well, here's my Sam Hillborne build

[Peter Stock]

a bit slap-dash. I was trying to just use parts on hand to get it rolling.
Universals 61 calipers, a rare Specialixed triple crankset, everything else is ordinary.

but we've been out for a few test rides.

it feels .... different ... from my traditional road bikes, that's for sure. 
I have not yet dialed in the fit to feel fully comfortable. I feel as if I have too much weight on my hands - which is odd because the stem is rising.

I've shifted the saddle a bit further forward.

I'd like to get some fatter tires. apparently that's the thing with a SH. (the clearance really is HUGE.)

eh, we'll see. for the moment she's a good service bike.

Peter 

[Peter Stock]

does anyone know what the real ST and HT angles are for a SH?
Mine feels VERY laid back seattube wise.
by my amateur measuring I am getting
ST angle 71.6
HT angle 77.6

[Bill Lindsay]

Your seat tube angle measurement looks pretty close.  The Sam Hillborne geo charts I've seen over the last 12-13 years have always had a 71.5 degree seat tube angle.  

Your head tube angle measurement looks way off.  The Sam Hillborne geo charts I've seen over the last 12-13 years have had a head tube angle in the 72 degree neighborhood.  

Bill Lindsay

El Cerrito, CA

[Peter Stock]

I couldn't find any Geometry charts for a SH and I was about to give up and write the company when there it was, right on the main home page.

https://www.rivbike.com/pages/geometry

and you are so correct. My HT angle caculation is way off.
I'll measure again (just as an exercise.)

[Jack Barnes]

How do you like the ride with the big saddle bag? I think my Sam is the same size as yours, also with drop bars, and I commute with a single ortlieb rear pannier—been wondering about better ways to load it up. The assymmetrical loading never bothered me much but maybe I'm just carrying more stuff now. 

[Patrick Moore]

Saddlebags, even the better Rivendell designs, are going to sway somewhat unless supported by something underneath, and they may well brush the back of your thighs. Neither bothers me, though I prefer rack and panniers for allowing me easily to vary cubic capacity with load to be carried. 

I've never found that saddlebags affected the handling a great deal unless you had a huge weight in a very large Carradice-type bag, when sway could affect cornering, but IME, not so's you'd really care about it.

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Patrick Moore

Alburquerque, Nuevo Mexico, Etats Unis d'Amerique, Orbis Terrarum