Heron Road Seatpost Size?

[Zac]

Can anyone confirm the seat post on their Heron Road is 27.2mm? 

According to Sheldon Brown's database, all Heron's use a 27.2 post, but the one I just tried to install wasn't going in at all. I rode by a shop and their calipers gave 26.8-9 for both the seat tube and existing seat post. 

The bike is fairly new to me, perhaps the seat tube got pinched at the top at some point.

[Josiah Anderson]

Zac, apologies if you already know this, but you can often tell if the top of a seat tube has been pinched down, because the sides of the slot won't be parallel. If it looks like the slot gets narrower towards the top, I'd try to carefully pry it open and see if a 27.2 post fits, but whether you want to try that on your Heron probably depends on your comfort level with gently bending steel.

Josiah Anderson 

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[Ted Durant]

On Thursday, May 23, 2024 at 8:19:16 PM UTC-5 Zac wrote:

Can anyone confirm the seat post on their Heron Road is 27.2mm? 

All of the ones made under my watch were 27.2 nominally, but the W'ford reamer was a bit out of spec and some of them needed 27.4 posts to keep from slipping. I'm pretty sure the 27.2 spec stayed through the Todd Kuzma era.

The "ears" on the Heron seat clusters will bend inward if the seat post bolt is over-tightened, which it has to be if you have one of the 27.4 frames. I ended up breaking a seat post bolt because of that. 

Ted Durant

Milwaukee WI USA 

[John Dewey]

I had a severaL great / memorable years working for RS in south central WI. A time and place for everything, right? 

Can confirm some WF issues with seatpins...of course, always smart to keep some old beer can shims handy. And when they're too tight, not so desirable—really scuffs up an otherwise beautiful (and $$$) Nitto bit. 

Jock

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[Zac]

Thank you all for the helpful comments. This bike is fairly new to me, but it does look like the ears at the top of the seat tube are slightly pinched, and the previous owner was using a smaller seat post size. I'll see if I can carefully pry it open for a 27.2 seat post.

[reynoldslugs]

Darn, I wish I'd had this knowledge 20 years ago when I got my Heron.  I still have it, pinched ears and slipping seat post and all.

It's still a nice bike, I converted to a 650 runabout-town bike a few years ago.  But that seat post slippage and busted binder bolt routine was kind of a pain.  

in its current iteration: 

https://www.flickr.com/photos/41563482@N06/albums/72157642068014924/

Max Beach

Santa Rosa CA

[Spencer Robinson]

Sorry to be late on this but  I can confirm that My Heron Road has a 27.2mm post.

[Zac]

Using a little pressure to pry open the seat tube worked — 27.2mm post is in.

Max, that's a sweet round-about-town bike!

[Ted Durant]

On Saturday, May 25, 2024 at 9:08:28 PM UTC-5 Zac wrote:

Using a little pressure to pry open the seat tube worked — 27.2mm post is in.

 

Excellent! I'm really glad that worked for you.