at the comfortable/practical height) there'll just be more post in the seat tube only the set back will affect that.

 

[bonsaibilly]

Yip I thought he was asking initially about the length too, but Rusty now says his post sits too far back; the length won't change that (assuming its set up at the comfortable/practical height) there'll just be more post in the seat tube only the set back will affect that.

He *is* asking about the length!!

He wants to know if he gets a 300 whether it will have enough inserted to be safe, or does he need to get a 400 to be safe. He's not expecting the length of the post to affect setback. He already knows what he wants with setback.

BB

 

[HLaB]

He *is* asking about the length!!

He wants to know if he gets a 300 whether it will have enough inserted to be safe, or does he need to get a 400 to be safe. He's not expecting the length of the post to affect setback. He already knows what he wants with setback.

BB

I'm still reading

As it sits too far back, need something more straight at the top

but no worries he's sorted now

 

[Rustybucket]

I'm still reading but no worries he's sorted now

I am indeed sorted! Will just get the 350 to match what I've got. Was being impatient and wanted to pick up either the 300 or 400 tomorrow